Articles | Volume 16, issue 14
https://doi.org/10.5194/bg-16-2873-2019
© 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-16-2873-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
31 Jul 2019
Research article |
| 31 Jul 2019
| 31 Jul 2019
El Niño–Southern Oscillation (ENSO) event reduces CO2 uptake of an Indonesian oil palm plantation
Christian Stiegler
CORRESPONDING AUTHOR
Bioclimatology, University of Göttingen, Göttingen, Germany
Ana Meijide
Agronomy Division, Department of Crop Sciences, University of
Göttingen, Göttingen, Germany
Yuanchao Fan
NORCE Norwegian Research Centre, Bjerknes Centre for Climate Research,
Bergen, Norway
Ashehad Ashween Ali
Bioclimatology, University of Göttingen, Göttingen, Germany
Tania June
Department of Geophysics and Meteorology, Bogor Agricultural
University, Bogor, Indonesia
Alexander Knohl
Bioclimatology, University of Göttingen, Göttingen, Germany
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Jelka Braden-Behrens, Lukas Siebicke, and Alexander Knohl
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Christian Markwitz, Alexander Knohl, and Lukas Siebicke
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Jelka Braden-Behrens, Yuan Yan, and Alexander Knohl
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Yiying Chen, James Ryder, Vladislav Bastrikov, Matthew J. McGrath, Kim Naudts, Juliane Otto, Catherine Ottlé, Philippe Peylin, Jan Polcher, Aude Valade, Andrew Black, Jan A. Elbers, Eddy Moors, Thomas Foken, Eva van Gorsel, Vanessa Haverd, Bernard Heinesch, Frank Tiedemann, Alexander Knohl, Samuli Launiainen, Denis Loustau, Jérôme Ogée, Timo Vessala, and Sebastiaan Luyssaert
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A. A. Ali, C. Xu, A. Rogers, R. A. Fisher, S. D. Wullschleger, E. C. Massoud, J. A. Vrugt, J. D. Muss, N. G. McDowell, J. B. Fisher, P. B. Reich, and C. J. Wilson
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We have developed a mechanistic model of leaf utilization of nitrogen for assimilation (LUNA V1.0) to predict the photosynthetic capacities at the global scale based on the optimization of key leaf-level metabolic processes. LUNA model predicts that future climatic changes would mostly affect plant photosynthetic capabilities in high-latitude regions and that Earth system models using fixed photosynthetic capabilities are likely to substantially overestimate future global photosynthesis.
A. Collalti, S. Marconi, A. Ibrom, C. Trotta, A. Anav, E. D'Andrea, G. Matteucci, L. Montagnani, B. Gielen, I. Mammarella, T. Grünwald, A. Knohl, F. Berninger, Y. Zhao, R. Valentini, and M. Santini
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The time series analysis of the main meteorological parameters and components of CO2 and H2O fluxes showed a high evapotranspiration (ET) and gross primary production (GPP) sensitivity of the tropical rainforest to meteorological variations caused by El Niño-Southern Oscillation (ENSO) events. Incoming solar radiation is the main governing factor that is responsible for ET and GPP variability. Changes in precipitation due to moderate ENSO events did not have any notable effect on ET and GPP.
L. Wingate, J. Ogée, E. Cremonese, G. Filippa, T. Mizunuma, M. Migliavacca, C. Moisy, M. Wilkinson, C. Moureaux, G. Wohlfahrt, A. Hammerle, L. Hörtnagl, C. Gimeno, A. Porcar-Castell, M. Galvagno, T. Nakaji, J. Morison, O. Kolle, A. Knohl, W. Kutsch, P. Kolari, E. Nikinmaa, A. Ibrom, B. Gielen, W. Eugster, M. Balzarolo, D. Papale, K. Klumpp, B. Köstner, T. Grünwald, R. Joffre, J.-M. Ourcival, M. Hellstrom, A. Lindroth, C. George, B. Longdoz, B. Genty, J. Levula, B. Heinesch, M. Sprintsin, D. Yakir, T. Manise, D. Guyon, H. Ahrends, A. Plaza-Aguilar, J. H. Guan, and J. Grace
Biogeosciences, 12, 5995–6015, https://doi.org/10.5194/bg-12-5995-2015, https://doi.org/10.5194/bg-12-5995-2015, 2015
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The timing of plant development stages and their response to climate and management were investigated using a network of digital cameras installed across different European ecosystems. Using the relative red, green and blue content of images we showed that the green signal could be used to estimate the length of the growing season in broadleaf forests. We also developed a model that predicted the seasonal variations of camera RGB signals and how they relate to leaf pigment content and area well.
A. Röll, F. Niu, A. Meijide, A. Hardanto, Hendrayanto, A. Knohl, and D. Hölscher
Biogeosciences, 12, 5619–5633, https://doi.org/10.5194/bg-12-5619-2015, https://doi.org/10.5194/bg-12-5619-2015, 2015
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The study provides first insight into eco-hydrological consequences of the continuing oil palm expansion in the tropics. Stand transpiration rates of some studied oil palm stands compared to or even exceeded values reported for tropical forests, indicating high water use of oil palms under certain conditions. Oil palm landscapes show some spatial variations in (evapo)transpiration rates, e.g. due to varying plantation age, but the day-to-day variability of oil palm transpiration is rather low.
J. Otto, D. Berveiller, F.-M. Bréon, N. Delpierre, G. Geppert, A. Granier, W. Jans, A. Knohl, A. Kuusk, B. Longdoz, E. Moors, M. Mund, B. Pinty, M.-J. Schelhaas, and S. Luyssaert
Biogeosciences, 11, 2411–2427, https://doi.org/10.5194/bg-11-2411-2014, https://doi.org/10.5194/bg-11-2411-2014, 2014
S. Burri, P. Sturm, U. E. Prechsl, A. Knohl, and N. Buchmann
Biogeosciences, 11, 961–975, https://doi.org/10.5194/bg-11-961-2014, https://doi.org/10.5194/bg-11-961-2014, 2014
W. Yuan, S. Liu, W. Cai, W. Dong, J. Chen, A. Arain, P. D. Blanken, A. Cescatti, G. Wohlfahrt, T. Georgiadis, L. Genesio, D. Gianelle, A. Grelle, G. Kiely, A. Knohl, D. Liu, M. Marek, L. Merbold, L. Montagnani, O. Panferov, M. Peltoniemi, S. Rambal, A. Raschi, A. Varlagin, and J. Xia
Geosci. Model Dev. Discuss., https://doi.org/10.5194/gmdd-6-5475-2013, https://doi.org/10.5194/gmdd-6-5475-2013, 2013
Revised manuscript not accepted
J. H. Shim, H. H. Powers, C. W. Meyer, A. Knohl, T. E. Dawson, W. J. Riley, W. T. Pockman, and N. McDowell
Biogeosciences, 10, 4937–4956, https://doi.org/10.5194/bg-10-4937-2013, https://doi.org/10.5194/bg-10-4937-2013, 2013
Related subject area
Biogeochemistry: Air - Land Exchange
Anticorrelation of net uptake of atmospheric CO2 by the world ocean and terrestrial biosphere in current carbon cycle models
Impact of meteorological conditions on the biogenic volatile organic compound (BVOC) emission rate from eastern Mediterranean vegetation under drought
Monitoring cropland daily carbon dioxide exchange at field scales with Sentinel-2 satellite imagery
Compound soil and atmospheric drought (CSAD) events and CO2 fluxes of a mixed deciduous forest: the occurrence, impact, and temporal contribution of main drivers
Similar freezing spectra of particles on plant canopies as in air at a high-altitude site
The influence of plant water stress on vegetation–atmosphere exchanges: implications for ozone modelling
High interspecific variability in ice nucleation activity suggests pollen ice nucleators are incidental
Using automated machine learning for the upscaling of gross primary productivity
Aggregation of ice-nucleating macromolecules from Betula pendula pollen determines ice nucleation efficiency
Interpretability of negative latent heat fluxes from eddy covariance measurements in dry conditions
Forest-floor respiration, N2O fluxes, and CH4 fluxes in a subalpine spruce forest: drivers and annual budgets
Enhanced net CO2 exchange of a semideciduous forest in the southern Amazon due to diffuse radiation from biomass burning
Evaluating adsorption isotherm models for determining the partitioning of ammonium between soil and soil-pore water in environmental soil samples
Observational relationships between ammonia, carbon dioxide and water vapor under a wide range of meteorological and turbulent conditions: RITA-2021 campaign
Environmental controls of winter soil carbon dioxide fluxes in boreal and tundra environments
Origin of secondary fatty alcohols in atmospheric aerosols in a cool–temperate forest based on their mass size distributions
Sap flow and leaf gas exchange response to a drought and heatwave in urban green spaces in a Nordic city
Changes in biogenic volatile organic compound emissions in response to the El Niño–Southern Oscillation
Rethinking the deployment of static chambers for CO2 flux measurement in dry desert soils
Lichen species across Alaska produce highly active and stable ice nucleators
A differentiable, physics-informed ecosystem modeling and learning framework for large-scale inverse problems: demonstration with photosynthesis simulations
Snow–vegetation–atmosphere interactions in alpine tundra
Synergy between TROPOMI sun-induced chlorophyll fluorescence and MODIS spectral reflectance for understanding the dynamics of gross primary productivity at Integrated Carbon Observatory System (ICOS) ecosystem flux sites
Atmospheric deposition of reactive nitrogen to a deciduous forest in the southern Appalachian Mountains
Tropical cyclones facilitate recovery of forest leaf area from dry spells in East Asia
Minor contributions of daytime monoterpenes are major contributors to atmospheric reactivity
Using atmospheric observations to quantify annual biogenic carbon dioxide fluxes on the Alaska North Slope
Forest–atmosphere exchange of reactive nitrogen in a remote region – Part II: Modeling annual budgets
Growth and actual leaf temperature modulate CO2 responsiveness of monoterpene emissions from holm oak in opposite ways
Multi-year observations reveal a larger than expected autumn respiration signal across northeast Eurasia
Reviews and syntheses: VOC emissions from soil cover in boreal and temperate natural ecosystems of the Northern Hemisphere
Internal tree cycling and atmospheric archiving of mercury: examination with concentration and stable isotope analyses
Contrasting drought legacy effects on gross primary productivity in a mixed versus pure beech forest
CO2 and CH4 exchanges between moist moss tundra and atmosphere on Kapp Linné, Svalbard
Recent extreme drought events in the Amazon rainforest: assessment of different precipitation and evapotranspiration datasets and drought indicators
Variability and uncertainty in flux-site-scale net ecosystem exchange simulations based on machine learning and remote sensing: a systematic evaluation
Update of a biogeochemical model with process-based algorithms to predict ammonia volatilization from fertilized cultivated uplands and rice paddy fields
Massive warming-induced carbon loss from subalpine grassland soils in an altitudinal transplantation experiment
Climatic variation drives loss and restructuring of carbon and nitrogen in boreal forest wildfire
Gaps in network infrastructure limit our understanding of biogenic methane emissions for the United States
Changes of the aerodynamic characteristics of a flux site after an extensive windthrow
Carbon sequestration potential of street tree plantings in Helsinki
Technical note: Incorporating expert domain knowledge into causal structure discovery workflows
Sensitivity of biomass burning emissions estimates to land surface information
A convolutional neural network for spatial downscaling of satellite-based solar-induced chlorophyll fluorescence (SIFnet)
Influence of plant ecophysiology on ozone dry deposition: comparing between multiplicative and photosynthesis-based dry deposition schemes and their responses to rising CO2 level
Modeling the interinfluence of fertilizer-induced NH3 emission, nitrogen deposition, and aerosol radiative effects using modified CESM2
Physiological and climate controls on foliar mercury uptake by European tree species
Radiation, soil water content, and temperature effects on carbon cycling in an alpine swamp meadow of the northeastern Qinghai–Tibetan Plateau
Representativeness assessment of the pan-Arctic eddy covariance site network and optimized future enhancements
Stephen E. Schwartz
Biogeosciences, 21, 5045–5057, https://doi.org/10.5194/bg-21-5045-2024, https://doi.org/10.5194/bg-21-5045-2024, 2024
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Anticorrelation in uptake of atmospheric CO2 following pulse emission or abrupt cessation of emissions is examined in two key model intercomparison studies. In both studies net transfer coefficients from the atmosphere to the world ocean and the terrestrial biosphere are anticorrelated across models, reducing inter-model diversity in decrease of atmospheric CO2 following the perturbation, increasing uncertainties of global warming potentials and consequences of prospective emission reductions.
Qian Li, Gil Lerner, Einat Bar, Efraim Lewinsohn, and Eran Tas
Biogeosciences, 21, 4133–4147, https://doi.org/10.5194/bg-21-4133-2024, https://doi.org/10.5194/bg-21-4133-2024, 2024
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Our research indicates that instantaneous changes in meteorological parameters better reflect drought-induced changes in the emission rates of biogenic volatile organic compounds (BVOCs) from natural vegetation than their absolute values. However, following a small amount of irrigation, this trend became more moderate or reversed, accompanied by a dramatic increase in BVOC emission rates. These findings advance our understanding of BVOC emissions under climate change.
Pia Gottschalk, Aram Kalhori, Zhan Li, Christian Wille, and Torsten Sachs
Biogeosciences, 21, 3593–3616, https://doi.org/10.5194/bg-21-3593-2024, https://doi.org/10.5194/bg-21-3593-2024, 2024
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To improve the accuracy of spatial carbon exchange estimates, we evaluated simple linear models for net ecosystem exchange (NEE) and gross primary productivity (GPP) and how they can be used to upscale the CO2 exchange of agricultural fields. The models are solely driven by Sentinel-2-derived vegetation indices (VIs). Evaluations show that different VIs have variable power to estimate NEE and GPP of crops in different years. The overall performance is as good as results from complex crop models.
Liliana Scapucci, Ankit Shekhar, Sergio Aranda-Barranco, Anastasiia Bolshakova, Lukas Hörtnagl, Mana Gharun, and Nina Buchmann
Biogeosciences, 21, 3571–3592, https://doi.org/10.5194/bg-21-3571-2024, https://doi.org/10.5194/bg-21-3571-2024, 2024
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Forests face increased exposure to “compound soil and atmospheric drought” (CSAD) events due to global warming. We examined the impacts and drivers of CO2 fluxes during CSAD events at multiple layers of a deciduous forest over 18 years. Results showed reduced net ecosystem productivity and forest-floor respiration during CSAD events, mainly driven by soil and atmospheric drought. This unpredictability in forest CO2 fluxes jeopardises reforestation projects aimed at mitigating CO2 emissions.
Annika Einbock and Franz Conen
EGUsphere, https://doi.org/10.5194/egusphere-2024-2067, https://doi.org/10.5194/egusphere-2024-2067, 2024
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A small fraction of particles found at great heights in the atmosphere can freeze cloud droplets at temperatures ≥ -10 °C and thus influence cloud properties. We provide a novel type of evidence that plant canopies are a major source of such biological ice nucleating particles in air above the Alps potentially affecting mixed-phase cloud development.
Tamara Emmerichs, Yen-Sen Lu, and Domenico Taraborrelli
Biogeosciences, 21, 3251–3269, https://doi.org/10.5194/bg-21-3251-2024, https://doi.org/10.5194/bg-21-3251-2024, 2024
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We assess the representation of the plant response to surface water in a global atmospheric chemistry model. This sensitivity is crucial for the return of precipitation back into the atmosphere and thus significantly impacts the representation of weather as well as air quality. The newly implemented response function reduces this process and has a better comparison with satellite observations. This yields a higher intensity of unusual warm periods and higher production of air pollutants.
Nina L. H. Kinney, Charles A. Hepburn, Matthew I. Gibson, Daniel Ballesteros, and Thomas F. Whale
Biogeosciences, 21, 3201–3214, https://doi.org/10.5194/bg-21-3201-2024, https://doi.org/10.5194/bg-21-3201-2024, 2024
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Molecules released from plant pollen induce the formation of ice from supercooled water at temperatures warm enough to suggest an underlying function for this activity. In this study we show that ice nucleators are ubiquitous in pollen. We suggest the molecules responsible fulfil some unrelated biological function and nucleate ice incidentally. The ubiquity of ice-nucleating molecules in pollen and particularly active examples reveal a greater potential for pollen to impact weather and climate.
Max Gaber, Yanghui Kang, Guy Schurgers, and Trevor Keenan
Biogeosciences, 21, 2447–2472, https://doi.org/10.5194/bg-21-2447-2024, https://doi.org/10.5194/bg-21-2447-2024, 2024
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Gross primary productivity (GPP) describes the photosynthetic carbon assimilation, which plays a vital role in the carbon cycle. We can measure GPP locally, but producing larger and continuous estimates is challenging. Here, we present an approach to extrapolate GPP to a global scale using satellite imagery and automated machine learning. We benchmark different models and predictor variables and achieve an estimate that can capture 75 % of the variation in GPP.
Florian Wieland, Nadine Bothen, Ralph Schwidetzky, Teresa M. Seifried, Paul Bieber, Ulrich Pöschl, Konrad Meister, Mischa Bonn, Janine Fröhlich-Nowoisky, and Hinrich Grothe
EGUsphere, https://doi.org/10.5194/egusphere-2024-752, https://doi.org/10.5194/egusphere-2024-752, 2024
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Betula pendula is a widespread birch tree species containing ice nucleation agents that can trigger the freezing of cloud droplets, and thereby alter the evolution of clouds. Our study identifies three distinct ice-nucleating macromolecules (INMs) and aggregates of varying size that can nucleate ice at temperatures of up to -5.4 °C. Our findings suggest that these vegetation-derived particles may influence atmospheric processes, weather, and climate stronger than previously thought.
Sinikka J. Paulus, Rene Orth, Sung-Ching Lee, Anke Hildebrandt, Martin Jung, Jacob A. Nelson, Tarek Sebastian El-Madany, Arnaud Carrara, Gerardo Moreno, Matthias Mauder, Jannis Groh, Alexander Graf, Markus Reichstein, and Mirco Migliavacca
Biogeosciences, 21, 2051–2085, https://doi.org/10.5194/bg-21-2051-2024, https://doi.org/10.5194/bg-21-2051-2024, 2024
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Porous materials are known to reversibly trap water from the air, even at low humidity. However, this behavior is poorly understood for soils. In this analysis, we test whether eddy covariance is able to measure the so-called adsorption of atmospheric water vapor by soils. We find that this flux occurs frequently during dry nights in a Mediterranean ecosystem, while EC detects downwardly directed vapor fluxes. These results can help to map moisture uptake globally.
Luana Krebs, Susanne Burri, Iris Feigenwinter, Mana Gharun, Philip Meier, and Nina Buchmann
Biogeosciences, 21, 2005–2028, https://doi.org/10.5194/bg-21-2005-2024, https://doi.org/10.5194/bg-21-2005-2024, 2024
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This study explores year-round forest-floor greenhouse gas (GHG) fluxes in a Swiss spruce forest. Soil temperature and snow depth affected forest-floor respiration, while CH4 uptake was linked to snow cover. Negligible N2O fluxes were observed. In 2022, a warm year, CO2 emissions notably increased. The study suggests rising forest-floor GHG emissions due to climate change, impacting carbon sink behavior. Thus, for future forest management, continuous year-round GHG flux measurements are crucial.
Simone Rodrigues, Glauber Cirino, Demerval Moreira, Andrea Pozzer, Rafael Palácios, Sung-Ching Lee, Breno Imbiriba, José Nogueira, Maria Isabel Vitorino, and George Vourlitis
Biogeosciences, 21, 843–868, https://doi.org/10.5194/bg-21-843-2024, https://doi.org/10.5194/bg-21-843-2024, 2024
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The radiative effects of atmospheric particles are still unknown for a wide variety of species and types of vegetation present in Amazonian biomes. We examined the effects of aerosols on solar radiation and their impacts on photosynthesis in an area of semideciduous forest in the southern Amazon Basin. Under highly smoky-sky conditions, our results show substantial photosynthetic interruption (20–70 %), attributed specifically to the decrease in solar radiation and leaf canopy temperature.
Matthew Gordon Davis, Kevin Yan, and Jennifer Grace Murphy
EGUsphere, https://doi.org/10.5194/egusphere-2024-126, https://doi.org/10.5194/egusphere-2024-126, 2024
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Ammonia applied as fertilizer can volatilize into the atmosphere, this can threaten vulnerable ecosystems and human health. We investigated the partitioning of ammonia between an immobile adsorbed phase and mobile aqueous phase using several adsorption models. Using the Temkin model we determined that previous approaches to this issue may over-estimate the quantity available for exchange by a factor of 5 – 12, suggesting that ammonia emissions from soil may be overestimated.
Ruben B. Schulte, Jordi Vilà-Guerau de Arellano, Susanna Rutledge-Jonker, Shelley van der Graaf, Jun Zhang, and Margreet C. van Zanten
Biogeosciences, 21, 557–574, https://doi.org/10.5194/bg-21-557-2024, https://doi.org/10.5194/bg-21-557-2024, 2024
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We analyzed measurements with the aim of finding relations between the surface atmosphere exchange of NH3 and the CO2 uptake and transpiration by vegetation. We found a high correlation of daytime NH3 emissions with both latent heat flux and photosynthetically active radiation. Very few simultaneous measurements of NH3, CO2 fluxes and meteorological variables exist at sub-diurnal timescales. This study paves the way to finding more robust relations between the NH3 exchange flux and CO2 uptake.
Alex Mavrovic, Oliver Sonnentag, Juha Lemmetyinen, Carolina Voigt, Nick Rutter, Paul Mann, Jean-Daniel Sylvain, and Alexandre Roy
Biogeosciences, 20, 5087–5108, https://doi.org/10.5194/bg-20-5087-2023, https://doi.org/10.5194/bg-20-5087-2023, 2023
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We present an analysis of soil CO2 emissions in boreal and tundra regions during the non-growing season. We show that when the soil is completely frozen, soil temperature is the main control on CO2 emissions. When the soil is around the freezing point, with a mix of liquid water and ice, the liquid water content is the main control on CO2 emissions. This study highlights that the vegetation–snow–soil interactions must be considered to understand soil CO2 emissions during the non-growing season.
Yuhao Cui, Eri Tachibana, Kimitaka Kawamura, and Yuzo Miyazaki
Biogeosciences, 20, 4969–4980, https://doi.org/10.5194/bg-20-4969-2023, https://doi.org/10.5194/bg-20-4969-2023, 2023
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Fatty alcohols (FAs) are major components of surface lipids in plant leaves and serve as surface-active aerosols. Our study on the aerosol size distributions in a forest suggests that secondary FAs (SFAs) originated from plant waxes and that leaf senescence status is likely an important factor controlling the size distribution of SFAs. This study provides new insights into the sources of primary biological aerosol particles (PBAPs) and their effects on the aerosol ice nucleation activity.
Joyson Ahongshangbam, Liisa Kulmala, Jesse Soininen, Yasmin Frühauf, Esko Karvinen, Yann Salmon, Anna Lintunen, Anni Karvonen, and Leena Järvi
Biogeosciences, 20, 4455–4475, https://doi.org/10.5194/bg-20-4455-2023, https://doi.org/10.5194/bg-20-4455-2023, 2023
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Urban vegetation is important for removing urban CO2 emissions and cooling. We studied the response of urban trees' functions (photosynthesis and transpiration) to a heatwave and drought at four urban green areas in the city of Helsinki. We found that tree water use was increased during heatwave and drought periods, but there was no change in the photosynthesis rates. The heat and drought conditions were severe at the local scale but were not excessive enough to restrict urban trees' functions.
Ryan Vella, Andrea Pozzer, Matthew Forrest, Jos Lelieveld, Thomas Hickler, and Holger Tost
Biogeosciences, 20, 4391–4412, https://doi.org/10.5194/bg-20-4391-2023, https://doi.org/10.5194/bg-20-4391-2023, 2023
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We investigated the effect of the El Niño–Southern Oscillation (ENSO) on biogenic volatile organic compound (BVOC) emissions from plants. ENSO events can cause a significant increase in these emissions, which have a long-term impact on the Earth's atmosphere. Persistent ENSO conditions can cause long-term changes in vegetation, resulting in even higher BVOC emissions. We link ENSO-induced emission anomalies with driving atmospheric and vegetational variables.
Nadav Bekin and Nurit Agam
Biogeosciences, 20, 3791–3802, https://doi.org/10.5194/bg-20-3791-2023, https://doi.org/10.5194/bg-20-3791-2023, 2023
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The mechanisms of soil CO2 flux in dry desert soils are not fully understood. Yet studies conducted in desert ecosystems rarely discuss potential errors related to using the commonly used flux chambers in dry and bare soils. In our study, the conventional deployment practice of the chambers underestimated the instantaneous CO2 flux by up to 50 % and the total daily CO2 uptake by 35 %. This suggests that desert soils are a larger carbon sink than previously reported.
Rosemary J. Eufemio, Ingrid de Almeida Ribeiro, Todd L. Sformo, Gary A. Laursen, Valeria Molinero, Janine Fröhlich-Nowoisky, Mischa Bonn, and Konrad Meister
Biogeosciences, 20, 2805–2812, https://doi.org/10.5194/bg-20-2805-2023, https://doi.org/10.5194/bg-20-2805-2023, 2023
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Lichens, the dominant vegetation in the Arctic, contain ice nucleators (INs) that enable freezing close to 0°C. Yet the abundance, diversity, and function of lichen INs is unknown. Our screening of lichens across Alaska reveal that most species have potent INs. We find that lichens contain two IN populations which retain activity under environmentally relevant conditions. The ubiquity and stability of lichen INs suggest that they may have considerable impacts on local atmospheric patterns.
Doaa Aboelyazeed, Chonggang Xu, Forrest M. Hoffman, Jiangtao Liu, Alex W. Jones, Chris Rackauckas, Kathryn Lawson, and Chaopeng Shen
Biogeosciences, 20, 2671–2692, https://doi.org/10.5194/bg-20-2671-2023, https://doi.org/10.5194/bg-20-2671-2023, 2023
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Photosynthesis is critical for life and has been affected by the changing climate. Many parameters come into play while modeling, but traditional calibration approaches face many issues. Our framework trains coupled neural networks to provide parameters to a photosynthesis model. Using big data, we independently found parameter values that were correlated with those in the literature while giving higher correlation and reduced biases in photosynthesis rates.
Norbert Pirk, Kristoffer Aalstad, Yeliz A. Yilmaz, Astrid Vatne, Andrea L. Popp, Peter Horvath, Anders Bryn, Ane Victoria Vollsnes, Sebastian Westermann, Terje Koren Berntsen, Frode Stordal, and Lena Merete Tallaksen
Biogeosciences, 20, 2031–2047, https://doi.org/10.5194/bg-20-2031-2023, https://doi.org/10.5194/bg-20-2031-2023, 2023
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We measured the land–atmosphere exchange of CO2 and water vapor in alpine Norway over 3 years. The extremely snow-rich conditions in 2020 reduced the total annual evapotranspiration to 50 % and reduced the growing-season carbon assimilation to turn the ecosystem from a moderate annual carbon sink to an even stronger source. Our analysis suggests that snow cover anomalies are driving the most consequential short-term responses in this ecosystem’s functioning.
Hamadou Balde, Gabriel Hmimina, Yves Goulas, Gwendal Latouche, and Kamel Soudani
Biogeosciences, 20, 1473–1490, https://doi.org/10.5194/bg-20-1473-2023, https://doi.org/10.5194/bg-20-1473-2023, 2023
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This study focuses on the relationship between sun-induced chlorophyll fluorescence (SIF) and ecosystem gross primary productivity (GPP) across the ICOS European flux tower network. It shows that SIF, coupled with reflectance observations, explains over 80 % of the GPP variability across diverse ecosystems but fails to bring new information compared to reflectance alone at coarse spatial scales (~5 km). These findings have applications in agriculture and ecophysiological studies.
John T. Walker, Xi Chen, Zhiyong Wu, Donna Schwede, Ryan Daly, Aleksandra Djurkovic, A. Christopher Oishi, Eric Edgerton, Jesse Bash, Jennifer Knoepp, Melissa Puchalski, John Iiames, and Chelcy F. Miniat
Biogeosciences, 20, 971–995, https://doi.org/10.5194/bg-20-971-2023, https://doi.org/10.5194/bg-20-971-2023, 2023
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Better estimates of atmospheric nitrogen (N) deposition are needed to accurately assess ecosystem risk and impacts from deposition of nutrients and acidity. Using measurements and modeling, we estimate total N deposition of 6.7 kg N ha−1 yr−1 at a forest site in the southern Appalachian Mountains, a region sensitive to atmospheric deposition. Reductions in deposition of reduced forms of N (ammonia and ammonium) will be needed to meet the lowest estimates of N critical loads for the region.
Yi-Ying Chen and Sebastiaan Luyssaert
Biogeosciences, 20, 349–363, https://doi.org/10.5194/bg-20-349-2023, https://doi.org/10.5194/bg-20-349-2023, 2023
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Tropical cyclones are typically assumed to be associated with ecosystem damage. This study challenges this assumption and suggests that instead of reducing leaf area, cyclones in East Asia may increase leaf area by alleviating water stress.
Deborah F. McGlynn, Graham Frazier, Laura E. R. Barry, Manuel T. Lerdau, Sally E. Pusede, and Gabriel Isaacman-VanWertz
Biogeosciences, 20, 45–55, https://doi.org/10.5194/bg-20-45-2023, https://doi.org/10.5194/bg-20-45-2023, 2023
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Using a custom-made gas chromatography flame ionization detector, 2 years of speciated hourly biogenic volatile organic compound data were collected in a forest in central Virginia. We identify diurnal and seasonal variability in the data, which is shown to impact atmospheric oxidant budgets. A comparison with emission models identified discrepancies with implications for model outcomes. We suggest increased monitoring of speciated biogenic volatile organic compounds to improve modeled results.
Luke D. Schiferl, Jennifer D. Watts, Erik J. L. Larson, Kyle A. Arndt, Sébastien C. Biraud, Eugénie S. Euskirchen, Jordan P. Goodrich, John M. Henderson, Aram Kalhori, Kathryn McKain, Marikate E. Mountain, J. William Munger, Walter C. Oechel, Colm Sweeney, Yonghong Yi, Donatella Zona, and Róisín Commane
Biogeosciences, 19, 5953–5972, https://doi.org/10.5194/bg-19-5953-2022, https://doi.org/10.5194/bg-19-5953-2022, 2022
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As the Arctic rapidly warms, vast stores of thawing permafrost could release carbon dioxide (CO2) into the atmosphere. We combined observations of atmospheric CO2 concentrations from aircraft and a tower with observed CO2 fluxes from tundra ecosystems and found that the Alaskan North Slope in not a consistent source nor sink of CO2. Our study shows the importance of using both site-level and atmospheric measurements to constrain regional net CO2 fluxes and improve biogenic processes in models.
Pascal Wintjen, Frederik Schrader, Martijn Schaap, Burkhard Beudert, Richard Kranenburg, and Christian Brümmer
Biogeosciences, 19, 5287–5311, https://doi.org/10.5194/bg-19-5287-2022, https://doi.org/10.5194/bg-19-5287-2022, 2022
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For the first time, we compared four methods for estimating the annual dry deposition of total reactive nitrogen into a low-polluted forest ecosystem. In our analysis, we used 2.5 years of flux measurements, an in situ modeling approach, a large-scale chemical transport model (CTM), and canopy budget models. Annual nitrogen dry deposition budgets ranged between 4.3 and 6.7 kg N ha−1 a−1, depending on the applied method.
Michael Staudt, Juliane Daussy, Joseph Ingabire, and Nafissa Dehimeche
Biogeosciences, 19, 4945–4963, https://doi.org/10.5194/bg-19-4945-2022, https://doi.org/10.5194/bg-19-4945-2022, 2022
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We studied the short- and long-term effects of CO2 as a function of temperature on monoterpene emissions from holm oak. Similarly to isoprene, emissions decreased non-linearly with increasing CO2, with no differences among compounds and chemotypes. The CO2 response was modulated by actual leaf and growth temperature but not by growth CO2. Estimates of annual monoterpene release under double CO2 suggest that CO2 inhibition does not offset the increase in emissions due to expected warming.
Brendan Byrne, Junjie Liu, Yonghong Yi, Abhishek Chatterjee, Sourish Basu, Rui Cheng, Russell Doughty, Frédéric Chevallier, Kevin W. Bowman, Nicholas C. Parazoo, David Crisp, Xing Li, Jingfeng Xiao, Stephen Sitch, Bertrand Guenet, Feng Deng, Matthew S. Johnson, Sajeev Philip, Patrick C. McGuire, and Charles E. Miller
Biogeosciences, 19, 4779–4799, https://doi.org/10.5194/bg-19-4779-2022, https://doi.org/10.5194/bg-19-4779-2022, 2022
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Plants draw CO2 from the atmosphere during the growing season, while respiration releases CO2 to the atmosphere throughout the year, driving seasonal variations in atmospheric CO2 that can be observed by satellites, such as the Orbiting Carbon Observatory 2 (OCO-2). Using OCO-2 XCO2 data and space-based constraints on plant growth, we show that permafrost-rich northeast Eurasia has a strong seasonal release of CO2 during the autumn, hinting at an unexpectedly large respiration signal from soils.
Valery A. Isidorov and Andrej A. Zaitsev
Biogeosciences, 19, 4715–4746, https://doi.org/10.5194/bg-19-4715-2022, https://doi.org/10.5194/bg-19-4715-2022, 2022
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Biogenic volatile organic compounds (VOCs) play a critical role in earth-system processes: they are
main playersin the formation of tropospheric O3 and secondary aerosols, which have a significant impact on climate, human health and crops. A complex mixture of VOCs, formed as a result of physicochemical and biological processes, is released into the atmosphere from the forest floor. This review presents data on the composition of VOCs and contribution of various processes to their emissions.
David S. McLagan, Harald Biester, Tomas Navrátil, Stephan M. Kraemer, and Lorenz Schwab
Biogeosciences, 19, 4415–4429, https://doi.org/10.5194/bg-19-4415-2022, https://doi.org/10.5194/bg-19-4415-2022, 2022
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Spruce and larch trees are effective archiving species for historical atmospheric mercury using growth rings of bole wood. Mercury stable isotope analysis proved an effective tool to characterise industrial mercury signals and assess mercury uptake pathways (leaf uptake for both wood and bark) and mercury cycling within the trees. These data detail important information for understanding the mercury biogeochemical cycle particularly in forest systems.
Xin Yu, René Orth, Markus Reichstein, Michael Bahn, Anne Klosterhalfen, Alexander Knohl, Franziska Koebsch, Mirco Migliavacca, Martina Mund, Jacob A. Nelson, Benjamin D. Stocker, Sophia Walther, and Ana Bastos
Biogeosciences, 19, 4315–4329, https://doi.org/10.5194/bg-19-4315-2022, https://doi.org/10.5194/bg-19-4315-2022, 2022
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Identifying drought legacy effects is challenging because they are superimposed on variability driven by climate conditions in the recovery period. We develop a residual-based approach to quantify legacies on gross primary productivity (GPP) from eddy covariance data. The GPP reduction due to legacy effects is comparable to the concurrent effects at two sites in Germany, which reveals the importance of legacy effects. Our novel methodology can be used to quantify drought legacies elsewhere.
Anders Lindroth, Norbert Pirk, Ingibjörg S. Jónsdóttir, Christian Stiegler, Leif Klemedtsson, and Mats B. Nilsson
Biogeosciences, 19, 3921–3934, https://doi.org/10.5194/bg-19-3921-2022, https://doi.org/10.5194/bg-19-3921-2022, 2022
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We measured the fluxes of carbon dioxide and methane between a moist moss tundra and the atmosphere on Svalbard in order to better understand how such ecosystems are affecting the climate and vice versa. We found that the system was a small sink of carbon dioxide and a small source of methane. These fluxes are small in comparison with other tundra ecosystems in the high Arctic. Analysis of temperature sensitivity showed that respiration was more sensitive than photosynthesis above about 6 ℃.
Phillip Papastefanou, Christian S. Zang, Zlatan Angelov, Aline Anderson de Castro, Juan Carlos Jimenez, Luiz Felipe Campos De Rezende, Romina C. Ruscica, Boris Sakschewski, Anna A. Sörensson, Kirsten Thonicke, Carolina Vera, Nicolas Viovy, Celso Von Randow, and Anja Rammig
Biogeosciences, 19, 3843–3861, https://doi.org/10.5194/bg-19-3843-2022, https://doi.org/10.5194/bg-19-3843-2022, 2022
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The Amazon rainforest has been hit by multiple severe drought events. In this study, we assess the severity and spatial extent of the extreme drought years 2005, 2010 and 2015/16 in the Amazon. Using nine different precipitation datasets and three drought indicators we find large differences in drought stress across the Amazon region. We conclude that future studies should use multiple rainfall datasets and drought indicators when estimating the impact of drought stress in the Amazon region.
Haiyang Shi, Geping Luo, Olaf Hellwich, Mingjuan Xie, Chen Zhang, Yu Zhang, Yuangang Wang, Xiuliang Yuan, Xiaofei Ma, Wenqiang Zhang, Alishir Kurban, Philippe De Maeyer, and Tim Van de Voorde
Biogeosciences, 19, 3739–3756, https://doi.org/10.5194/bg-19-3739-2022, https://doi.org/10.5194/bg-19-3739-2022, 2022
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A number of studies have been conducted by using machine learning approaches to simulate carbon fluxes. We performed a meta-analysis of these net ecosystem exchange (NEE) simulations. Random forests and support vector machines performed better than other algorithms. Models with larger timescales had a lower accuracy. For different plant functional types (PFTs), there were significant differences in the predictors used and their effects on model accuracy.
Siqi Li, Wei Zhang, Xunhua Zheng, Yong Li, Shenghui Han, Rui Wang, Kai Wang, Zhisheng Yao, Chunyan Liu, and Chong Zhang
Biogeosciences, 19, 3001–3019, https://doi.org/10.5194/bg-19-3001-2022, https://doi.org/10.5194/bg-19-3001-2022, 2022
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The CNMM–DNDC model was modified to simulate ammonia volatilization (AV) from croplands. AV from cultivated uplands followed the first-order kinetics, which was jointly regulated by the factors of soil properties and meteorological conditions. AV simulation from rice paddy fields was improved by incorporating Jayaweera–Mikkelsen mechanisms. The modified model performed well in simulating the observed cumulative AV measured from 63 fertilization events in China.
Matthias Volk, Matthias Suter, Anne-Lena Wahl, and Seraina Bassin
Biogeosciences, 19, 2921–2937, https://doi.org/10.5194/bg-19-2921-2022, https://doi.org/10.5194/bg-19-2921-2022, 2022
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Because soils are an important sink for greenhouse gasses, we subjected sub-alpine grassland to a six-level climate change treatment.
Two independent methods showed that at warming > 1.5 °C the grassland ecosystem lost ca. 14 % or ca. 1 kg C m−2 in 5 years.
This shrinking of the terrestrial C sink implies a substantial positive feedback to the atmospheric greenhouse effect.
It is likely that this dramatic C loss is a transient effect before a new, climate-adjusted steady state is reached.
Johan A. Eckdahl, Jeppe A. Kristensen, and Daniel B. Metcalfe
Biogeosciences, 19, 2487–2506, https://doi.org/10.5194/bg-19-2487-2022, https://doi.org/10.5194/bg-19-2487-2022, 2022
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This study found climate to be a driving force for increasing per area emissions of greenhouse gases and removal of important nutrients from high-latitude forests due to wildfire. It used detailed direct measurements over a large area to uncover patterns and mechanisms of restructuring of forest carbon and nitrogen pools that are extrapolatable to larger regions. It also takes a step forward in filling gaps in global knowledge of northern forest response to climate-change-strengthened wildfires.
Sparkle L. Malone, Youmi Oh, Kyle A. Arndt, George Burba, Roisin Commane, Alexandra R. Contosta, Jordan P. Goodrich, Henry W. Loescher, Gregory Starr, and Ruth K. Varner
Biogeosciences, 19, 2507–2522, https://doi.org/10.5194/bg-19-2507-2022, https://doi.org/10.5194/bg-19-2507-2022, 2022
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To understand the CH4 flux potential of natural ecosystems and agricultural lands in the United States of America, a multi-scale CH4 observation network focused on CH4 flux rates, processes, and scaling methods is required. This can be achieved with a network of ground-based observations that are distributed based on climatic regions and land cover.
Bruna R. F. Oliveira, Jan J. Keizer, and Thomas Foken
Biogeosciences, 19, 2235–2243, https://doi.org/10.5194/bg-19-2235-2022, https://doi.org/10.5194/bg-19-2235-2022, 2022
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This study analyzes the impacts of this windthrow on the aerodynamic characteristics of zero-plane displacement and roughness length and, ultimately, their implications for the turbulent fluxes. The turbulent fluxes were only affected to a minor degree by the windthrow, but the footprint area of the flux tower changed markedly so that the target area of the measurements had to be redetermined.
Minttu Havu, Liisa Kulmala, Pasi Kolari, Timo Vesala, Anu Riikonen, and Leena Järvi
Biogeosciences, 19, 2121–2143, https://doi.org/10.5194/bg-19-2121-2022, https://doi.org/10.5194/bg-19-2121-2022, 2022
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The carbon sequestration potential of two street tree species and the soil beneath them was quantified with the urban land surface model SUEWS and the soil carbon model Yasso. The street tree plantings turned into a modest sink of carbon from the atmosphere after 14 years. Overall, the results indicate the importance of soil in urban carbon sequestration estimations, as soil respiration exceeded the carbon uptake in the early phase, due to the high initial carbon loss from the soil.
Jarmo Mäkelä, Laila Melkas, Ivan Mammarella, Tuomo Nieminen, Suyog Chandramouli, Rafael Savvides, and Kai Puolamäki
Biogeosciences, 19, 2095–2099, https://doi.org/10.5194/bg-19-2095-2022, https://doi.org/10.5194/bg-19-2095-2022, 2022
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Causal structure discovery algorithms have been making headway into Earth system sciences, and they can be used to increase our understanding on biosphere–atmosphere interactions. In this paper we present a procedure on how to utilize prior knowledge of the domain experts together with these algorithms in order to find more robust causal structure models. We also demonstrate how to avoid pitfalls such as over-fitting and concept drift during this process.
Makoto Saito, Tomohiro Shiraishi, Ryuichi Hirata, Yosuke Niwa, Kazuyuki Saito, Martin Steinbacher, Doug Worthy, and Tsuneo Matsunaga
Biogeosciences, 19, 2059–2078, https://doi.org/10.5194/bg-19-2059-2022, https://doi.org/10.5194/bg-19-2059-2022, 2022
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This study tested combinations of two sources of AGB data and two sources of LCC data and used the same burned area satellite data to estimate BB CO emissions. Our analysis showed large discrepancies in annual mean CO emissions and explicit differences in the simulated CO concentrations among the BB emissions estimates. This study has confirmed that BB emissions estimates are sensitive to the land surface information on which they are based.
Johannes Gensheimer, Alexander J. Turner, Philipp Köhler, Christian Frankenberg, and Jia Chen
Biogeosciences, 19, 1777–1793, https://doi.org/10.5194/bg-19-1777-2022, https://doi.org/10.5194/bg-19-1777-2022, 2022
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We develop a convolutional neural network, named SIFnet, that increases the spatial resolution of SIF from TROPOMI by a factor of 10 to a spatial resolution of 0.005°. SIFnet utilizes coarse SIF observations, together with a broad range of high-resolution auxiliary data. The insights gained from interpretable machine learning techniques allow us to make quantitative claims about the relationships between SIF and other common parameters related to photosynthesis.
Shihan Sun, Amos P. K. Tai, David H. Y. Yung, Anthony Y. H. Wong, Jason A. Ducker, and Christopher D. Holmes
Biogeosciences, 19, 1753–1776, https://doi.org/10.5194/bg-19-1753-2022, https://doi.org/10.5194/bg-19-1753-2022, 2022
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We developed and used a terrestrial biosphere model to compare and evaluate widely used empirical dry deposition schemes with different stomatal approaches and found that using photosynthesis-based stomatal approaches can reduce biases in modeled dry deposition velocities in current chemical transport models. Our study shows systematic errors in current dry deposition schemes and the importance of representing plant ecophysiological processes in models under a changing climate.
Ka Ming Fung, Maria Val Martin, and Amos P. K. Tai
Biogeosciences, 19, 1635–1655, https://doi.org/10.5194/bg-19-1635-2022, https://doi.org/10.5194/bg-19-1635-2022, 2022
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Fertilizer-induced ammonia detrimentally affects the environment by not only directly damaging ecosystems but also indirectly altering climate and soil fertility. To quantify these secondary impacts, we enabled CESM to simulate ammonia emission, chemical evolution, and deposition as a continuous cycle. If synthetic fertilizer use is to soar by 30 % from today's level, we showed that the counteracting impacts will increase the global ammonia emission by 3.3 Tg N per year.
Lena Wohlgemuth, Pasi Rautio, Bernd Ahrends, Alexander Russ, Lars Vesterdal, Peter Waldner, Volkmar Timmermann, Nadine Eickenscheidt, Alfred Fürst, Martin Greve, Peter Roskams, Anne Thimonier, Manuel Nicolas, Anna Kowalska, Morten Ingerslev, Päivi Merilä, Sue Benham, Carmen Iacoban, Günter Hoch, Christine Alewell, and Martin Jiskra
Biogeosciences, 19, 1335–1353, https://doi.org/10.5194/bg-19-1335-2022, https://doi.org/10.5194/bg-19-1335-2022, 2022
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Gaseous mercury is present in the atmosphere all over the globe. During the growing season, plants take up mercury from the air in a similar way as CO2. We investigated which factors impact this vegetational mercury uptake by analyzing a large dataset of leaf mercury uptake rates of trees in Europe. As a result, we conclude that mercury uptake is foremost controlled by tree-intrinsic traits like physiological activity but also by climatic factors like dry conditions in the air and in soils.
Junqi Wei, Xiaoyan Li, Lei Liu, Torben Røjle Christensen, Zhiyun Jiang, Yujun Ma, Xiuchen Wu, Hongyun Yao, and Efrén López-Blanco
Biogeosciences, 19, 861–875, https://doi.org/10.5194/bg-19-861-2022, https://doi.org/10.5194/bg-19-861-2022, 2022
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Although water availability has been linked to the response of ecosystem carbon (C) sink–source to climate warming, the mechanisms by which C uptake responds to soil moisture remain unclear. We explored how soil water and other environmental drivers modulate net C uptake in an alpine swamp meadow. Results reveal that nearly saturated soil conditions during warm seasons can help to maintain lower ecosystem respiration and therefore enhance the C sequestration capacity in this alpine swamp meadow.
Martijn M. T. A. Pallandt, Jitendra Kumar, Marguerite Mauritz, Edward A. G. Schuur, Anna-Maria Virkkala, Gerardo Celis, Forrest M. Hoffman, and Mathias Göckede
Biogeosciences, 19, 559–583, https://doi.org/10.5194/bg-19-559-2022, https://doi.org/10.5194/bg-19-559-2022, 2022
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Thawing of Arctic permafrost soils could trigger the release of vast amounts of carbon to the atmosphere, thus enhancing climate change. Our study investigated how well the current network of eddy covariance sites to monitor greenhouse gas exchange at local scales captures pan-Arctic flux patterns. We identified large coverage gaps, e.g., in Siberia, but also demonstrated that a targeted addition of relatively few sites can significantly improve network performance.
Cited articles
Allen, K., Corre, M. D., Tjoa, A., and Veldkamp, E.: Soil Nitrogen-cycling
responses to conversion of lowland forests to oil palm and rubber
plantations in Sumatra, Indonesia, PLoS ONE, 10, e0133325,
https://doi.org/10.1371/journal.pone.0133325, 2105.
Apichatmeta, K., Sudsiri, C. J., and Ritchie, R. J.: Photosynthesis of oil
palm (Elaeis guineensis), Sci. Hortic.-Amsterdam, 214, 34–40,
https://doi.org/10.1016/j.scienta.2016.11.013, 2017.
Bakoumé, C., Shahbudin, N., Yacob, S., Siang, C. S., and Thambi, M. N.:
Improved method for estimating soil moisture deficit in oil palm (Elaeis guineensis Jacq.)
areas with limited climatic data, J. Agr. Sci., 5,
57–65, https://doi.org/10.5539/jas.v5n8p57, 2013.
Barcelos, E., de Almeida Rios, S., Cunha, R. N., Lopes, R., Motoike, S. Y.,
Babiychuk, E., and Kushnir, S.: Oil palm natural diversity and the potential
for yield improvement, Front. Plant Sci., 6, 190, https://doi.org/10.3389/fpls.2015.00190, 2015.
Bayona-Rodríguez, C. and Romero, H. M.: Estimation of transpiration in
oil palm (Elaeis guineensis Jacq.) with the heat ratio method,
Agronomía Colombiana, 34, 172–178,
https://doi.org/10.15446/agron.colomb.v34n2.55649, 2016.
Betts, R. A., Jones, C. D., Knight, J. R., Keeling, R. F., and Kennedy, J.
J.: El Niño and a record CO2 rise, Nat. Clim. Change, 6,
806–810, 2016.
Cai, W., Borlace, S., Lengaigne, M., van Resch, P., Collins, M., Vecchi, G.,
and Jin, F.-F.: Increasing frequency of extreme El Niño eventsdue to
greenhouse warming, Nat. Clim. Change, 4, 111–116, https://doi.org/10.1038/NCLIMATE2100, 2014.
Cai, W., Wang, G., Dewitte, B., Wu, L., Santoso, A., Takahashi, K., and
McPhaden, M.: Increased variability of eastern Pacific El Niño under
greenhouse warming, Nature, 564, 201–206, https://doi.org/10.1038/s41586-018-0776-9,
2018.
Caliman, J. and Southworth, A.: Effect of drought and haze on the
performance of oil palm, 1998 International Oil Palm Conference, Commodity
of the past, today, and the future, Sheraton Nusa Indah Hotel,
Bali, 23–25 September 1998, 1–40, 1998.
Cao, H.-X., Sun, C.-X., Shao, H.-B., and Lei, X.-T.: Effects of low
temperature and drought on the physiological and growth changes in oil palm
seedlings, Afr. J. Biotechnol., 10, 2630–2637,
https://doi.org/10.5897/AJB10.1272, 2011.
Chatfield, C.: Problem Solving: a Statistician's Guide, Chapman and
Hall, London, UK, 1995.
Cha-um, S., Yamda, N., Takabe, T., and Kirdmanee, C.: Physiological features
and growth characters of oil palm (Elaeis guineensis Jacq.) in response to reduced
water-deficit and rewatering, Aust. J. Crop Sci., 7,
432–439, 2013.
Chen, Z., Cao, J., Yu, H., and Shang, H.: Effects of elevated ozone levels
on photosynthesis, biomass and non-structural carbohydrates of Phoebe bournei and Phoebe
zhennan in subtropical China, Front. Plant Sci., 9, 1764, https://doi.org/10.3389/fpls.2018.01764, 2018.
Chong, K. L., Kanniah, K. D., Pohl, C., and Tan, K. P.: A review of remote
sensing applications for oil palm studies, Geo-spatial Information Science,
20, 184–200, https://doi.org/10.1080/10095020.2017.1337317, 2017.
Corley, R. H. and Tinker, P. B.: The Oil Palm,
Wiley-Blackwell, Chichester, West Sussex, UK, 2016.
Cunningham, S. C.: Photosynthetic responses to vapour pressure deficit in
temperature and tropical evergreen rainforest trees of Australia, Oecologia,
142, 521–528, https://doi.org/10.1007/s00442-004-1766-1, 2005.
Drescher, J., Rembold, K., Allen, K., Beckschäfer, P., Buchori, D.,
Clough, Y., and Scheu, S.: Ecological and socio-economic functions across
tropical land use systems after rainforest conversion, Philos.
T. R. Soc. B, 371, 20150275, https://doi.org/10.1098/rstb.2015.0275, 2016.
Dufrene, E. and Saugier, B.: Gas exchange of oil palm in relation to light,
vapour pressure deficit, temperature and leaf age, Funct. Ecol., 7,
97–104, 1993.
Falge, E., Baldocchi, D., Olson, R., Anthoni, P., Aubinet, M., Bernhofer,
C., and Wofsy, S.: Gap filling strategies for defensible annual sums of net
ecosystem exchange, Agr. Forest Meteorol., 107, 43–69, 2001.
Fan, Y., Roupsard, O., Bernoux, M., Le Maire, G., Panferov, O., Kotowska, M. M., and Knohl, A.: A sub-canopy structure for simulating oil palm in the Community Land Model (CLM-Palm): phenology, allocation and yield, Geosci. Model Dev., 8, 3785–3800, https://doi.org/10.5194/gmd-8-3785-2015, 2015.
Felzer, B. S., Cronin, T., Reilly, J. M., Melillo, J. M., and Wang, X.: Impacts
of ozone on trees and crops, C. R. Geosci., 339, 784–798, https://doi.org/10.1016/j.crte.2007.08.008, 2007.
Hardwick, S. R., Toumi, R., Pfeifer, M., Turner, E. C., Nilus, R., and
Ewers, R. M.: The relationship between leaf area index and microclimate in
tropical forest and oil palm plantation: Forest disturbance drives changes
in microclimate, Agr. Forest Meteorol., 201, 187–195,
https://doi.org/10.1016/j.agrformet.2014.11.010, 2015.
Henson, I. E.: Modelling the effects of “haze” on oil palm poductivity and
yield, J. Oil Palm Res., 12, 123–134, 2000.
Henson, I. E. and Harun, M. H.: Carbon dioxide enrichment in oil palm
canopies and its possible influence on photosynthesis, Oil Palm Bulletin, 51,
10–19, 2005a.
Henson, I. E. and Harun, M. H.: The influence of climatic conditions on gas
and energy exchanges above a young oil palm stand in North Kendah,
Malaysia, J. Oil Palm Res., 17, 73–91, 2005b.
Heuvelink, T. L., Dueck, T. A., Janse, J., Gort, G., and Marcelis, L. F.:
Enhancement of crop photosynthesis by diffuse light: quantifying the
contributing factors, Ann. Bot.-London, 114, 145–156,
https://doi.org/doi:10.1093/aob/mcu071, 2014.
Hewitt, C. N., MacKEnzie, A. R., Di Carlo, P., Di Marco, C. F., Dorsey, J. R.,
Evans, M., Fowler, D., Gallagher, M. W., Hopkons, J. R., Jones, C. E.,
Langford, B., Lee, J. D., Lewis, A. C., Lim, S. F., McQuaid, J., Misztal, P.,
Moller, S. J., Monks, P. S., Nemitz, E., Oram, D. E., Owen, S. M., Phillips,
G. J., Pugh, A. M., Pyle, J. A., Reeeves, C. E., Ryder, J., Siong, J., Skiba,
U., and Stewart, D. J.: Nitrogen management is essential to prevent tropical
oil palm plantations from causing ground-level ozone pollution, P. Natl. Acad. Sci. USA,
106, 18447–18451, 2009.
Hewitt, C. N., Ashworth, K., Boynard, A., Guenther, A., Langford, B.,
MacKenzie, A. R., Misztal, P. K., Nemitz, E., Owen, S. M., Possell, M., Pugh,
T. A. M., Ryan, A. C., and Wild, O.: Ground-level ozone influenced by circadian
control of isoprene emissions, Nat. Geosci., 4, 671–674, https://doi.org/10.1038/NGEO1271, 2011.
Huijnen, V., Wooster, M. J., Kaier, J. W., Gaveau, D. L., Flemming, J.,
Parrington, M., and van Weele, M.: Fire carbon emissions over maritime
southeast Asia in 2015 largest since 1997, Sci. Rep.-UK, 6, 26886,
https://doi.org/10.1038/srep26886, 2016.
Ibrahim, M. H., Jaafar, H. Z., Harun, M. H., and Yusop, M. R.: Changes in
growth and photosynthetic patterns of oil palm (Elaeis guineensis Jacq.)
seedlings exposed to short-term CO2 enrichment in a closed top chamber, Acta Physiol., 32, 305–313, 2010.
IPCC: Climate Change 2013: The physical science basis, Contribution of
working group I to the fifth assessment report of the intergovernmental
panel on cliamate change, edited by: Stocker, T. F., Qin, D., Plattner, G.-K., and
Midgley, P. M., Cambridge University Press, Cambridge, UK,
https://doi.org/10.1017/CBO9781107415324, 2013.
Jaafar, H. Z. and Ibrahim, M. H.: Photosynthesis and quantum yield of oil
palm juveniles to elevated carbon dioxide, in: Advances Photosynthesis Fundamental Aspects, edited by: Najafpour, M. M.,
InTechPubl, Rijeka, Croatia, 321–340, https://doi.org/10.5772/26167, 2012.
Jazayeri, S. M., Rivera, Y. D., Camperos-Reyes, J. E., and Romero, H. M.:
Physiological effects of water deficit on two oil palm (Elaeis guineensis
Jacq.) genotypes, Agronomia Colombiana, 33, 164–173,
https://doi.org/10.15446/agron.colomb.v33n2.49846, 2015.
Jiménez-Muñoz, J. C., Mattar, C., Barichivich, J.,
Santamaria-Artigas, A., Takahashi, K., Malhi, Y., and Schrier, G.:
Record-breaking warming and extreme drought in the Amazon rainforest during
the course of El Niño 2015–2016, Sci. Rep.-UK, 6, 33130, 2016.
Kanniah, K. D., Beringer, J., North, P., and Hutley, L.: Control of
atmospheric particles on diffuse radiation and terrestrial plant
productivity: A review, Prog. Phys. Geog., 36, 209–237,
https://doi.org/10.1177/0309133311434244, 2012.
Keupp, L., Pollinger, F., and Paeth, H.: Assessment of future ENSO changes
in a CMIP3/CMIP5 multi-model and multi-index framework, Int.
J. Climatol., 37, 3439–3451, https://doi.org/10.1002/joc.4928, 2017.
Kim, S. T., Cai, W., Jin, F.-F., Santoso, A., Wu, L., and Guilyardi, E.:
Response of El Niño sea surface temperature variability to greenhouse
warming, Nat. Clim. Change, 786–790, https://doi.org/10.1038/NCLIMATE2326, 2014.
Kita, K., Fujiwara, M., and Kawakami, S.: Total ozone increase associated
with forest fires over the Indonesian region and its relation to the El
Niño-southern oscillation, Atmos. Environ., 34, 2681–2690, 2000.
Knohl, A. and Baldocchi, D. D.: Effects of diffuse radiation on canopy gas
exchange processes in a forest ecosystem, J. Geophys. Res.,
113, G02023, https://doi.org/10.1029/2007JG000663, 2008.
Koh, L. P. and Ghazoul, J.: Biofuels, bodiversity, and people:
Understanding the conflicts and finding opportunities, Biol.
Conserv., 141, 2450–2460, https://doi.org/10.1016/j.biocon.2008.08.005, 2008.
Koh, L. P., Miettinen, J., Liew, S. C., and Ghazoul, J.: Remotely sensed
evidence of tropical peatland conversion to oil palm, P.
Natl. Acad. Sci. USA, 108, 5127–5132,
https://doi.org/10.1073/pnas.1018776108, 2011.
Kozlov, V. S., Yausheva, E. P., Terpugova, S. A., Panchenko, M. V., Chernov,
D. G., and Shmargunov, V. P.: Optical-microphysical properties of smoke haze
from Siberian forest fires in summer 2012, Int. J. Remote
Sens., 35, 5722–5741, 2014.
Lamade, E. and Bouillet, J.-P.: Carbon storage and global change: the role
of oil palm, Oilseeds and fats, Crops and Lipids, 12, 154–160, 2005.
Legros, S., Mialet-Serra, I., Caliman, J.-P., Siregar, F. A.,
Clément-Vidal, A., and Dingkuhn, M.: Phenology and growth adjustments of
oil palm (Elaeis guineensis) to photoperiod and climate variability, Ann.
Bot.-London, 104, 1171–1182, https://doi.org/10.1093/aob/mcp214, 2009.
Lim, Y.-K., Kovach, R. M., Pawson, S., and Vernieres, G.: The 2015/16 El
Niño event in context of the MERRA-2 reanalysis: a comparison of the
tropical Pacific with 1982/83 and 1997/98, J. Climate, 30,
4819–4842, https://doi.org/10.1175/JCLI-D-16-0800.1, 2017.
Maillard, G., Ochs, R., and Daniel, C.: Analysis of the effects of drought
on the oil palm, Oleagineux, 29, 397–404, 1974.
Malavelle, F. F., Haywood, J. M., Mercado, L. M., Folberth, G. A., Bellouin, N., Sitch, S., and Artaxo, P.: Studying the impact of biomass burning aerosol radiative and climate effects on the Amazon rainforest productivity with an Earth system model, Atmos. Chem. Phys., 19, 1301–1326, https://doi.org/10.5194/acp-19-1301-2019, 2019.
Manoli, G., Meijide, A., Huth, N., Knohl, A., Kosugi, Y., Burlando, P., and
Fatichi, S.: Ecohydrological changes after tropical forest conversion to oil
palm, Environ. Res. Lett., 13, 064035,
https://doi.org/10.1088/1748-9326/aac54e, 2018.
Mathews, J. and Ardiyanto, A.: Impact of forest fire induces haze on oil
extraction rate (OER) in Central Kalimantan province, Journal of Oil Palm,
Environment and Health, 7, 28–33, https://doi.org/10.5366/jope.2016.03, 2016.
Matysek, M., Evers, S., Samuel, M. K., and Sjogersten, S.: High heterotrophic
CO2 emissions from a Malaysian oil palm plantations during dry-season,
Wetl. Ecol. Manag., 26, 415–424, https://doi.org/10.1007/s11273-017-9583-6, 2018.
Meijide, A., Röll, A., Fan, Y., Herbst, M., Niu, F., Tiedemann, F., and
Knohl, A.: Controls of water and energy fluxes in oil palm plantations:
Environmental variables and oil palm age, Agr. Forest Meteorol., 239, 71–85, https://doi.org/10.1016/j.agrformet.2017.02.034, 2017.
Meijide, A., Badu, C. S., Moyano, F., Tiralla, N., Gunawan, D., and Knohl,
A.: Impact of forest conversion to oil palm and rubber plantations on
microclimate and the role of the 2015 ENSO event. Agr. Forest Meteorol., 252, 208–219, https://doi.org/10.1016/j.agrformet.2018.01.013, 2018.
Méndez, Y. D. R., Chacón, L. M., Bayona, C. J., and Romero, H. M.:
Physiological response of oil palm interspecific hybrids (Elaeis oleifera H. N. K. Cortes
versus Elaeis guineensis Jacq.) to water deficit, Brazilian Society of Plant Physiology,
24, 273–280, https://doi.org/10.1590/S1677-04202012000400006, 2012.
Mercado, L. M., Bellouin, N., Sithc, S., Boucher, O., Huntingford, C., Wild,
M., and Cox, P. M.: Impact of changes in diffuse radiation on the global land
carbon sink, Nature, 458, 1014–1017, https://doi.org/10.1038/nature07949, 2009.
Moraes, R. M., Furlan, C. M., Bulbovas, P., Domingos, M., Meirelles, S. T.,
Salatino, A., Delitti, W. B. C., and Sanz, M. J.: Photosynthetic responses of
tropical trees to short-term exposure to ozone, Photosynthetica, 42,
291–293, 2004.
Moreira, D. S., Longo, K. M., Freitas, S. R., Yamasoe, M. A., Mercado, L. M., Rosário, N. E., Gloor, E., Viana, R. S. M., Miller, J. B., Gatti, L. V., Wiedemann, K. T., Domingues, L. K. G., and Correia, C. C. S.: Modeling the radiative effects of biomass burning aerosols on carbon fluxes in the Amazon region, Atmos. Chem. Phys., 17, 14785–14810, https://doi.org/10.5194/acp-17-14785-2017, 2017.
Nassar, R., Logan, J. A., Megretskaia, I. A., Murray, L. T., Zang, L., and
Jones, D. B. A.: Analysis of tropical tropospheric ozone, carbon monoxide, and
water vapour during the 2006 El Niño using TES observations and the
GEOS-Chem model, J. Geophys. Res., 114, D17304, https://doi.org/10.1029/2009JD011760, 2009.
Neelin, J. D., Münnich, M., Su, H., Meyerson, J. E., and Holloway, C.
E.: Tropical drying trends in global warming models and observations.
P. Natl. Acad. Sci., 103, 6110–6115, 2006.
Niu, F., Röll, A., Hardanto, A., Meijide, A., Köhler, M.,
Hendrayanto, and Hölscher, D.: Oil palm water use: calibration of a sap
flux method and a field measurement scheme, Tree Physiol., 35, 563–573,
https://doi.org/10.1093/treephys/tpv013, 2015.
Noor, M. R., Harun, M. H., and Jantan, N. M.: Physiological plant stress and
responses in oil palm, Oil Palm Bulletin, 62, 25–32, 2011.
Oettli, P., Behera, S. K., and Yamagata, T.: Climate based predictability of
oil palm tree yield in Malaysia, Sci. Rep.-UK, 8, 2271,
https://doi.org/10.1038/s41598-018-20298-0, 2018.
Olchev, A., Ibrom, A., Panferov, O., Gushchina, D., Kreilein, H., Popov, V., Propastin, P., June, T., Rauf, A., Gravenhorst, G., and Knohl, A.: Response of CO2 and H2O fluxes in a mountainous tropical rainforest in equatorial Indonesia to El Niño events, Biogeosciences, 12, 6655–6667, https://doi.org/10.5194/bg-12-6655-2015, 2015.
Oleson, K. W., Lawrence, D. M., Bonan, G. B., Drewniak, B., Huang, M.,
Koven, C. D., and Yang, Z.-L.: Technical description of version 4.5 of the
Community Land Model (CLM), National Center for Atmospheric
Research, Boulder, CO, USA, https://doi.org/10.5065/D6RR1W7M, 2013.
Paterson, R., Sariah, M., and Lima, N.: How will climate change affect oil
palm fungal diseases?, Crop Prot., 46, 113–120,
https://doi.org/10.1016/j.cropro.2012.12.023, 2013.
Paterson, R., Kumar, L., Taylor, S., and Lima, N.: Future climate effects on
suitability for growth of oil palms in Malaysia and Indonesia, Sci.
Rep.-UK, 5, 14457, https://doi.org/10.1038/srep14457, 2015.
Paterson, R., Kumar, L., Shabani, F., and Lima, N.: World climate
suitability projections to 2050 and 2100 for growing oil palm, J. Agr. Sci., 155, 689–702, https://doi.org/10.1017/S0021859616000605, 2017.
Pirker, J., Mosnier, A., Kraxner, F., Havlík, P., and Obersteiner, M.:
What are the limits to oil palm expansion?, Global Environ. Chang., 40,
73–81, https://doi.org/10.1016/j.gloenvcha.2016.06.007, 2016.
Power, S., Delage, F., Chung, C., Kociuba, G., and Keay, K.: Robust
twenty-first-century projections of El Niño and related precipitation
variability, Nature, 502, 541–547, https://doi.org/10.1038/nature12580, 2013.
Rasmusson, E. M. and Carpenter, T. H.: Variations in tropical sea surface
temperature and surface wind fields associated with the Southern
Oscillation/El Nino, Mon. Weather Rev., 110, 354–384, 1981.
Ray-Mukherjee, J., Nimon, K., Mukherjee, S., Morris, D. W., Slotow, R., and
Hamer, M.: Using commonality analysis in multiple regressions: a tool to
decompose regression effects in the face of multicollinearity, Methods
Ecol. Evol., 5, 320–328, https://doi.org/10.1111/2041-210x.12166, 2014.
Reichstein, M., Falge,E., Baldocchi, D., Papale, D., Aubinet, M., Berbigier,
P., Brnhofer, C., Buchmann, N., Gilmanov, T., Granier, A., Grünwald, T.,
Havránková, K., Ilvesniemi, H., Janous, D., Knohl, A., Laurila, T.,
Lohila, A., Loustau, D., Matteucci, G., Meyers, T., Miglietta, F., Ourcival,
J.-M., Pumpanen, J., Rambal, S., Rotenberg, E., Sanz, M., Tenhunen, J.,
Seufert, G., Vaccari, F., Vesala, T., Yakir, D., and Valentini, R.: On the
separation of net ecosystem exchange into assimilation and ecosystem
respiration: review and improved algorithm, Glob. Change Biol., 11,
1424–1439, https://doi.org/10.1111/j.1365-2486.2005.001002.x, 2005.
Rowland, L., da Costa, A. C., Galraith, D. R., Oliveira, R. S., Binks, O.
J., Oliveira, A. A., and Meir, P.: Death from drought in tropical forests is
triggere by hydraulics not carbon starvation, Nature, 528, 119–124,
https://doi.org/10.1038/nature15539, 2015.
Sabajo, C. R., le Maire, G., June, T., Meijide, A., Roupsard, O., and Knohl, A.: Expansion of oil palm and other cash crops causes an increase of the land surface temperature in the Jambi province in Indonesia, Biogeosciences, 14, 4619–4635, https://doi.org/10.5194/bg-14-4619-2017, 2017.
Santoso, A., Mcphaden, M. J., and Cai, W.: The defining
characteristics of ENSO extremes and the strong 215/2016 El Niño,
Rev. Geophys., 55, 1079–1129, https://doi.org/10.1002/2017RG000560, 2017.
Sellers, P. J., Mintz, Y., Sud, Y. C., and Dalcher, A.: A simple biosphere
model (SiB) for use within General Circulation Models, J.
Atmos. Sci., 43, 505–531, 1986.
Sigau, C. U. and Hamid, H. A.: Soil CO2 efflux of oil palm and rubber
plantation in 6-year-old and 22-year-old chronosequence, Pertanika Jounal of
Tropical Agricultural Science, 41, 1217–1231, 2018.
Slot, M., Rey-Sánchez, C., Gerber, S., Lichstein, J. W., Winter, K., and
Kitajima, K.: Thermal acclimation of leaf respiration of tropical trees and
lianas: response to experimental canopy warming, and consequences for
tropical carbon balance, Glob. Change Biol., 20, 2915–2926, https://doi.org/10.1111/gcb.12563, 2014.
Steiner, A. L., Mermelstein, D., Cheng, S. J., Twine, T. E., and Oliphant, A.:
Observed impact of atmospheric aerosols on the surface energy budget, Earth
Interact., 17, 1–22, https://doi.org/10.1175/2013EI000523.1, 2013.
Stiegler, C. and Ali, A. A.: Model code and meteorological data, available at: https://github.com/CbioST/ENSO_OilPalm, last access: 27 July 2019.
Sun, C., Ca, H., Shao, H., Lei, X., and Xiao, Y.: Growth and physiological
responses to water and nutrient stress in oil palm, Afr. J
Biotechnol., 10, 10465–10471, https://doi.org/10.5897/AJB11.463, 2011.
Tangang, F.: Climate change: is Southeast Asia up to the challenge?:
the roles of climate variability and climate change on smoke haze
occurrences in Southeast Asia region, edited by: Kitchen, N., London
School of Economics and Political Science, London, UK, 2010.
Thompson, A. M., Witte, J. C., Hudson, R. D., Guo, H., Herman, J. R., and
Fujiwara, M.: Tropical tropospheric ozone and biomass burning, Science, 291,
2128–2132, 2001.
Turner, P. A., Field, C. B., Lobell, D. B., Sanchez, D. L., and Mach, K. J.:
Unprecedented rates of land-use transformation in modelled climate cange
mitigation pathways, Nature Sustainability, 1, 240–245,
https://doi.org/10.1038/s41893-018-0063-7, 2018.
Urban, O., Klem, K., Holišová, P., Šigut, L., Šprtová,
M., Teslová-Navrátilová, P., and Grace, J.: Impact of elevated
CO2 concentration on dynamics of leaf photosynthesis in Fagus sylvatica
is modulated by sky conditions, Environ. Pollut., 185, 271–280,
https://doi.org/10.1016/j.envpol.2013.11.009, 2014.
USDA: Oilseeds: World markets and trade, Foreign Agricultural Service,
United States Department of Agriculture, Washington: United States
Department of Agriculture, available at: https://apps.fas.usda.gov/psdonline/circulars/oilseeds.pdf (last access: 26 July 2019), 2018.
Wahid, M. B., Abdullah, S. N., and Henson, I.: Oil palm- achievements and
potential, Plant Prod. Sci., 8, 288–297, https://doi.org/10.1626/pps.8.288,
2005.
Wang, X., Wu, J., Chen, M., Xu, X., Wang, Z., Wang, B., Wang, C., Piao, S.,
Lin, W., Miao, G., Deng, M., Qiao, C., Wang, J., Xu, S., and Liu, L.: Field
evidences for the positive effects of aerosols on tree growth, Glob. Change
Biol., 24, 4983–4992, https://doi.org/10.1111/gcb.14339, 2018.
Whittingham, M. J., Stephens, P. A., Bradbury, R. B., and Freckleton, R. P.:
Why do we still use stepwise modelling in ecology and behaviour?, J.
Anim. Ecol., 75, 1182–1189, https://doi.org/10.1111/j.1365-2656.2006.01141.x, 2006.
Woittiez, L. S., van Wijk, M. T., Slingerland, M., van Noordwijk, M., and
Giller, K. E.: Yields in oil palm: A quantitative review of contributing
factors, Eur. J. Agron., 83, 57–77,
https://doi.org/10.1016/j.eja.2016.11.002, 2017.
Wolter, K.: The Southern Oscillation in surface circulation and climate over
the tropical Atlantic, eastern Pacific, and Indian Oceans as captured by
cluster analysis, J. Clim. Appl. Meteorol., 26, 540–558,
1986.
Wolter, K. and Timlin, M. S.: El Niño/Southern Oscillation behaviour
since 1871 as diagnosed in an extended multivariate ENSO index (MEI.ext),
Int. J. Climatol., 31, 1074–1087, https://doi.org/10.1002/joc.2336,
2011.
Yamasoe, M. A., von Randow, C., Manzi, A. O., Schafer, J. S., Eck, T. F., and Holben, B. N.: Effect of smoke and clouds on the transmissivity of photosynthetically active radiation inside the canopy, Atmos. Chem. Phys., 6, 1645–1656, https://doi.org/10.5194/acp-6-1645-2006, 2006.
Yue, X. and Unger, N.: Fire air pollution reduces global terrestrial
productivity, Nat. Commun., 9, 5413, https://doi.org/10.1038/s41467-018-07921-4, 2018.
Zhang, W., Feng, Z., Wang, X., and Niu, J.: Elevated ozone negatively
affects photosynthesis of current-year leaves but not previous-year leaves
in evergreen Cyclobalanopsis glauca seedlings, Environ. Pollut., 184, 676–681, https://doi.org/10.1016/j.envpol.2013.04.036, 2014.
Zhou, Z., Jiang, L., Du, E., Hu, H., Li, Y., Chen, D., and Fang, J.:
Temperature and substrate availability regulate soil respiration in the
tropical mountain rainforests, Hainan Island, China, J. Plant
Ecol., 6, 325–334, https://doi.org/10.1093/jpe/rtt034, 2013.
Zuur, A. F., Ieno, E. N., and Elphick, C. S.: A protocol for data
exploration to avoid common statistical problems, Methods Ecol. Evol., 1, 3–14, https://doi.org/10.1111/j.2041-210X.2009.00001.x, 2010.
Short summary
We show the response of a commercial oil palm plantation in Indonesia to the extreme El Niño–Southern Oscillation (ENSO) event in 2015. Our measurements and model suggest that without human-induced forest fires and related smoke emissions, the observed negative impact on oil palm carbon dioxide greenhouse gas fluxes, carbon accumulation and yield due to ENSO-related drought would have been less pronounced. With respect to climate change we highlight the importance of fire prevention in the area.
We show the response of a commercial oil palm plantation in Indonesia to the extreme El...
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