Articles | Volume 16, issue 6
https://doi.org/10.5194/bg-16-1343-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-16-1343-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
01 Apr 2019
Research article |
| 01 Apr 2019
| 01 Apr 2019
Plant responses to volcanically elevated CO2 in two Costa Rican forests
Robert R. Bogue
Jet Propulsion Laboratory, California Institute of Technology, 4800
Oak Grove Drive, Pasadena, CA 91109, USA
Geology Department, Occidental College, 1600 Campus Road, Los Angeles,
CA 90041, USA
Department of Earth and Planetary Sciences, McGill University, 845
Sherbrooke Street, Montréal, QC H3A 0G4, Canada
Florian M. Schwandner
CORRESPONDING AUTHOR
Jet Propulsion Laboratory, California Institute of Technology, 4800
Oak Grove Drive, Pasadena, CA 91109, USA
Joint Institute for Regional Earth System Science and Engineering,
University of California Los Angeles, Los Angeles, CA 90095, USA
Joshua B. Fisher
Jet Propulsion Laboratory, California Institute of Technology, 4800
Oak Grove Drive, Pasadena, CA 91109, USA
Ryan Pavlick
Jet Propulsion Laboratory, California Institute of Technology, 4800
Oak Grove Drive, Pasadena, CA 91109, USA
Troy S. Magney
Jet Propulsion Laboratory, California Institute of Technology, 4800
Oak Grove Drive, Pasadena, CA 91109, USA
Caroline A. Famiglietti
Jet Propulsion Laboratory, California Institute of Technology, 4800
Oak Grove Drive, Pasadena, CA 91109, USA
Department of Earth System Science, Stanford University, 450 Serra
Mall, Stanford, CA 94305, USA
Kerry Cawse-Nicholson
Jet Propulsion Laboratory, California Institute of Technology, 4800
Oak Grove Drive, Pasadena, CA 91109, USA
Vineet Yadav
Jet Propulsion Laboratory, California Institute of Technology, 4800
Oak Grove Drive, Pasadena, CA 91109, USA
Justin P. Linick
Jet Propulsion Laboratory, California Institute of Technology, 4800
Oak Grove Drive, Pasadena, CA 91109, USA
Gretchen B. North
Biology Department, Occidental College, 1600 Campus Road, Los Angeles,
CA 90041, USA
Eliecer Duarte
Observatory of Volcanology and Seismology (OVSICORI), Universidad
Nacional de Costa Rica, 2386-3000 Heredia, Costa Rica
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Hanyu Liu, Felix R. Vogel, Misa Ishizawa, Zhen Zhang, Benjamin Poulter, Doug E. J. Worthy, Leyang Feng, Anna L. Gagné-Landmann, Ao Chen, Ziting Huang, Dylan C. Gaeta, Joe R. Melton, Douglas Chan, Vineet Yadav, Deborah Huntzinger, and Scot M. Miller
EGUsphere, https://doi.org/10.5194/egusphere-2025-2150, https://doi.org/10.5194/egusphere-2025-2150, 2025
This preprint is open for discussion and under review for Atmospheric Chemistry and Physics (ACP).
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We find that the state-of-the-art process-based methane flux models have both lower flux magnitude and reduced inter-model uncertainty compared to a previous model inter-comparison from over a decade ago. Despite these improvements, methane flux estimates from process-based models are still likely too high compared to atmospheric observations. We also find that models with simpler parameterizations often result in better agreement with atmospheric observations in high-latitude North America.
James Stegen, Amy J. Burgin, Michelle H. Busch, Joshua B. Fisher, Joshua Ladau, Jenna Abrahamson, Lauren Kinsman-Costello, Li Li, Xingyuan Chen, Thibault Datry, Nate McDowell, Corianne Tatariw, Anna Braswell, Jillian M. Deines, Julia A. Guimond, Peter Regier, Kenton Rod, Edward K. P. Bam, Etienne Fluet-Chouinard, Inke Forbrich, Kristin L. Jaeger, Teri O'Meara, Tim Scheibe, Erin Seybold, Jon N. Sweetman, Jianqiu Zheng, Daniel C. Allen, Elizabeth Herndon, Beth A. Middleton, Scott Painter, Kevin Roche, Julianne Scamardo, Ross Vander Vorste, Kristin Boye, Ellen Wohl, Margaret Zimmer, Kelly Hondula, Maggi Laan, Anna Marshall, and Kaizad F. Patel
Biogeosciences, 22, 995–1034, https://doi.org/10.5194/bg-22-995-2025, https://doi.org/10.5194/bg-22-995-2025, 2025
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The loss and gain of surface water (variable inundation) are common processes across Earth. Global change shifts variable inundation dynamics, highlighting a need for unified understanding that transcends individual variably inundated ecosystems (VIEs). We review the literature, highlight challenges, and emphasize opportunities to generate transferable knowledge by viewing VIEs through a common lens. We aim to inspire the emergence of a cross-VIE community based on a proposed continuum approach.
Jonathan Hobbs, Matthias Katzfuss, Hai Nguyen, Vineet Yadav, and Junjie Liu
Geosci. Model Dev., 17, 1133–1151, https://doi.org/10.5194/gmd-17-1133-2024, https://doi.org/10.5194/gmd-17-1133-2024, 2024
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The cycling of carbon among the land, oceans, and atmosphere is a closely monitored process in the global climate system. These exchanges between the atmosphere and the surface can be quantified using a combination of atmospheric carbon dioxide observations and computer models. This study presents a statistical method for investigating the similarities and differences in the estimated surface–atmosphere carbon exchange when different computer model assumptions are invoked.
Jinsol Kim, John B. Miller, Charles E. Miller, Scott J. Lehman, Sylvia E. Michel, Vineet Yadav, Nick E. Rollins, and William M. Berelson
Atmos. Chem. Phys., 23, 14425–14436, https://doi.org/10.5194/acp-23-14425-2023, https://doi.org/10.5194/acp-23-14425-2023, 2023
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In this study, we present the partitioning of CO2 signals from biogenic, petroleum and natural gas sources by combining CO, 13CO2 and 14CO2 measurements. Using measurements from flask air samples at three sites in the greater Los Angeles region, we find larger and positive contributions of biogenic signals in winter and smaller and negative contributions in summer. The largest contribution of natural gas combustion generally occurs in summer.
Vineet Yadav, Subhomoy Ghosh, and Charles E. Miller
Geosci. Model Dev., 16, 5219–5236, https://doi.org/10.5194/gmd-16-5219-2023, https://doi.org/10.5194/gmd-16-5219-2023, 2023
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Measuring the performance of inversions in linear Bayesian problems is crucial in real-life applications. In this work, we provide analytical forms of the local and global sensitivities of the estimated fluxes with respect to various inputs. We provide methods to uniquely map the observational signal to spatiotemporal domains. Utilizing this, we also show techniques to assess correlations between the Jacobians that naturally translate to nonstationary covariance matrix components.
Dien Wu, John C. Lin, Henrique F. Duarte, Vineet Yadav, Nicholas C. Parazoo, Tomohiro Oda, and Eric A. Kort
Geosci. Model Dev., 14, 3633–3661, https://doi.org/10.5194/gmd-14-3633-2021, https://doi.org/10.5194/gmd-14-3633-2021, 2021
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A model (SMUrF) is presented that estimates biogenic CO2 fluxes over cities around the globe to separate out biogenic fluxes from anthropogenic emissions. The model leverages satellite-based solar-induced fluorescence data and a machine-learning technique. We evaluate the biogenic fluxes against flux observations and show contrasts between biogenic and anthropogenic fluxes over cities, revealing urban–rural flux gradients, diurnal cycles, and the resulting imprints on atmospheric-column CO2.
Paul C. Stoy, Tarek S. El-Madany, Joshua B. Fisher, Pierre Gentine, Tobias Gerken, Stephen P. Good, Anne Klosterhalfen, Shuguang Liu, Diego G. Miralles, Oscar Perez-Priego, Angela J. Rigden, Todd H. Skaggs, Georg Wohlfahrt, Ray G. Anderson, A. Miriam J. Coenders-Gerrits, Martin Jung, Wouter H. Maes, Ivan Mammarella, Matthias Mauder, Mirco Migliavacca, Jacob A. Nelson, Rafael Poyatos, Markus Reichstein, Russell L. Scott, and Sebastian Wolf
Biogeosciences, 16, 3747–3775, https://doi.org/10.5194/bg-16-3747-2019, https://doi.org/10.5194/bg-16-3747-2019, 2019
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Key findings are the nearly optimal response of T to atmospheric water vapor pressure deficits across methods and scales. Additionally, the notion that T / ET intermittently approaches 1, which is a basis for many partitioning methods, does not hold for certain methods and ecosystems. To better constrain estimates of E and T from combined ET measurements, we propose a combination of independent measurement techniques to better constrain E and T at the ecosystem scale.
Annmarie Eldering, Thomas E. Taylor, Christopher W. O'Dell, and Ryan Pavlick
Atmos. Meas. Tech., 12, 2341–2370, https://doi.org/10.5194/amt-12-2341-2019, https://doi.org/10.5194/amt-12-2341-2019, 2019
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NASA's Orbiting Carbon Observatory-3 (OCO-3) is scheduled for a 2019 launch to the International Space Station (ISS). It is expected to continue the record of column carbon dioxide (XCO2) and solar-induced chlorophyll fluorescence (SIF) measurements from space used to study and constrain the Earth's carbon cycle. This work highlights the measurement objectives and uses simulated data to show that the expected instrument performance is on par with that of OCO-2.
Mingjie Shi, Joshua B. Fisher, Richard P. Phillips, and Edward R. Brzostek
Biogeosciences, 16, 457–465, https://doi.org/10.5194/bg-16-457-2019, https://doi.org/10.5194/bg-16-457-2019, 2019
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The ability of plants to slow climate change by taking up carbon hinges in part on there being ample soil nitrogen. We used a model that accounts for the carbon cost to plants of supporting nitrogen-acquiring microbes to explore how nitrogen limitation affects climate. Our model predicted that nitrogen limitation will enhance temperature and decrease precipitation; thus, our results suggest that carbon spent to support nitrogen-acquiring microbes is a critical component of the Earth's climate.
Kerry Cawse-Nicholson, Joshua B. Fisher, Caroline A. Famiglietti, Amy Braverman, Florian M. Schwandner, Jennifer L. Lewicki, Philip A. Townsend, David S. Schimel, Ryan Pavlick, Kathryn J. Bormann, Antonio Ferraz, Emily L. Kang, Pulong Ma, Robert R. Bogue, Thomas Youmans, and David C. Pieri
Biogeosciences, 15, 7403–7418, https://doi.org/10.5194/bg-15-7403-2018, https://doi.org/10.5194/bg-15-7403-2018, 2018
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Carbon dioxide levels are rising globally, and it is important to understand how this rise will affect plants over long time periods. Volcanoes such as Mammoth Mountain, California, have been releasing CO2 from their flanks for decades, and this provides a test environment in order to study the way plants respond to long-term CO2 exposure. We combined several airborne measurements to show that plants may have fewer, more productive leaves in areas with increasing CO2.
Carlos Jiménez, Brecht Martens, Diego M. Miralles, Joshua B. Fisher, Hylke E. Beck, and Diego Fernández-Prieto
Hydrol. Earth Syst. Sci., 22, 4513–4533, https://doi.org/10.5194/hess-22-4513-2018, https://doi.org/10.5194/hess-22-4513-2018, 2018
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Observing the amount of water evaporated in nature is not easy, and we need to combine accurate local measurements with estimates from satellites, more uncertain but covering larger areas. This is the main topic of our paper, in which local observations are compared with global land evaporation estimates, followed by a weighting of the global observations based on this comparison to attempt derive a more accurate evaporation product.
Scot M. Miller, Anna M. Michalak, Vineet Yadav, and Jovan M. Tadić
Atmos. Chem. Phys., 18, 6785–6799, https://doi.org/10.5194/acp-18-6785-2018, https://doi.org/10.5194/acp-18-6785-2018, 2018
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NASA's Orbiting Carbon Observatory 2 (OCO-2) satellite observes CO2 in the atmosphere globally. We evaluate the extent to which current OCO-2 observations can inform scientific understanding of the biospheric carbon balance. We find that current observations are best-equipped to constrain the biospheric carbon balance across continental or hemispheric regions and provide limited information on smaller regions.
Kristal R. Verhulst, Anna Karion, Jooil Kim, Peter K. Salameh, Ralph F. Keeling, Sally Newman, John Miller, Christopher Sloop, Thomas Pongetti, Preeti Rao, Clare Wong, Francesca M. Hopkins, Vineet Yadav, Ray F. Weiss, Riley M. Duren, and Charles E. Miller
Atmos. Chem. Phys., 17, 8313–8341, https://doi.org/10.5194/acp-17-8313-2017, https://doi.org/10.5194/acp-17-8313-2017, 2017
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We present the first carbon dioxide (CO2) and methane (CH4) measurements from an extensive surface network as part of the Los Angeles Megacity Carbon Project. We describe methods that are essential for understanding carbon fluxes from complex urban environments. CO2 and CH4 levels are spatially and temporally variable, with urban sites showing significant enhancements relative to background. In 2015, the median afternoon enhancement near downtown Los Angeles was ~15 ppm CO2 and ~80 ppb CH4.
Annmarie Eldering, Chris W. O'Dell, Paul O. Wennberg, David Crisp, Michael R. Gunson, Camille Viatte, Charles Avis, Amy Braverman, Rebecca Castano, Albert Chang, Lars Chapsky, Cecilia Cheng, Brian Connor, Lan Dang, Gary Doran, Brendan Fisher, Christian Frankenberg, Dejian Fu, Robert Granat, Jonathan Hobbs, Richard A. M. Lee, Lukas Mandrake, James McDuffie, Charles E. Miller, Vicky Myers, Vijay Natraj, Denis O'Brien, Gregory B. Osterman, Fabiano Oyafuso, Vivienne H. Payne, Harold R. Pollock, Igor Polonsky, Coleen M. Roehl, Robert Rosenberg, Florian Schwandner, Mike Smyth, Vivian Tang, Thomas E. Taylor, Cathy To, Debra Wunch, and Jan Yoshimizu
Atmos. Meas. Tech., 10, 549–563, https://doi.org/10.5194/amt-10-549-2017, https://doi.org/10.5194/amt-10-549-2017, 2017
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This paper describes the measurements of atmospheric carbon dioxide collected in the first 18 months of the satellite mission known as the Orbiting Carbon Observatory-2 (OCO-2). The paper shows maps of the carbon dioxide data, data density, and other data fields that illustrate the data quality. This mission has collected a more precise, more dense dataset of carbon dioxide then we have ever had previously.
David Crisp, Harold R. Pollock, Robert Rosenberg, Lars Chapsky, Richard A. M. Lee, Fabiano A. Oyafuso, Christian Frankenberg, Christopher W. O'Dell, Carol J. Bruegge, Gary B. Doran, Annmarie Eldering, Brendan M. Fisher, Dejian Fu, Michael R. Gunson, Lukas Mandrake, Gregory B. Osterman, Florian M. Schwandner, Kang Sun, Tommy E. Taylor, Paul O. Wennberg, and Debra Wunch
Atmos. Meas. Tech., 10, 59–81, https://doi.org/10.5194/amt-10-59-2017, https://doi.org/10.5194/amt-10-59-2017, 2017
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The Orbiting Carbon Observatory-2 carries and points a three-channel imaging grating spectrometer designed to collect high-resolution spectra of reflected sunlight within the molecular oxygen A-band at 0.765 microns and the carbon dioxide bands at 1.61 and 2.06 microns. Here, we describe the OCO-2 instrument, its data products, and its performance during its first 18 months in orbit.
A. Anthony Bloom, Thomas Lauvaux, John Worden, Vineet Yadav, Riley Duren, Stanley P. Sander, and David S. Schimel
Atmos. Chem. Phys., 16, 15199–15218, https://doi.org/10.5194/acp-16-15199-2016, https://doi.org/10.5194/acp-16-15199-2016, 2016
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Understanding terrestrial carbon processes is a major challenge in climate science. We define the satellite system required to understand greenhouse gas biogeochemistry: our study is focused on Amazon wetland CH4 emissions. We find that future geostationary satellites will provide the CH4 measurements required to understand wetland CH4 processes. Low-earth orbit satellites will be unable to resolve wetland CH4 processes due to a low number of cloud-free CH4 measurements over the Amazon basin.
Vineet Yadav and Anna M. Michalak
Geosci. Model Dev. Discuss., https://doi.org/10.5194/gmd-2016-204, https://doi.org/10.5194/gmd-2016-204, 2016
Revised manuscript has not been submitted
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Multiplication of two matrices that consists of few non-zero entries is a fundamental operation in problems that involve estimation of greenhouse gas fluxes from atmospheric measurements. To increase computational efficiency of estimating these quantities, modification of the standard matrix multiplication algorithm for multiplying these matrices is proposed in this research.
Joshua B. Fisher, Munish Sikka, Deborah N. Huntzinger, Christopher Schwalm, and Junjie Liu
Biogeosciences, 13, 4271–4277, https://doi.org/10.5194/bg-13-4271-2016, https://doi.org/10.5194/bg-13-4271-2016, 2016
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Atmospheric models of CO2 require estimates of land CO2 fluxes at relatively high temporal resolutions because of the high rate of atmospheric mixing and wind heterogeneity. However, land CO2 fluxes are often provided at monthly time steps. Here, we describe a new dataset created from 15 global land models and 4 combined products in the Multi-scale Synthesis and Terrestrial Model Intercomparison Project (MsTMIP), which we have converted from monthly to 3-hourly output.
K. E. Clark, M. A. Torres, A. J. West, R. G. Hilton, M. New, A. B. Horwath, J. B. Fisher, J. M. Rapp, A. Robles Caceres, and Y. Malhi
Hydrol. Earth Syst. Sci., 18, 5377–5397, https://doi.org/10.5194/hess-18-5377-2014, https://doi.org/10.5194/hess-18-5377-2014, 2014
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This paper presents measurements of the balance of water inputs and outputs over 1 year for a river basin in the Andes of Peru. Our results show that the annual water budget is balanced within a few percent uncertainty; that is to say, the amount of water entering the basin was the same as the amount leaving, providing important information for understanding the water cycle. We also show that seasonal storage of water is important in sustaining the flow of water during the dry season.
Related subject area
Biogeochemistry: Greenhouse Gases
Intercomparison of biogenic CO2 flux models in four urban parks in the city of Zurich
CO2 flux characteristics of the open savanna and its response to environmental factors in the dry–hot valley of Jinsha River, China
Rising Arctic seas and thawing permafrost: uncovering the carbon cycle impact in a thermokarst lagoon system in the outer Mackenzie Delta, Canada
Modelling decadal trends and the impact of extreme events on carbon fluxes in a temperate deciduous forest using a terrestrial biosphere model
Surface CO2 gradients challenge conventional CO2 emission quantification in lentic water bodies under calm conditions
Spatiotemporal variability of CO2, N2O and CH4 fluxes from a semi-deciduous tropical forest soil in the Congo Basin
Eddy-covariance fluxes of CO2, CH4 and N2O in a drained peatland forest after clear-cutting
Eddy covariance evaluation of ecosystem fluxes at a temperate saltmarsh in Victoria, Australia, shows large CO2 uptake
Interferences caused by the biogeochemical methane cycle in peats during the assessment of abandoned oil wells
Carbon sequestration in different urban vegetation types in Southern Finland
Groundwater-CO2 Emissions Relationship in Dutch Peatlands Derived by Machine Learning Using Airborne and Ground-Based Eddy Covariance Data
Proglacial methane emissions driven by meltwater and groundwater flushing in a high-Arctic glacial catchment
Seasonal and interannual variability in CO2 fluxes in southern Africa seen by GOSAT
Water chemistry and greenhouse gas concentrations in waterbodies of a thawing permafrost peatland complex in northern Norway
Air temperature and precipitation constraining the modelled wetland methane emissions in a boreal region in northern Europe
Ensemble estimates of global wetland methane emissions over 2000–2020
Seasonal carbon fluxes from vegetation and soil in a Mediterranean non-tidal salt marsh
Explainable machine learning for modeling of net ecosystem exchange in boreal forests
Dynamics of CO2 and CH4 fluxes in Red Sea mangrove soils
Inferring methane emissions from African livestock by fusing drone, tower, and satellite data
Nitrous oxide (N2O) in Macquarie Harbour, Tasmania
Technical note: A low-cost, automatic soil–plant–atmosphere enclosure system to investigate CO2 and evapotranspiration flux dynamics
Tidal influence on carbon dioxide and methane fluxes from tree stems and soils in mangrove forests
Drought conditions disrupt atmospheric carbon uptake in a Mediterranean saline lake
Physicochemical perturbation increases nitrous oxide production from denitrification in soils and sediments
Uncertainties in carbon emissions from land use and land cover change in Indonesia
Carbon degradation and mobilisation potentials of thawing permafrost peatlands in northern Norway inferred from laboratory incubations
Saturating response of photosynthesis to increasing leaf area index allows selective harvest of trees without affecting forest productivity
Seasonal dynamics and regional distribution patterns of CO2 and CH4 in the north-eastern Baltic Sea
Interannual and seasonal variability of the air–sea CO2 exchange at Utö in the coastal region of the Baltic Sea
CO2 emissions of drained coastal peatlands in the Netherlands and potential emission reduction by water infiltration systems
Influence of wind strength and direction on diffusive methane fluxes and atmospheric methane concentrations above the North Sea
Using eddy covariance observations to determine the carbon sequestration characteristics of subalpine forests in the Qinghai–Tibet Plateau
Isotopomer labeling and oxygen dependence of hybrid nitrous oxide production
The emission of CO from tropical rainforest soils
Modelling CO2 and N2O emissions from soils in silvopastoral systems of the West African Sahelian band
A case study on topsoil removal and rewetting for paludiculture: effect on biogeochemistry and greenhouse gas emissions from Typha latifolia, Typha angustifolia, and Azolla filiculoides
Observations of methane net sinks in the Arctic tundra
Methane, carbon dioxide and nitrous oxide emissions from two clear-water and two turbid-water urban ponds in Brussels (Belgium)
Assessing improvements in global ocean pCO2 machine learning reconstructions with Southern Ocean autonomous sampling
Timescale dependence of airborne fraction and underlying climate–carbon-cycle feedbacks for weak perturbations in CMIP5 models
Technical note: Preventing CO2 overestimation from mercuric or copper(II) chloride preservation of dissolved greenhouse gases in freshwater samples
Exploring temporal and spatial variation of nitrous oxide flux using several years of peatland forest automatic chamber data
Diurnal versus spatial variability of greenhouse gas emissions from an anthropogenically modified lowland river in Germany
Regional assessment and uncertainty analysis of carbon and nitrogen balances at cropland scale using the ecosystem model LandscapeDNDC
Resolving heterogeneous fluxes from tundra halves the growing season carbon budget
Lawns and meadows in urban green space – a comparison from perspectives of greenhouse gases, drought resilience and plant functional types
Large contribution of soil N2O emission to the global warming potential of a large-scale oil palm plantation despite changing from conventional to reduced management practices
Identifying landscape hot and cold spots of soil greenhouse gas fluxes by combining field measurements and remote sensing data
Enhanced Southern Ocean CO2 outgassing as a result of stronger and poleward shifted southern hemispheric westerlies
Stavros Stagakis, Dominik Brunner, Junwei Li, Leif Backman, Anni Karvonen, Lionel Constantin, Leena Järvi, Minttu Havu, Jia Chen, Sophie Emberger, and Liisa Kulmala
Biogeosciences, 22, 2133–2161, https://doi.org/10.5194/bg-22-2133-2025, https://doi.org/10.5194/bg-22-2133-2025, 2025
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The balance between CO2 uptake and emissions from urban green areas is still not well understood. This study evaluated for the first time the urban park CO2 exchange simulations with four different types of biosphere model by comparing them with observations. Even though some advantages and disadvantages of the different model types were identified, there was no strong evidence that more complex models performed better than simple ones.
Chaolei Yang, Yufeng Tian, Jingqi Cui, Guangxiong He, Jingyuan Li, Canfeng Li, Haichuang Duan, Zong Wei, Liu Yan, Xin Xia, Yong Huang, Aihua Jiang, and Yuwen Feng
Biogeosciences, 22, 2097–2114, https://doi.org/10.5194/bg-22-2097-2025, https://doi.org/10.5194/bg-22-2097-2025, 2025
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Due to the influence of extreme-drought events in southwest China, the carbon sequestration capacity of the open savanna in the dry–hot valley of the Jinsha River has been significantly diminished, with soil water content being the key environmental factor governing CO2 flux. Under the climate scenario where the frequency and severity of extreme droughts are expected to continue increasing, the CO2 emissions from the open savanna are also anticipated to rise persistently.
Maren Jenrich, Juliane Wolter, Susanne Liebner, Christian Knoblauch, Guido Grosse, Fiona Giebeler, Dustin Whalen, and Jens Strauss
Biogeosciences, 22, 2069–2086, https://doi.org/10.5194/bg-22-2069-2025, https://doi.org/10.5194/bg-22-2069-2025, 2025
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Climate warming in the Arctic is causing the erosion of permafrost coasts and the transformation of permafrost lakes into lagoons. To understand how this affects greenhouse gas (GHG) emissions, we studied carbon dioxide (CO₂) and methane (CH₄) production in lagoons with varying sea connections. Younger lagoons produce more CH₄, while CO₂ increases under more marine conditions. Flooding of permafrost lowlands due to rising sea levels may lead to higher GHG emissions from Arctic coasts in future.
Tea Thum, Tuuli Miinalainen, Outi Seppälä, Holly Croft, Cheryl Rogers, Ralf Staebler, Silvia Caldararu, and Sönke Zaehle
Biogeosciences, 22, 1781–1807, https://doi.org/10.5194/bg-22-1781-2025, https://doi.org/10.5194/bg-22-1781-2025, 2025
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Climate change has the potential to influence the carbon sequestration potential of terrestrial ecosystems, and here the nitrogen cycle is also important. We used the terrestrial biosphere model QUINCY (QUantifying Interactions between terrestrial Nutrient CYcles and the climate system) in a mixed deciduous forest in Canada. We investigated the usefulness of using the leaf area index and leaf chlorophyll content to improve the parameterization of the model. This work paves the way for using spaceborne observations in model parameterizations, also including information on the nitrogen cycle.
Patrick Aurich, Uwe Spank, and Matthias Koschorreck
Biogeosciences, 22, 1697–1709, https://doi.org/10.5194/bg-22-1697-2025, https://doi.org/10.5194/bg-22-1697-2025, 2025
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Lakes can be sources and sinks of the greenhouse gas carbon dioxide. The gas exchange between the atmosphere and the water can be measured by taking gas samples from them. However, the depth of water samples is not well defined, which may cause errors. We hypothesized that gradients of CO2 concentrations develop under the surface when wind speeds are very low. Our measurements show that such a gradient can occur on calm nights, potentially shifting lakes from a CO2 sink to a source.
Roxanne Daelman, Marijn Bauters, Matti Barthel, Emmanuel Bulonza, Lodewijk Lefevre, José Mbifo, Johan Six, Klaus Butterbach-Bahl, Benjamin Wolf, Ralf Kiese, and Pascal Boeckx
Biogeosciences, 22, 1529–1542, https://doi.org/10.5194/bg-22-1529-2025, https://doi.org/10.5194/bg-22-1529-2025, 2025
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The increase in atmospheric concentrations of several greenhouse gases (GHGs) since 1750 is attributed to human activity. However, natural ecosystems, such as tropical forests, also contribute to GHG budgets. The Congo Basin hosts the second largest tropical forest and is understudied. In this study, measurements of soil GHG exchange were carried out during 16 months in a tropical forest in the Congo Basin. Overall, the soil acted as a major source of CO2 and N2O and a minor sink of CH4.
Olli-Pekka Tikkasalo, Olli Peltola, Pavel Alekseychik, Juha Heikkinen, Samuli Launiainen, Aleksi Lehtonen, Qian Li, Eduardo Martínez-García, Mikko Peltoniemi, Petri Salovaara, Ville Tuominen, and Raisa Mäkipää
Biogeosciences, 22, 1277–1300, https://doi.org/10.5194/bg-22-1277-2025, https://doi.org/10.5194/bg-22-1277-2025, 2025
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The emissions of greenhouse gases (GHGs) carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) were measured from a clear-cut peatland forest site. The measurements covered the whole year of 2022, which was the second growing season after the clear-cut. The site was a strong GHG source, and the highest emissions came from CO2, followed by N2O and CH4. A statistical model that included information on different surfaces at the site was developed to unravel surface-type-specific GHG fluxes.
Ruth Reef, Edoardo Daly, Tivanka Anandappa, Eboni-Jane Vienna-Hallam, Harriet Robertson, Matthew Peck, and Adrien Guyot
Biogeosciences, 22, 1149–1162, https://doi.org/10.5194/bg-22-1149-2025, https://doi.org/10.5194/bg-22-1149-2025, 2025
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Studies show that saltmarshes excel at capturing carbon from the atmosphere. In this study, we measured CO2 flux in an Australian temperate saltmarsh on French Island. The temperate saltmarsh exhibited strong seasonality. During the warmer growing season, the saltmarsh absorbed 10.5 g CO2 m−2 on average daily from the atmosphere. Even in winter, when plants were dormant, it continued to be a CO2 sink, albeit a smaller one. Cool temperatures and high cloud cover inhibit carbon sequestration.
Sebastian F. A. Jordan, Stefan Schloemer, Martin Krüger, Tanja Heffner, Marcus A. Horn, and Martin Blumenberg
Biogeosciences, 22, 809–830, https://doi.org/10.5194/bg-22-809-2025, https://doi.org/10.5194/bg-22-809-2025, 2025
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Using a multilayer approach, we studied the methane flux, soil gas composition, and isotopic signatures of soil methane and carbon dioxide at eight cut and buried abandoned oil wells in a peat-rich area of northern Germany. The detected methane emissions were of biogenic, peat origin and were not associated with the abandoned wells. Additional microbial analysis and methane oxidation rate measurements demonstrated a high methane emission mitigation potential in the studied peat soils.
Laura Thölix, Leif Backman, Minttu Havu, Esko Karvinen, Jesse Soininen, Justine Trémeau, Olli Nevalainen, Joyson Ahongshangbam, Leena Järvi, and Liisa Kulmala
Biogeosciences, 22, 725–749, https://doi.org/10.5194/bg-22-725-2025, https://doi.org/10.5194/bg-22-725-2025, 2025
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Cities aim for carbon neutrality and seek to understand urban vegetation's role as a carbon sink. Direct measurements are challenging, so models are used to estimate the urban carbon cycle. We evaluated model performance at estimating carbon sequestration in lawns, park trees, and urban forests in Helsinki, Finland. Models captured seasonal and annual variations well. Trees had higher sequestration rates than lawns, and irrigation often enhanced carbon sinks.
Laura M. van der Poel, Laurent V. Bataille, Bart Kruijt, Wietse Franssen, Wilma Jans, Jan Biermann, Anne Rietman, Alex J. V. Buzacott, Ype van der Velde, Ruben Boelens, and Ronald W. A. Hutjes
EGUsphere, https://doi.org/10.5194/egusphere-2025-431, https://doi.org/10.5194/egusphere-2025-431, 2025
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We combine two types of carbon dioxide (CO2) data from Dutch peatlands in a machine learning model: from fixed measurement towers and from a light research aircraft. We find that emissions increase with deeper water table depths (WTD) by 4.6 tonnes CO2 per hectare per year, per 10 cm deeper WTD on average. The effect is stronger in winter than in summer and varies between locations. This variability should be taken into account when developing mitigation measures.
Gabrielle E. Kleber, Leonard Magerl, Alexandra V. Turchyn, Stefan Schloemer, Mark Trimmer, Yizhu Zhu, and Andrew Hodson
Biogeosciences, 22, 659–674, https://doi.org/10.5194/bg-22-659-2025, https://doi.org/10.5194/bg-22-659-2025, 2025
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Our research on Svalbard shows that glacier melt rivers can transport large amounts of methane, a potent greenhouse gas. By studying a glacier over one summer, we found that its river was highly concentrated in methane, suggesting that rivers could provide a significant source of methane emissions as the Arctic warms and glaciers melt. This is the first time such emissions have been measured on Svalbard, indicating a wider environmental concern as such processes are occurring across the Arctic.
Eva-Marie Metz, Sanam Noreen Vardag, Sourish Basu, Martin Jung, and André Butz
Biogeosciences, 22, 555–584, https://doi.org/10.5194/bg-22-555-2025, https://doi.org/10.5194/bg-22-555-2025, 2025
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We estimate CO2 fluxes in semiarid southern Africa from 2009 to 2018 based on satellite CO2 measurements and atmospheric inverse modeling. By selecting process-based vegetation models, which agree with the satellite CO2 fluxes, we find that soil respiration mainly drives the seasonality, whereas photosynthesis substantially influences the interannual variability. Our study emphasizes the need for better representation of the response of semiarid ecosystems to soil rewetting in vegetation models.
Jacqueline Kay Knutson, François Clayer, Peter Dörsch, Sebastian Westermann, and Heleen A. de Wit
EGUsphere, https://doi.org/10.5194/egusphere-2025-184, https://doi.org/10.5194/egusphere-2025-184, 2025
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Thawing permafrost at Iškoras in northern Norway is transforming peat plateaus into thermokarst ponds and wetlands. These small ponds show striking oversaturation of dissolved greenhouse gases like carbon dioxide (CO2) and methane (CH4), partly due to organic matter processing. Streams nearby emit CO2 driven by turbulence. As permafrost disappears, carbon dynamics will change, potentially increasing emissions of CH4. This study highlights the need to integrate these changes into climate models.
Tuula Aalto, Aki Tsuruta, Jarmo Mäkelä, Jurek Müller, Maria Tenkanen, Eleanor Burke, Sarah Chadburn, Yao Gao, Vilma Mannisenaho, Thomas Kleinen, Hanna Lee, Antti Leppänen, Tiina Markkanen, Stefano Materia, Paul A. Miller, Daniele Peano, Olli Peltola, Benjamin Poulter, Maarit Raivonen, Marielle Saunois, David Wårlind, and Sönke Zaehle
Biogeosciences, 22, 323–340, https://doi.org/10.5194/bg-22-323-2025, https://doi.org/10.5194/bg-22-323-2025, 2025
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Wetland methane responses to temperature and precipitation were studied in a boreal wetland-rich region in northern Europe using ecosystem models, atmospheric inversions, and upscaled flux observations. The ecosystem models differed in their responses to temperature and precipitation and in their seasonality. However, multi-model means, inversions, and upscaled fluxes had similar seasonality, and they suggested co-limitation by temperature and precipitation.
Zhen Zhang, Benjamin Poulter, Joe R. Melton, William J. Riley, George H. Allen, David J. Beerling, Philippe Bousquet, Josep G. Canadell, Etienne Fluet-Chouinard, Philippe Ciais, Nicola Gedney, Peter O. Hopcroft, Akihiko Ito, Robert B. Jackson, Atul K. Jain, Katherine Jensen, Fortunat Joos, Thomas Kleinen, Sara H. Knox, Tingting Li, Xin Li, Xiangyu Liu, Kyle McDonald, Gavin McNicol, Paul A. Miller, Jurek Müller, Prabir K. Patra, Changhui Peng, Shushi Peng, Zhangcai Qin, Ryan M. Riggs, Marielle Saunois, Qing Sun, Hanqin Tian, Xiaoming Xu, Yuanzhi Yao, Yi Xi, Wenxin Zhang, Qing Zhu, Qiuan Zhu, and Qianlai Zhuang
Biogeosciences, 22, 305–321, https://doi.org/10.5194/bg-22-305-2025, https://doi.org/10.5194/bg-22-305-2025, 2025
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This study assesses global methane emissions from wetlands between 2000 and 2020 using multiple models. We found that wetland emissions increased by 6–7 Tg CH4 yr-1 in the 2010s compared to the 2000s. Rising temperatures primarily drove this increase, while changes in precipitation and CO2 levels also played roles. Our findings highlight the importance of wetlands in the global methane budget and the need for continuous monitoring to understand their impact on climate change.
Lorena Carrasco-Barea, Dolors Verdaguer, Maria Gispert, Xavier D. Quintana, Hélène Bourhis, and Laura Llorens
Biogeosciences, 22, 289–304, https://doi.org/10.5194/bg-22-289-2025, https://doi.org/10.5194/bg-22-289-2025, 2025
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Carbon dioxide fluxes have been measured seasonally in four plant species in a Mediterranean non-tidal salt marsh, highlighting the high carbon removal potential that these species have. Carbon dioxide and methane emissions from soil showed high variability among the habitats studied, and they were generally higher than those observed in tidal salt marshes. Our results are important for making more accurate predictions regarding carbon emissions from these ecosystems.
Ekaterina Ezhova, Topi Laanti, Anna Lintunen, Pasi Kolari, Tuomo Nieminen, Ivan Mammarella, Keijo Heljanko, and Markku Kulmala
Biogeosciences, 22, 257–288, https://doi.org/10.5194/bg-22-257-2025, https://doi.org/10.5194/bg-22-257-2025, 2025
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Machine learning (ML) models are gaining popularity in biogeosciences. They are applied as gap-filling methods and used to upscale carbon fluxes to larger areas. Here we use explainable artificial intelligence (XAI) methods to elucidate the performance of machine learning models for carbon dioxide fluxes in boreal forests. We show that statistically equal models treat input variables differently. XAI methods can help scientists make informed decisions when applying ML models in their research.
Jessica Breavington, Alexandra Steckbauer, Chuancheng Fu, Mongi Ennasri, and Carlos M. Duarte
Biogeosciences, 22, 117–134, https://doi.org/10.5194/bg-22-117-2025, https://doi.org/10.5194/bg-22-117-2025, 2025
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Mangrove carbon storage in the Red Sea is lower than average due to challenging growth conditions. We collected mangrove soil cores over multiple seasons to measure greenhouse gas (GHG) flux of carbon dioxide and methane. GHG emissions are a small offset to mangrove carbon storage overall but punctuated by periods of high emission. This variation is linked to environmental and soil properties, which were also measured. The findings aid understanding of GHG dynamics in arid mangrove ecosystems.
Alouette van Hove, Kristoffer Aalstad, Vibeke Lind, Claudia Arndt, Vincent Odongo, Rodolfo Ceriani, Francesco Fava, John Hulth, and Norbert Pirk
EGUsphere, https://doi.org/10.5194/egusphere-2024-3994, https://doi.org/10.5194/egusphere-2024-3994, 2025
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Research on methane emissions from African livestock is limited. We used a probabilistic method fusing drone and flux tower observations with an atmospheric model to estimate emissions from various herds. This approach proved robust under non-stationary wind conditions and effective in estimating emissions as low as 100 g h-1. We also detected herd locations using spectral anomalies in satellite data. Our approach can be used to estimate diverse sources, thereby improving emission inventories.
Johnathan Daniel Maxey, Neil D. Hartstein, Hermann W. Bange, and Moritz Müller
Biogeosciences, 21, 5613–5637, https://doi.org/10.5194/bg-21-5613-2024, https://doi.org/10.5194/bg-21-5613-2024, 2024
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The distribution of N2O in fjord-like estuaries is poorly described in the Southern Hemisphere. Our study describes N2O distribution and its drivers in one such system in Macquarie Harbour, Tasmania. Water samples were collected seasonally in 2022 and 2023. Results show the system removes atmospheric N2O when river flow is high, whereas the system emits N2O when the river flow is low. N2O generated in basins is intercepted by the surface water and exported to the ocean during high river flow.
Wael Al Hamwi, Maren Dubbert, Jörg Schaller, Matthias Lück, Marten Schmidt, and Mathias Hoffmann
Biogeosciences, 21, 5639–5651, https://doi.org/10.5194/bg-21-5639-2024, https://doi.org/10.5194/bg-21-5639-2024, 2024
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We present a fully automatic, low-cost soil–plant enclosure system to monitor CO2 and evapotranspiration fluxes within greenhouse experiments. It operates in two modes: independent, using low-cost sensors, and dependent, where multiple chambers connect to a single gas analyzer via a low-cost multiplexer. This system provides precise, accurate measurements and high temporal resolution, enabling comprehensive monitoring of plant–soil responses to various treatments and conditions.
Zhao-Jun Yong, Wei-Jen Lin, Chiao-Wen Lin, and Hsing-Juh Lin
Biogeosciences, 21, 5247–5260, https://doi.org/10.5194/bg-21-5247-2024, https://doi.org/10.5194/bg-21-5247-2024, 2024
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We measured CO2 and CH4 fluxes from mangrove stems and soils of Avicennia marina and Kandelia obovata during tidal cycles. Both stem types served as CO2 and CH4 sources, emitting less CH4 than soils, with no difference in CO2 flux. While A. marina stems showed increased CO2 fluxes from low to high tides, they acted as a CH4 sink before flooding and as a source after ebbing. However, K. obovata stems showed no flux pattern. This study highlights the need to consider tidal influence and species.
Ihab Alfadhel, Ignacio Peralta-Maraver, Isabel Reche, Enrique P. Sánchez-Cañete, Sergio Aranda-Barranco, Eva Rodríguez-Velasco, Andrew S. Kowalski, and Penélope Serrano-Ortiz
Biogeosciences, 21, 5117–5129, https://doi.org/10.5194/bg-21-5117-2024, https://doi.org/10.5194/bg-21-5117-2024, 2024
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Inland saline lakes are crucial in the global carbon cycle, but increased droughts may alter their carbon exchange capacity. We measured CO2 and CH4 fluxes in a Mediterranean saline lake using the eddy covariance method under dry and wet conditions. We found the lake acts as a carbon sink during wet periods but not during droughts. These results highlight the importance of saline lakes in carbon sequestration and their vulnerability to climate-change-induced droughts.
Nathaniel B. Weston, Cynthia Troy, Patrick J. Kearns, Jennifer L. Bowen, William Porubsky, Christelle Hyacinthe, Christof Meile, Philippe Van Cappellen, and Samantha B. Joye
Biogeosciences, 21, 4837–4851, https://doi.org/10.5194/bg-21-4837-2024, https://doi.org/10.5194/bg-21-4837-2024, 2024
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Nitrous oxide (N2O) is a potent greenhouse and ozone-depleting gas produced largely from microbial nitrogen cycling processes, and human activities have resulted in increases in atmospheric N2O. We investigate the role of physical and chemical disturbances to soils and sediments in N2O production. We demonstrate that physicochemical perturbation increases N2O production, microbial community adapts over time, and initial perturbation appears to confer resilience to subsequent disturbance.
Ida Bagus Mandhara Brasika, Pierre Friedlingstein, Stephen Sitch, Michael O'Sullivan, Maria Carolina Duran-Rojas, Thais Michele Rosan, Kees Klein Goldewijk, Julia Pongratz, Clemens Schwingshackl, Louise P. Chini, and George C. Hurtt
EGUsphere, https://doi.org/10.5194/egusphere-2024-3165, https://doi.org/10.5194/egusphere-2024-3165, 2024
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Indonesia is 3 world's highest carbon emitter from land use change. However, there are uncertainties of the carbon emission of Indonesia that can be reduced with satellite-based datasets. But later, we found that the uncertainties are also caused by the difference of carbon pool in various models. Our best estimation of carbon emissions from land use change in Indonesia is 0.12 ± 0.02 PgC/yr with steady trend. This double when include peat fire and peat drainage emissions.
Sigrid Trier Kjær, Sebastian Westermann, Nora Nedkvitne, and Peter Dörsch
Biogeosciences, 21, 4723–4737, https://doi.org/10.5194/bg-21-4723-2024, https://doi.org/10.5194/bg-21-4723-2024, 2024
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Permafrost peatlands are thawing due to climate change, releasing large quantities of carbon that degrades upon thawing and is released as CO2, CH4 or dissolved organic carbon (DOC). We incubated thawed Norwegian permafrost peat plateaus and thermokarst pond sediment found next to permafrost for up to 350 d to measure carbon loss. CO2 production was initially the highest, whereas CH4 production increased over time. The largest carbon loss was measured at the top of the peat plateau core as DOC.
Olivier Bouriaud, Ernst-Detlef Schulze, Konstantin Gregor, Issam Bourkhris, Peter Högberg, Roland Irslinger, Phillip Papastefanou, Julia Pongratz, Anja Rammig, Riccardo Valentini, and Christian Körner
EGUsphere, https://doi.org/10.5194/egusphere-2024-3092, https://doi.org/10.5194/egusphere-2024-3092, 2024
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The impact of harvesting on forests' carbon sink capacities is debated. One view is that their sink strength is resilient to harvesting, the other that it disrupts these capacities. Our work shows that leaf area index (LAI) has been overlooked in this discussion. We found that temperate forests' carbon uptake is largely insensitive to variations in LAI beyond about 4 m² m-², but that forests operate at higher levels.
Silvie Lainela, Erik Jacobs, Stella-Theresa Luik, Gregor Rehder, and Urmas Lips
Biogeosciences, 21, 4495–4519, https://doi.org/10.5194/bg-21-4495-2024, https://doi.org/10.5194/bg-21-4495-2024, 2024
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We evaluate the variability of carbon dioxide and methane in the surface layer of the north-eastern basins of the Baltic Sea in 2018. We show that the shallower coastal areas have considerably higher spatial variability and seasonal amplitude of surface layer pCO2 and cCH4 than measured in the offshore areas of the Baltic Sea. Despite this high variability, caused mostly by coastal physical processes, the average annual air–sea CO2 fluxes differed only marginally between the sub-basins.
Martti Honkanen, Mika Aurela, Juha Hatakka, Lumi Haraguchi, Sami Kielosto, Timo Mäkelä, Jukka Seppälä, Simo-Matti Siiriä, Ken Stenbäck, Juha-Pekka Tuovinen, Pasi Ylöstalo, and Lauri Laakso
Biogeosciences, 21, 4341–4359, https://doi.org/10.5194/bg-21-4341-2024, https://doi.org/10.5194/bg-21-4341-2024, 2024
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The exchange of CO2 between the sea and the atmosphere was studied in the Archipelago Sea, Baltic Sea, in 2017–2021, using an eddy covariance technique. The sea acted as a net source of CO2 with an average yearly emission of 27.1 gC m-2 yr-1, indicating that the marine ecosystem respired carbon that originated elsewhere. The yearly CO2 emission varied between 18.2–39.2 gC m-2 yr-1, mostly due to the yearly variation of ecosystem carbon uptake.
Ralf C. H. Aben, Daniël van de Craats, Jim Boonman, Stijn H. Peeters, Bart Vriend, Coline C. F. Boonman, Ype van der Velde, Gilles Erkens, and Merit van den Berg
Biogeosciences, 21, 4099–4118, https://doi.org/10.5194/bg-21-4099-2024, https://doi.org/10.5194/bg-21-4099-2024, 2024
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Drained peatlands cause high CO2 emissions. We assessed the effectiveness of subsurface water infiltration systems (WISs) in reducing CO2 emissions related to increases in water table depth (WTD) on 12 sites for up to 4 years. Results show WISs markedly reduced emissions by 2.1 t CO2-C ha-1 yr-1. The relationship between the amount of carbon above the WTD and CO2 emission was stronger than the relationship between WTD and emission. Long-term monitoring is crucial for accurate emission estimates.
Ingeborg Bussmann, Eric P. Achterberg, Holger Brix, Nicolas Brüggemann, Götz Flöser, Claudia Schütze, and Philipp Fischer
Biogeosciences, 21, 3819–3838, https://doi.org/10.5194/bg-21-3819-2024, https://doi.org/10.5194/bg-21-3819-2024, 2024
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Methane (CH4) is an important greenhouse gas and contributes to climate warming. However, the input of CH4 from coastal areas to the atmosphere is not well defined. Dissolved and atmospheric CH4 was determined at high spatial resolution in or above the North Sea. The atmospheric CH4 concentration was mainly influenced by wind direction. With our detailed study on the spatial distribution of CH4 fluxes we were able to provide a detailed and more realistic estimation of coastal CH4 fluxes.
Niu Zhu, Jinniu Wang, Dongliang Luo, Xufeng Wang, Cheng Shen, and Ning Wu
Biogeosciences, 21, 3509–3522, https://doi.org/10.5194/bg-21-3509-2024, https://doi.org/10.5194/bg-21-3509-2024, 2024
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Our study delves into the vital role of subalpine forests in the Qinghai–Tibet Plateau as carbon sinks in the context of climate change. Utilizing advanced eddy covariance systems, we uncover their significant carbon sequestration potential, observing distinct seasonal patterns influenced by temperature, humidity, and radiation. Notably, these forests exhibit robust carbon absorption, with potential implications for global carbon balance.
Colette L. Kelly, Nicole M. Travis, Pascale Anabelle Baya, Claudia Frey, Xin Sun, Bess B. Ward, and Karen L. Casciotti
Biogeosciences, 21, 3215–3238, https://doi.org/10.5194/bg-21-3215-2024, https://doi.org/10.5194/bg-21-3215-2024, 2024
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Nitrous oxide, a potent greenhouse gas, accumulates in regions of the ocean that are low in dissolved oxygen. We used a novel combination of chemical tracers to determine how nitrous oxide is produced in one of these regions, the eastern tropical North Pacific Ocean. Our experiments showed that the two most important sources of nitrous oxide under low-oxygen conditions are denitrification, an anaerobic process, and a novel “hybrid” process performed by ammonia-oxidizing archaea.
Hella van Asperen, Thorsten Warneke, Alessandro Carioca de Araújo, Bruce Forsberg, Sávio José Filgueiras Ferreira, Thomas Röckmann, Carina van der Veen, Sipko Bulthuis, Leonardo Ramos de Oliveira, Thiago de Lima Xavier, Jailson da Mata, Marta de Oliveira Sá, Paulo Ricardo Teixeira, Julie Andrews de França e Silva, Susan Trumbore, and Justus Notholt
Biogeosciences, 21, 3183–3199, https://doi.org/10.5194/bg-21-3183-2024, https://doi.org/10.5194/bg-21-3183-2024, 2024
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Carbon monoxide (CO) is regarded as an important indirect greenhouse gas. Soils can emit and take up CO, but, until now, uncertainty remains as to which process dominates in tropical rainforests. We present the first soil CO flux measurements from a tropical rainforest. Based on our observations, we report that tropical rainforest soils are a net source of CO. In addition, we show that valley streams and inundated areas are likely additional hot spots of CO in the ecosystem.
Yélognissè Agbohessou, Claire Delon, Manuela Grippa, Eric Mougin, Daouda Ngom, Espoir Koudjo Gaglo, Ousmane Ndiaye, Paulo Salgado, and Olivier Roupsard
Biogeosciences, 21, 2811–2837, https://doi.org/10.5194/bg-21-2811-2024, https://doi.org/10.5194/bg-21-2811-2024, 2024
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Emissions of greenhouse gases in the Sahel are not well represented because they are considered weak compared to the rest of the world. However, natural areas in the Sahel emit carbon dioxide and nitrous oxides, which need to be assessed because of extended surfaces. We propose an assessment of such emissions in Sahelian silvopastoral systems and of how they are influenced by environmental characteristics. These results are essential to inform climate change strategies in the region.
Merit van den Berg, Thomas M. Gremmen, Renske J. E. Vroom, Jacobus van Huissteden, Jim Boonman, Corine J. A. van Huissteden, Ype van der Velde, Alfons J. P. Smolders, and Bas P. van de Riet
Biogeosciences, 21, 2669–2690, https://doi.org/10.5194/bg-21-2669-2024, https://doi.org/10.5194/bg-21-2669-2024, 2024
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Drained peatlands emit 3 % of the global greenhouse gas emissions. Paludiculture is a way to reduce CO2 emissions while at the same time generating an income for landowners. The side effect is the potentially high methane emissions. We found very high methane emissions for broadleaf cattail compared with narrowleaf cattail and water fern. The rewetting was, however, effective to stop CO2 emissions for all species. The highest potential to reduce greenhouse gas emissions had narrowleaf cattail.
Antonio Donateo, Daniela Famulari, Donato Giovannelli, Arturo Mariani, Mauro Mazzola, Stefano Decesari, and Gianluca Pappaccogli
EGUsphere, https://doi.org/10.5194/egusphere-2024-1440, https://doi.org/10.5194/egusphere-2024-1440, 2024
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This study focuses on direct measurements of CO2 and CH4 turbulent eddy covariance fluxes in tundra ecosystems in the Svalbard Islands over a two-year period. Our results reveal dynamic interactions between climatic conditions and ecosystem activities such as photosynthesis and microbial activity. The observed net summertime methane uptake is correlated with the activation and aeration of soil microorganisms. High temperature anomalies increase CO2 and CH4 emissions.
Thomas Bauduin, Nathalie Gypens, and Alberto V. Borges
EGUsphere, https://doi.org/10.5194/egusphere-2024-1315, https://doi.org/10.5194/egusphere-2024-1315, 2024
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Greenhouse gases (GHG) emissions from ponds can vary depending on the state of ponds (clear-water with macrophytes or turbid-water with phytoplankton). We studied CO2, CH4, and N2O emissions in clear and turbid urban ponds (June 2021 to December 2023) in Brussels. We observed seasonal differences in methanogenesis pathways, in CH4 emissions between clear and turbid ponds, and annual differences in total emissions of GHG, likely from intense El Niño event in 2023.
Thea H. Heimdal, Galen A. McKinley, Adrienne J. Sutton, Amanda R. Fay, and Lucas Gloege
Biogeosciences, 21, 2159–2176, https://doi.org/10.5194/bg-21-2159-2024, https://doi.org/10.5194/bg-21-2159-2024, 2024
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Measurements of ocean carbon are limited in time and space. Machine learning algorithms are therefore used to reconstruct ocean carbon where observations do not exist. Improving these reconstructions is important in order to accurately estimate how much carbon the ocean absorbs from the atmosphere. In this study, we find that a small addition of observations from the Southern Ocean, obtained by autonomous sampling platforms, could significantly improve the reconstructions.
Guilherme L. Torres Mendonça, Julia Pongratz, and Christian H. Reick
Biogeosciences, 21, 1923–1960, https://doi.org/10.5194/bg-21-1923-2024, https://doi.org/10.5194/bg-21-1923-2024, 2024
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We study the timescale dependence of airborne fraction and underlying feedbacks by a theory of the climate–carbon system. Using simulations we show the predictive power of this theory and find that (1) this fraction generally decreases for increasing timescales and (2) at all timescales the total feedback is negative and the model spread in a single feedback causes the spread in the airborne fraction. Our study indicates that those are properties of the system, independently of the scenario.
François Clayer, Jan Erik Thrane, Kuria Ndungu, Andrew King, Peter Dörsch, and Thomas Rohrlack
Biogeosciences, 21, 1903–1921, https://doi.org/10.5194/bg-21-1903-2024, https://doi.org/10.5194/bg-21-1903-2024, 2024
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Determination of dissolved greenhouse gas (GHG) in freshwater allows us to estimate GHG fluxes. Mercuric chloride (HgCl2) is used to preserve water samples prior to GHG analysis despite its environmental and health impacts and interferences with water chemistry in freshwater. Here, we tested the effects of HgCl2, two substitutes and storage time on GHG in water from two boreal lakes. Preservation with HgCl2 caused overestimation of CO2 concentration with consequences for GHG flux estimation.
Helena Rautakoski, Mika Korkiakoski, Jarmo Mäkelä, Markku Koskinen, Kari Minkkinen, Mika Aurela, Paavo Ojanen, and Annalea Lohila
Biogeosciences, 21, 1867–1886, https://doi.org/10.5194/bg-21-1867-2024, https://doi.org/10.5194/bg-21-1867-2024, 2024
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Current and future nitrous oxide (N2O) emissions are difficult to estimate due to their high variability in space and time. Several years of N2O fluxes from drained boreal peatland forest indicate high importance of summer precipitation, winter temperature, and snow conditions in controlling annual N2O emissions. The results indicate increasing year-to-year variation in N2O emissions in changing climate with more extreme seasonal weather conditions.
Matthias Koschorreck, Norbert Kamjunke, Uta Koedel, Michael Rode, Claudia Schuetze, and Ingeborg Bussmann
Biogeosciences, 21, 1613–1628, https://doi.org/10.5194/bg-21-1613-2024, https://doi.org/10.5194/bg-21-1613-2024, 2024
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We measured the emission of carbon dioxide (CO2) and methane (CH4) from different sites at the river Elbe in Germany over 3 days to find out what is more important for quantification: small-scale spatial variability or diurnal temporal variability. We found that CO2 emissions were very different between day and night, while CH4 emissions were more different between sites. Dried out river sediments contributed to CO2 emissions, while the side areas of the river were important CH4 sources.
Odysseas Sifounakis, Edwin Haas, Klaus Butterbach-Bahl, and Maria P. Papadopoulou
Biogeosciences, 21, 1563–1581, https://doi.org/10.5194/bg-21-1563-2024, https://doi.org/10.5194/bg-21-1563-2024, 2024
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We performed a full assessment of the carbon and nitrogen cycles of a cropland ecosystem. An uncertainty analysis and quantification of all carbon and nitrogen fluxes were deployed. The inventory simulations include greenhouse gas emissions of N2O, NH3 volatilization and NO3 leaching from arable land cultivation in Greece. The inventory also reports changes in soil organic carbon and nitrogen stocks in arable soils.
Sarah M. Ludwig, Luke Schiferl, Jacqueline Hung, Susan M. Natali, and Roisin Commane
Biogeosciences, 21, 1301–1321, https://doi.org/10.5194/bg-21-1301-2024, https://doi.org/10.5194/bg-21-1301-2024, 2024
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Landscapes are often assumed to be homogeneous when using eddy covariance fluxes, which can lead to biases when calculating carbon budgets. In this study we report eddy covariance carbon fluxes from heterogeneous tundra. We used the footprints of each flux observation to unmix the fluxes coming from components of the landscape. We identified and quantified hot spots of carbon emissions in the landscape. Accurately scaling with landscape heterogeneity yielded half as much regional carbon uptake.
Justine Trémeau, Beñat Olascoaga, Leif Backman, Esko Karvinen, Henriikka Vekuri, and Liisa Kulmala
Biogeosciences, 21, 949–972, https://doi.org/10.5194/bg-21-949-2024, https://doi.org/10.5194/bg-21-949-2024, 2024
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We studied urban lawns and meadows in the Helsinki metropolitan area, Finland. We found that meadows are more resistant to drought events but that they do not increase carbon sequestration compared with lawns. Moreover, the transformation from lawns to meadows did not demonstrate any negative climate effects in terms of greenhouse gas emissions. Even though social and economic aspects also steer urban development, these results can guide planning to consider carbon-smart options.
Guantao Chen, Edzo Veldkamp, Muhammad Damris, Bambang Irawan, Aiyen Tjoa, and Marife D. Corre
Biogeosciences, 21, 513–529, https://doi.org/10.5194/bg-21-513-2024, https://doi.org/10.5194/bg-21-513-2024, 2024
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We established an oil palm management experiment in a large-scale oil palm plantation in Jambi, Indonesia. We recorded oil palm fruit yield and measured soil CO2, N2O, and CH4 fluxes. After 4 years of treatment, compared with conventional fertilization with herbicide weeding, reduced fertilization with mechanical weeding did not reduce yield and soil greenhouse gas emissions, which highlights the legacy effects of over a decade of conventional management prior to the start of the experiment.
Elizabeth Gachibu Wangari, Ricky Mwangada Mwanake, Tobias Houska, David Kraus, Gretchen Maria Gettel, Ralf Kiese, Lutz Breuer, and Klaus Butterbach-Bahl
Biogeosciences, 20, 5029–5067, https://doi.org/10.5194/bg-20-5029-2023, https://doi.org/10.5194/bg-20-5029-2023, 2023
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Agricultural landscapes act as sinks or sources of the greenhouse gases (GHGs) CO2, CH4, or N2O. Various physicochemical and biological processes control the fluxes of these GHGs between ecosystems and the atmosphere. Therefore, fluxes depend on environmental conditions such as soil moisture, soil temperature, or soil parameters, which result in large spatial and temporal variations of GHG fluxes. Here, we describe an example of how this variation may be studied and analyzed.
Laurie C. Menviel, Paul Spence, Andrew E. Kiss, Matthew A. Chamberlain, Hakase Hayashida, Matthew H. England, and Darryn Waugh
Biogeosciences, 20, 4413–4431, https://doi.org/10.5194/bg-20-4413-2023, https://doi.org/10.5194/bg-20-4413-2023, 2023
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As the ocean absorbs 25% of the anthropogenic emissions of carbon, it is important to understand the impact of climate change on the flux of carbon between the ocean and the atmosphere. Here, we use a very high-resolution ocean, sea-ice, carbon cycle model to show that the capability of the Southern Ocean to uptake CO2 has decreased over the last 40 years due to a strengthening and poleward shift of the southern hemispheric westerlies. This trend is expected to continue over the coming century.
Cited articles
Abrams, M., Tsu, H., Hulley, G., Iwao, K., Pieri, D., Cudahy, T., and Kargel,
J.: 2015. The advanced spaceborne thermal emission and reflection radiometer
(ASTER) after fifteen years: review of global products, Int. J. Appl. Earth
Obs., 38, 292–301, https://doi.org/10.1016/j.jag.2015.01.013, 2015.
Ainsworth, E. A. and Long, S. P.: What have we learned from 15 years of
free-air CO2 enrichment (FACE)? A meta-analytic review of the
responses of photosynthesis, canopy properties and plant production to rising
CO2, New Phytol., 165, 351–372,
https://doi.org/10.1111/j.1469-8137.2004.01224.x, 2005.
Aiuppa, A., Caleca, A., Federico, C., Gurrieri, S., and Valenza, M.: Diffuse
degassing of carbon dioxide at Somma–Vesuvius volcanic complex (Southern
Italy) and its relation with regional tectonics, J. Volcanol. Geotherm. Res.,
133, 55–79, https://doi.org/10.1016/S0377-0273(03)00391-3, 2004.
Alvarado, G. E., Carr, M. J., Turrin, B. D., Swisher, C. C., Schmincke,
H.-U., and Hudnut, K. W.: Recent volcanic history of Irazú volcano, Costa
Rica: Alternation and mixing of two magma batches, and pervasive mixing, in:
Special Paper 412, Volcanic Hazards in Central America, vol. 412, Geological
Society of America, 259–276, 2006.
Baker, N. R. and Oxborough, K.: Chlorophyll Fluorescence as a Probe of
Photosynthetic Productivity, in: Chlorophyll a Fluorescence, Springer,
Dordrecht, 65–82, 2004.
Barquero, R., Lesage, P., Metaxian, J. P., Creusot, A., and Fernández,
M.: La crisis sísmica en el volcán Irazú en 1991 (Costa Rica),
Rev. Geológica América Cent., 18, 5–18,
https://doi.org/10.15517/rgac.v0i18.13494, 1995.
Belikov, D. A., Maksyutov, S., Yaremchuk, A., Ganshin, A., Kaminski, T.,
Blessing, S., Sasakawa, M., Gomez-Pelaez, A. J., and Starchenko, A.: Adjoint
of the global Eulerian–Lagrangian coupled atmospheric transport model
(A-GELCA v1.0): development and validation, Geosci. Model Dev., 9, 749–764,
https://doi.org/10.5194/gmd-9-749-2016, 2016.
Biondi, F. and Fessenden, J. E.: Response of lodgepole pine growth to
CO2 degassing at Mammoth Mountain, California, Ecol. Brooklyn, 80,
2420–2426, 1999.
Burton, M. R., Sawyer, G. M., and Granieri, D.: Deep Carbon Emissions from
Volcanoes, Rev. Mineral. Geochem., 75, 323–354, https://doi.org/10.2138/rmg.2013.75.11,
2013.
Camarda, M., Gurrieri, S., and Valenza, M.: CO2 flux measurements
in volcanic areas using the dynamic concentration method: Influence of soil
permeability, J. Geophys. Res.-Sol. Ea., 111, B05202,
https://doi.org/10.1029/2005JB003898, 2006.
Camarda, M., De Gregorio, S., and Gurrieri, S.: Magma-ascent processes during
2005–2009 at Mt Etna inferred by soil CO2 emissions in peripheral
areas of the volcano, Chem. Geol., 330/331, 218–227,
https://doi.org/10.1016/j.chemgeo.2012.08.024, 2012.
Campion, R., Salerno, G. G., Coheur, P.-F., Hurtmans, D., Clarisse, L.,
Kazahaya, K., Burton, M., Caltabiano, T., Clerbaux, C., and Bernard, A.:
Measuring volcanic degassing of SO2 in the lower troposphere with
ASTER band ratios, J. Volcanol. Geotherm. Res., 194, 42–54,
https://doi.org/10.1016/j.jvolgeores.2010.04.010, 2010.
Cardellini, C., Chiodini, G., and Frondini, F.: Application of stochastic
simulation to CO2 flux from soil: Mapping and quantification of gas
release, J. Geophys. Res.-Sol. Ea., 108, 2425, https://doi.org/10.1029/2002JB002165,
2003.
Cawse-Nicholson, K., Fisher, J. B., Famiglietti, C. A., Braverman, A.,
Schwandner, F. M., Lewicki, J. L., Townsend, P. A., Schimel, D. S., Pavlick,
R., Bormann, K. J., Ferraz, A., Kang, E. L., Ma, P., Bogue, R. R., Youmans,
T., and Pieri, D. C.: Ecosystem responses to elevated CO2 using
airborne remote sensing at Mammoth Mountain, California, Biogeosciences, 15,
7403–7418, https://doi.org/10.5194/bg-15-7403-2018, 2018.
Chiodini, G., Cioni, R., Guidi, M., Raco, B., and Marini, L.: Soil
CO2 flux measurements in volcanic and geothermal areas, Appl.
Geochem., 13, 543–552, https://doi.org/10.1016/S0883-2927(97)00076-0, 1998.
Cook, A. C., Hainsworth, L. J., Sorey, M. L., Evans, W. C., and Southon, J.
R.: Radiocarbon studies of plant leaves and tree rings from Mammoth Mountain,
CA: a long-term record of magmatic CO2 release, Chem. Geol., 177,
117–131, 2001.
Cox, P., Pearson, D., B Booth, B., Friedlingstein, P., Huntingford, C.,
Jones, C., and M Luke, C.: Sensitivity of tropical carbon to climate change
constrained by carbon dioxide variability, Nature, 494, 341–344, 2013.
D'Arcy, F., Stix, J., de Moor, J., Rüdiger, J., Diaz, J., Alan, A., and
Corrales, E.: Drones Swoop in to Measure Gas Belched from Volcanoes, Eos, 99,
doi:10.1029/2018EO102329, 2018.
Delmelle, P. and Stix, J.: Volcanic Gases, edited by: Sigurdsson, H.,
Houghton, B., Rymer, H., Stix, J., and McNutt, S.: Encylopedia Volcanoes, 1st
Edn., Academic Press, San Diego, ISBN: 9780126431407, 803–815, 2000.
Dietrich, V. J., Fiebig, J., Chiodini, G., and Schwandner, F. M.: Fluid
Geochemistry of the Hydrothermal System, in: Nisyros Volcano, edited by:
Dietrich, V. J., Lagios, E., and Bachmann, O., Springer, Berlin, p. 339,
2016.
Eatough, D. J., Caka, F. M. and Farber, R. J.: The Conversion of SO2
to Sulfate in the Atmosphere, Israel J. Chem., 34, 301–314,
https://doi.org/10.1002/ijch.199400034, 1994.
Eckhardt, S., Cassiani, M., Evangeliou, N., Sollum, E., Pisso, I., and Stohl,
A.: Source–receptor matrix calculation for deposited mass with the
Lagrangian particle dispersion model FLEXPART v10.2 in backward mode, Geosci.
Model Dev., 10, 4605–4618, https://doi.org/10.5194/gmd-10-4605-2017, 2017.
Epiard, M., Avard, G., de Moor, J. M., Martínez Cruz, M., Barrantes
Castillo, G., and Bakkar, H.: Relationship between Diffuse CO2
Degassing and Volcanic Activity. Case Study of the Poás, Irazú, and
Turrialba Volcanoes, Costa Rica, Front. Earth Sci., 5, 14 pp.,
https://doi.org/10.3389/feart.2017.00071, 2017.
Evans, W. C., Bergfeld, D., McGeehin, J. P., King, J. C., and Heasler, H.:
Tree-ring 14C links seismic swarm to CO2 spike at
Yellowstone, USA, Geology, 38, 1075–1078, 2010.
Farrar, C. D., Sorey, M. L., Evans, W. C., Howle, J. F., Kerr, B. D.,
Kennedy, B. M., King, C.-Y., and Southon, J. R.: Forest-killing diffuse
CO2 emission at Mammoth Mountain as a sign of magmatic unrest,
Nature, 376, 675–678, https://doi.org/10.1038/376675a0, 1995.
Friedlingstein, P., Meinshausen, M., Arora, V. K., Jones, C. D., Anav, A.,
Liddicoat, S. K., and Knutti, R.: Uncertainties in CMIP5 Climate Projections
due to Carbon Cycle Feedbacks, J. Clim., 27, 511–526,
https://doi.org/10.1175/JCLI-D-12-00579.1, 2013.
Garten, C. T., Iversen, C. M., and Norby, R. J.: Litterfall 15N
abundance indicates declining soil nitrogen availability in a free-air
CO2 enrichment experiment, Ecology, 92, 133–139,
https://doi.org/10.1890/10-0293.1, 2011.
Giammanco, S., Gurrieri, S., and Valenza, M.: Soil CO2 degassing
along tectonic structures of Mount Etna (Sicily): the Pernicana fault, Appl.
Geochem., 12, 429–436, https://doi.org/10.1016/S0883-2927(97)00011-5, 1997.
Global Volcanism Program: Volcanoes of the World, v. 4.7.6., edited by:
Venzke, E., Smithson. Inst., https://doi.org/10.5479/si.GVP.VOTW4-2013 (last accessed:
20 February 2018), 2013.
Gregory, J. M., Jones, C. D., Cadule, P., and Friedlingstein, P.: Quantifying
Carbon Cycle Feedbacks, J. Clim., 22, 5232–5250, https://doi.org/10.1175/2009JCLI2949.1,
2009.
Hattenschwiler, S., Miglietta, F., Raschi, A., and Körner, C.: Thirty
years of in situ tree growth under elevated CO2: a model for future
forest responses?, Glob. Change Biol., 3, 463–471,
https://doi.org/10.1046/j.1365-2486.1997.00105.x, 1997.
Hebeisen, T., Lüscher, A., Zanetti, S., Fischer, B., Hartwig, U.,
Frehner, M., Hendrey, G., Blum, H., and Nösberger, J.: Growth response of
Trifolium repens L. and Lolium perenne L. as monocultures and bi-species
mixture to free air CO2 enrichment and management, Glob. Change
Biol., 3, 149–160, https://doi.org/10.1046/j.1365-2486.1997.00073.x, 1997.
Helle, G. and Schleser, G. H.: Beyond CO2-fixation by Rubisco – an
interpretation of 13C/12C variations in tree rings from novel
intra-seasonal studies on broad-leaf trees, Plant Cell Environ., 27,
367–380, https://doi.org/10.1111/j.0016-8025.2003.01159.x, 2004.
Houlié, N., Komorowski, J. C., de Michele, M., Kasereka, M., and Ciraba,
H.: Early detection of eruptive dykes revealed by normalized difference
vegetation index (NDVI) on Mt. Etna and Mt. Nyiragongo, Earth Planet. Sc.
Lett., 246, 231–240, https://doi.org/10.1016/j.epsl.2006.03.039, 2006.
Jenkins, M. W., Krofcheck, D. J., Teasdale, R., Houpis, J., and Pushnik, J.:
Exploring the edge of a natural disaster, Open Journal of Ecology, 2,
222–232, https://doi.org/10.4236/oje.2012.24026, 2012.
Kappelle, M., Geuze, T., Leal, M. E., and Cleef, A. M.: Successional age and
forest structure in a Costa Rican upper montane Quercus forest, J. Trop.
Ecol., 12, 681–698, https://doi.org/10.1017/S0266467400009871, 1996.
Kauwe, M. G. D., Keenan, T. F., Medlyn, B. E., Prentice, I. C., and Terrer,
C.: Satellite based estimates underestimate the effect of CO2
fertilization on net primary productivity, Nat. Clim. Change, 6, 892–893,
https://doi.org/10.1038/nclimate3105, 2016.
Keeling, C. D.: The Carbon Dioxide Cycle: Reservoir Models to Depict the
Exchange of Atmospheric Carbon Dioxide with the Oceans and Land Plants, in:
Chemistry of the Lower Atmosphere, edited by: Rasool, S. I., Springer US,
Boston, MA, 251–329, 1973.
Körner, C.: Carbon Flux and Growth in Mature Deciduous Forest Trees
Exposed to Elevated CO2, Science, 309, 1360–1362,
https://doi.org/10.1126/science.1113977, 2005.
Körner, C. and Miglietta, F.: Long term effects of naturally elevated
CO2 on mediterranean grassland and forest trees, Oecologia, 99,
343–351, https://doi.org/10.1007/BF00627748, 1994.
Lefevre, J.-C., Gillot, P.-Y., Cardellini, C., Gresse, M., Lesage, L.,
Chiodini, G., and Oberlin, C.: Use of the Radiocarbon Activity Deficit in
Vegetation as a Sensor of CO2 Soil Degassing: Example from La
Solfatara (Naples, Southern Italy), Radiocarbon, 60, 1–12,
https://doi.org/10.1017/RDC.2017.76, 2017.
Leigh, E. G., Losos, E. C., and Research, N. B. E.: Tropical forest diversity
and dynamism: findings from a large-scale network, Chicago, London, The
University of Chicago Press, available at:
http://trove.nla.gov.au/version/12851528 (last access: 25 September
2017), 2004.
Lewicki, J. L. and Hilley, G. E.: Multi-scale observations of the variability
of magmatic CO2 emissions, Mammoth Mountain, CA, USA, J. Volcanol.
Geotherm. Res., 284, 1–15, https://doi.org/10.1016/j.jvolgeores.2014.07.011, 2014.
Lewicki, J. L., Hilley, G. E., Shelly, D. R., King, J. C., McGeehin, J. P.,
Mangan, M., and Evans, W. C.: Crustal migration of CO2-rich
magmatic fluids recorded by tree-ring radiocarbon and seismicity at Mammoth
Mountain, CA, USA, Earth Planet. Sc. Lett., 390, 52–58,
https://doi.org/10.1016/j.epsl.2013.12.035, 2014.
Lüscher, A., Hartwig, U. A., Suter, D., and Nösberger, J.: Direct
evidence that symbiotic N2 fixation in fertile grassland is an important
trait for a strong response of plants to elevated atmospheric CO2,
Glob. Change Biol., 6, 655–662, https://doi.org/10.1046/j.1365-2486.2000.00345.x, 2000.
Malowany, K. S., Stix, J., de Moor, J. M., Chu, K., Lacrampe-Couloume, G.,
and Sherwood Lollar, B.: Carbon isotope systematics of Turrialba volcano,
Costa Rica, using a portable cavity ring-down spectrometer, Geochem. Geophy.
Geosy., 18, 2769–2784, https://doi.org/10.1002/2017GC006856, 2017.
Martini, F., Tassi, F., Vaselli, O., Del Potro, R., Martinez, M., del Laat,
R. V., and Fernandez, E.: Geophysical, geochemical and geodetical signals of
reawakening at Turrialba volcano (Costa Rica) after almost 150 years of
quiescence, J. Volcanol. Geotherm. Res., 198, 416–432,
https://doi.org/10.1016/j.jvolgeores.2010.09.021, 2010.
Mason, E., Edmonds, M., and Turchyn, A. V.: Remobilization of crustal carbon
may dominate volcanic arc emissions, Science, 357, 290–294, 2017.
McGee, K. A. and Gerlach, T. M.: Annual cycle of magmatic CO2 in a
tree-kill soil at Mammoth Mountain, California: Implications for soil
acidification, Geology, 26, 463–466, 1998.
de Moor, J. M., Aiuppa, A., Avard, G., Wehrmann, H., Dunbar, N., Muller, C.,
Tamburello, G., Giudice, G., Liuzzo, M., Moretti, R., Conde, V., and Galle,
B.: Turmoil at Turrialba Volcano (Costa Rica): Degassing and eruptive
processes inferred from high-frequency gas monitoring, J. Geophys. Res.-Sol.
Ea., 121, 2016JB013150, https://doi.org/10.1002/2016JB013150, 2016.
Newhall, C. G., Costa, F., Ratdomopurbo, A., Venezky, D. Y., Widiwijayanti,
C., Win, N. T. Z., Tan, K., and Fajiculay, E.: WOVOdat – An online, growing
library of worldwide volcanic unrest, J. Volcanol. Geotherm. Res., 345,
184–199, https://doi.org/10.1016/j.jvolgeores.2017.08.003, 2017.
Nicholson, E.: Volcanology: An Introduction, Larsen and Keller Education,
2017.
Norby, R. J., Warren, J. M., Iversen, C. M., Medlyn, B. E., and McMurtrie, R.
E.: CO2 enhancement of forest productivity constrained by limited
nitrogen availability, P. Natl. Acad. Sci. USA, 107, 19368–19373,
https://doi.org/10.1073/pnas.1006463107, 2010.
Norby, R. J., De Kauwe, M. G., Domingues, T. F., Duursma, R. A., Ellsworth,
D. S., Goll, D. S., Lapola, D. M., Luus, K. A., MacKenzie, A. R., Medlyn, B.
E., Pavlick, R., Rammig, A., Smith, B., Thomas, R., Thonicke, K., Walker, A.
P., Yang, X., and Zaehle, S.: Model–data synthesis for the next generation
of forest free-air CO2 enrichment (FACE) experiments, New Phytol.,
209, 17–28, https://doi.org/10.1111/nph.13593, 2016.
Norman, E. M.: Buddlejaceae (Flora Neotropica Monograph No. 81), The New York
Botanical Garden Press, 2000.
Oda, T. and Maksyutov, S.: A very high-resolution (1 km × 1 km)
global fossil fuel CO2 emission inventory derived using a point
source database and satellite observations of nighttime lights, Atmos. Chem.
Phys., 11, 543–556, https://doi.org/10.5194/acp-11-543-2011, 2011.
Oppenheimer, C. and Stevenson, D.: Liquid sulphur lakes at Poás volcano,
Nature, 342, 790–793, https://doi.org/10.1038/342790a0, 1989.
Ortega-Pieck, A., López-Barrera, F., Ramírez-Marcial, N., and
García-Franco, J. G.: Early seedling establishment of two tropical
montane cloud forest tree species: The role of native and exotic grasses,
Forest Ecol. Manag., 261, 1336–1343, https://doi.org/10.1016/j.foreco.2011.01.013, 2011.
Paoletti, E., Seufert, G., Della Rocca, G., and Thomsen, H.: Photosynthetic
responses to elevated CO2 and O3 in Quercus ilex
leaves at a natural CO2 spring, Environ. Pollut., 147, 516–524,
https://doi.org/10.1016/j.envpol.2006.08.039, 2007.
Parry, C., Blonquist, J. M., and Bugbee, B.: In situ measurement of leaf
chlorophyll concentration: analysis of the optical/absolute relationship,
Plant Cell Environ., 37, 2508–2520, https://doi.org/10.1111/pce.12324, 2014.
Pasquier-Cardin, A., Allard, P., Ferreira, T., Hatte, C., Coutinho, R.,
Fontugne, M., and Jaudon, M.: Magma-derived CO2 emissions recorded in
14C and 13C content of plants growing in Furnas caldera, Azores, J. Volcanol.
Geotherm. Res., 92, 195–207, https://doi.org/10.1016/S0377-0273(99)00076-1, 1999.
Peiffer, L., Wanner, C., and Lewicki, J. L.: Unraveling the dynamics of
magmatic CO2 degassing at Mammoth Mountain, California, Earth
Planet. Sc. Lett., 484, 318–328, https://doi.org/10.1016/j.epsl.2017.12.038, 2018.
Pérez, N. M., Hernández, P. A., Padilla, G., Nolasco, D., Barrancos,
J., Melían, G., Padrón, E., Dionis, S., Calvo, D., Rodríguez,
F., Notsu, K., Mori, T., Kusakabe, M., Arpa, M. C., Reniva, P., and Ibarra,
M.: Global CO2 emission from volcanic lakes, Geology, 39, 235–238,
https://doi.org/10.1130/G31586.1, 2011.
Pieri, D., Schwandner, F. M., Realmuto, V. J., Lundgren, P. R., Hook, S.,
Anderson, K., Buongiorno, M. F., Diaz, J. A., Gillespie, A., Miklius, A.,
Mothes, P., Mouginis-Mark, P., Pallister, M., Poland, M., Palgar, L. L.,
Pata, F., Pritchard, M., Self, S., Sigmundsson, F., de Silva, S., and Webley,
P.: Enabling a global perspective for deterministic modeling of volcanic
unrest, available at:
https://hyspiri.jpl.nasa.gov/downloads/
(last access: 20 February 2018), 2016.
Pinkard, E. A., Beadle, C. L., Mendham, D. S., Carter, J., and Glen, M.:
Determining photosynthetic responses of forest species to elevated
CO2: alternatives to FACE, Forest Ecol. Manag., 260, 1251–1261,
2010.
Pyle, D. M.: What Can We Learn from Records of Past Eruptions to Better
Prepare for the Future?, in: SpringerLink, Springer, Berlin, Heidelberg,
1–18, 2017.
Quintana-Ascencio, P. F., Ramírez-Marcial, N., González-Espinosa,
M., and Martínez-Icó, M.: Sapling survival and growth of coniferous
and broad-leaved trees in successional highland habitats in Mexico, Appl.
Veg. Sci., 7, 81–88, 2004.
Rizzo, A. L., Di Piazza, A., de Moor, J. M., Alvarado, G. E., Avard, G.,
Carapezza, M. L., and Mora, M. M.: Eruptive activity at Turrialba volcano
(Costa Rica): Inferences from 3He∕4He in fumarole gases and
chemistry of the products ejected during 2014 and 2015, Geochem. Geophy.
Geosy., 17, 4478–4494, https://doi.org/10.1002/2016GC006525, 2016.
Saban, J. M., Chapman, M. A., and Taylor, G.: FACE facts hold for multiple
generations, Evidence from natural CO2 springs, Glob. Change Biol., 25,
1–11, https://doi.org/10.1111/gcb.14437, 2019.
Saha, S., Moorthi, S., Pan, H.-L., Wu, X., Wang, J., Nadiga, S., Tripp, P.,
Kistler, R., Woollen, J., Behringer, D., Liu, H., Stokes, D., Grumbine, R.,
Gayno, G., Wang, J., Hou, Y.-T., Chuang, H., Juang, H.-M. H., Sela, J.,
Iredell, M., Treadon, R., Kleist, D., Van Delst, P., Keyser, D., Derber, J.,
Ek, M., Meng, J., Wei, H., Yang, R., Lord, S., van den Dool, H., Kumar, A.,
Wang, W., Long, C., Chelliah, M., Xue, Y., Huang, B., Schemm, J.-K.,
Ebisuzaki, W., Lin, R., Xie, P., Chen, M., Zhou, S., Higgins, W., Zou, C.-Z.,
Liu, Q., Chen, Y., Han, Y., Cucurull, L., Reynolds, R. W., Rutledge, G., and
Goldberg, M.: NCEP Climate Forecast System Reanalysis (CFSR) 6-hourly
Products, January 1979 to December 2010, Bull. Am. Meteorol. Soc., 91,
1015–1058, https://doi.org/10.5065/D69K487J, 2010a.
Saha, S., Moorthi, S., Pan, H.-L., Wu, X., Wang, J., Nadiga, S., Tripp, P.,
Kistler, R., Woollen, J., Behringer, D., Liu, H., Stokes, D., Grumbine, R.,
Gayno, G., Wang, J., Hou, Y.-T., Chuang, H., Juang, H.-M. H., Sela, J.,
Iredell, M., Treadon, R., Kleist, D., Van Delst, P., Keyser, D., Derber, J.,
Ek, M., Meng, J., Wei, H., Yang, R., Lord, S., van den Dool, H., Kumar, A.,
Wang, W., Long, C., Chelliah, M., Xue, Y., Huang, B., Schemm, J.-K.,
Ebisuzaki, W., Lin, R., Xie, P., Chen, M., Zhou, S., Higgins, W., Zou, C.-Z.,
Liu, Q., Chen, Y., Han, Y., Cucurull, L., Reynolds, R. W., Rutledge, G., and
Goldberg, M.: The NCEP Climate Forecast System Reanalysis, Bull. Am.
Meteorol. Soc., 91, 1015–1058, https://doi.org/10.1175/2010BAMS3001.1, 2010b.
Saurer, M., Cherubini, P., Bonani, G., and Siegwolf, R.: Tracing carbon
uptake from a natural CO2 spring into tree rings: an isotope
approach, Tree Physiol., 23, 997–1004, https://doi.org/10.1093/treephys/23.14.997, 2003.
Schimel, D., Stephens, B. B., and Fisher, J. B.: Effect of increasing
CO2 on the terrestrial carbon cycle, P. Natl. Acad. Sci. USA, 112,
436–441, https://doi.org/10.1073/pnas.1407302112, 2015.
Schwandner, F. M., Seward, T. M., Gize, A. P., Hall, P. A., and Dietrich, V.
J.: Diffuse emission of organic trace gases from the flank and crater of a
quiescent active volcano (Vulcano, Aeolian Islands, Italy), J. Geophys.
Res.-Atmos., 109, D04301, https://doi.org/10.1029/2003JD003890, 2004.
Schwandner, F. M., Gunson, M. R., Miller, C. E., Carn, S. A., Eldering, A.,
Krings, T., Verhulst, K. R., Schimel, D. S., Nguyen, H. M., Crisp, D.,
O'Dell, C. W., Osterman, G. B., Iraci, L. T., and Podolske, J. R.: Spaceborne
detection of localized carbon dioxide sources, Science, 358, eaam5782,
https://doi.org/10.1126/science.aam5782, 2017.
Seiler, R., Kirchner, J. W., Krusic, P. J., Tognetti, R., Houlié, N.,
Andronico, D., Cullotta, S., Egli, M., D'Arrigo, R., and Cherubini, P.:
Insensitivity of Tree-Ring Growth to Temperature and Precipitation Sharpens
the Puzzle of Enhanced Pre-Eruption NDVI on Mt. Etna (Italy), PLOS ONE, 12,
e0169297, https://doi.org/10.1371/journal.pone.0169297, 2017.
Sharma, S. and Williams, D.: Carbon and oxygen isotope analysis of leaf
biomass reveals contrasting photosynthetic responses to elevated
CO2 near geologic vents in Yellowstone National Park,
Biogeosciences, 6, 25–31, https://doi.org/10.5194/bg-6-25-2009, 2009.
Shinohara, H., Aiuppa, A., Giudice, G., Gurrieri, S., and Liuzzo, M.:
Variation of H2O/CO2 and CO2/SO2
ratios of volcanic gases discharged by continuous degassing of Mount Etna
volcano, Italy, J. Geophys. Res.-Sol. Ea., 113, B09203,
https://doi.org/10.1029/2007JB005185, 2008.
Sinclair, A. J.: Selection of threshold values in geochemical data using
probability graphs, J. Geochem. Explor., 3, 129–149,
https://doi.org/10.1016/0375-6742(74)90030-2, 1974.
Sorey, M. L., Evans, W. C., Kennedy, B. M., Farrar, C. D., Hainsworth, L. J.,
and Hausback, B.: Carbon dioxide and helium emissions from a reservoir of
magmatic gas beneath Mammoth Mountain, California, J. Geophys. Res.-Sol. Ea.,
103, 15303–15323, https://doi.org/10.1029/98JB01389, 1998.
Sparks, R. S. J., Biggs, J., and Neuberg, J. W.: Monitoring Volcanoes,
Science, 335, 1310–1311, https://doi.org/10.1126/science.1219485, 2012.
Staebler, R. M. and Fitzjarrald, D. R.: Observing subcanopy CO2
advection, Agr. Forest Meteorol., 122, 139–156,
https://doi.org/10.1016/j.agrformet.2003.09.011, 2004.
Stine, C. M. and Banks, N. G.: Costa Rica Volcano Profile, USGS Numbered
Series, US Geological Survey, available at:
https://pubs.er.usgs.gov/publication/ofr91591 (last access:
20 February 2019), 1991.
Stohl, A. and Thomson, D. J.: A Density Correction for Lagrangian Particle
Dispersion Models, Bound.-Lay. Meteorol., 90, 155–167,
https://doi.org/10.1023/A:1001741110696, 1999.
Stohl, A., Hittenberger, M., and Wotawa, G.: Validation of the Lagrangian
particle dispersion model FLEXPART against large-scale tracer experiment
data, Atmos. Environ., 32, 4245–4264, 1998.
Stohl, A., Forster, C., Frank, A., Seibert, P., and Wotawa, G.: Technical
note: The Lagrangian particle dispersion model FLEXPART version 6.2, Atmos.
Chem. Phys., 5, 2461–2474, https://doi.org/10.5194/acp-5-2461-2005, 2005.
Symonds, R. B., Gerlach, T. M., and Reed, M. H.: Magmatic gas scrubbing:
implications for volcano monitoring, J. Volcanol. Geotherm. Res., 108,
303–341, https://doi.org/10.1016/S0377-0273(00)00292-4, 2001.
Tanner, E. V. J., Vitousek, P. M., and Cuevas, E.: Experimental Investigation
of Nutrient Limitation of Forest Growth on Wet Tropical Mountains, Ecology,
79, 10–22, 1998.
Tercek, M. T., Al-Niemi, T. S., and Stout, R. G.: Plants Exposed to High
Levels of Carbon Dioxide in Yellowstone National Park: A Glimpse into the
Future?, Yellowstone Sci., 16, 12–19, 2008.
Thomas, C. K.: Variability of Sub-Canopy Flow, Temperature, and Horizontal
Advection in Moderately Complex Terrain, Bound.-Lay. Meteorol., 139, 61–81,
https://doi.org/10.1007/s10546-010-9578-9, 2011.
Tognetti, R., Cherubini, P., and Innes, J. L.: Comparative stem-growth rates
of Mediterranean trees under background and naturally enhanced ambient
CO2 concentrations, New Phytol., 146, 59–74,
https://doi.org/10.1046/j.1469-8137.2000.00620.x, 2000.
Townsend, A. R., Cleveland, C. C., Houlton, B. Z., Alden, C. B., and White,
J. W.: Multi-element regulation of the tropical forest carbon cycle, Front.
Ecol. Environ., 9, 9–17, https://doi.org/10.1890/100047, 2011.
Verheyden, A., Helle, G., Schleser, G. H., Dehairs, F., Beeckman, H., and
Koedam, N.: Annual cyclicity in high-resolution stable carbon and oxygen
isotope ratios in the wood of the mangrove tree Rhizophora mucronata, Plant
Cell Environ., 27, 1525–1536, https://doi.org/10.1111/j.1365-3040.2004.01258.x, 2004.
Viveiros, F., Ferreira, T., Silva, C., and Gaspar, J.: Meteorological factors
controlling soil gases and indoor CO2 concentration: A permanent
risk in degassing areas, Sci. Total Environ., 407, 1362–1372,
https://doi.org/10.1016/j.scitotenv.2008.10.009, 2009.
Vodnik, D., Thomalla, A., Ferlan, M., Levanič, T., Eler, K., Ogrinc, N.,
Wittmann, C., and Pfanz, H.: Atmospheric and geogenic CO2 within the
crown and root of spruce (Picea abies L. Karst.) growing in a mofette area,
Atmos. Environ., 182, 286–295, https://doi.org/10.1016/j.atmosenv.2018.03.043, 2018.
Weng, C., Bush, M. B., and Chepstow-Lusty, A. J.: Holocene changes of Andean
alder (Alnus acuminata) in highland Ecuador and Peru, J. Quat. Sci., 19,
685–691, https://doi.org/10.1002/jqs.882, 2004.
Werner, C., Kelly, P. J., Doukas, M., Lopez, T., Pfeffer, M., McGimsey, R.,
and Neal, C.: Degassing of CO2, SO2, and H2S
associated with the 2009 eruption of Redoubt Volcano, Alaska, J. Volcanol.
Geotherm. Res., 259, 270–284, https://doi.org/10.1016/j.jvolgeores.2012.04.012, 2013.
Werner, C., Bergfeld, D., Farrar, C. D., Doukas, M. P., Kelly, P. J., and
Kern, C.: Decadal-scale variability of diffuse CO2 emissions and
seismicity revealed from long-term monitoring (1995–2013) at Mammoth
Mountain, California, USA, J. Volcanol. Geotherm. Res., 289, 51–63,
https://doi.org/10.1016/j.jvolgeores.2014.10.020, 2014.
Williams-Jones, G., Stix, J., Heiligmann, M., Charland, A., Lollar, B. S.,
Arner, N., Garzón, G. V., Barquero, J., and Fernandez, E.: A model of
diffuse degassing at three subduction-related volcanoes, Bull. Volcanol., 62,
130–142, 2000.
Short summary
This study examined rainforest responses to elevated CO2 coming from volcanoes in Costa Rica. Comparing tree species, we found that leaf function responded when exposed to increasing CO2 levels. The chemical signature of volcanic CO2 is different than background CO2. Trees exposed to volcanic CO2 also had chemical signatures which showed the influence of volcanic CO2: trees not only
breathe inand are made of volcanic CO2 but also retain that exposure history for decades.
This study examined rainforest responses to elevated CO2 coming from volcanoes in Costa Rica....
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