Articles | Volume 19, issue 11
https://doi.org/10.5194/bg-19-2921-2022
© Author(s) 2022. 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-19-2921-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
15 Jun 2022
Research article |
| 15 Jun 2022
| 15 Jun 2022
Massive warming-induced carbon loss from subalpine grassland soils in an altitudinal transplantation experiment
Matthias Volk
CORRESPONDING AUTHOR
Climate and Agriculture, Agroscope, Reckenholzstrasse 191, 8046
Zurich, Switzerland
Matthias Suter
Forage Production and Grassland Systems, Agroscope, Reckenholzstrasse
191, 8046 Zurich, Switzerland
Anne-Lena Wahl
Climate and Agriculture, Agroscope, Reckenholzstrasse 191, 8046
Zurich, Switzerland
Seraina Bassin
Climate and Agriculture, Agroscope, Reckenholzstrasse 191, 8046
Zurich, Switzerland
Pädagogische Hochschule Schaffhausen, Ebnatstrasse 80, 8200
Schaffhausen, Switzerland
Related authors
Matthias Volk, Matthias Suter, Anne-Lena Wahl, and Seraina Bassin
Biogeosciences, 18, 2075–2090, https://doi.org/10.5194/bg-18-2075-2021, https://doi.org/10.5194/bg-18-2075-2021, 2021
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Grassland ecosystem services like forage production and greenhouse gas storage in the soil depend on plant growth.
In an experiment in the mountains with warming treatments, we found that despite dwindling soil water content, the grassland growth increased with up to +1.3 °C warming (annual mean) compared to present temperatures. Even at +2.4 °C the growth was still larger than at the reference site.
This suggests that plant growth will increase due to global warming in the near future.
Matthias Volk, Jan Enderle, and Seraina Bassin
Biogeosciences, 13, 3807–3817, https://doi.org/10.5194/bg-13-3807-2016, https://doi.org/10.5194/bg-13-3807-2016, 2016
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Grasslands hold 28 % of global soil organic carbon (SOC). We studied carbon-fluxes and -pools in subalpine grassland under atmospheric nitrogen (N) deposition (air pollution) treatment. Unlike plant yield, SOC and CO2 gains were largest at intermediate, not maximum N deposition. Thus, N deposition driven plant yield increases may not be considered as a valid proxy for ecosystem C-pool increases and the biological sink for CO2 greenhouse gas may be smaller under higher N deposition.
Matthias Volk, Matthias Suter, Anne-Lena Wahl, and Seraina Bassin
Biogeosciences, 18, 2075–2090, https://doi.org/10.5194/bg-18-2075-2021, https://doi.org/10.5194/bg-18-2075-2021, 2021
Short summary
Short summary
Grassland ecosystem services like forage production and greenhouse gas storage in the soil depend on plant growth.
In an experiment in the mountains with warming treatments, we found that despite dwindling soil water content, the grassland growth increased with up to +1.3 °C warming (annual mean) compared to present temperatures. Even at +2.4 °C the growth was still larger than at the reference site.
This suggests that plant growth will increase due to global warming in the near future.
Claudia Hahn, Andreas Lüscher, Sara Ernst-Hasler, Matthias Suter, and Ansgar Kahmen
Biogeosciences, 18, 585–604, https://doi.org/10.5194/bg-18-585-2021, https://doi.org/10.5194/bg-18-585-2021, 2021
Short summary
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While existing studies focus on the immediate effects of drought events on grassland productivity, long-term effects are mostly neglected. But, to conclude universal outcomes, studies must consider comprehensive ecosystem mechanisms. In our study, we found that the resistance of growth rates to drought in grasses varies across seasons, and positive legacy effects of drought indicate a high resilience. The high resilience compensates for immediate drought effects on grasses to a large extent.
Matthias Volk, Jan Enderle, and Seraina Bassin
Biogeosciences, 13, 3807–3817, https://doi.org/10.5194/bg-13-3807-2016, https://doi.org/10.5194/bg-13-3807-2016, 2016
Short summary
Short summary
Grasslands hold 28 % of global soil organic carbon (SOC). We studied carbon-fluxes and -pools in subalpine grassland under atmospheric nitrogen (N) deposition (air pollution) treatment. Unlike plant yield, SOC and CO2 gains were largest at intermediate, not maximum N deposition. Thus, N deposition driven plant yield increases may not be considered as a valid proxy for ecosystem C-pool increases and the biological sink for CO2 greenhouse gas may be smaller under higher N deposition.
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Nadav Bekin and Nurit Agam
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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
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Doaa Aboelyazeed, Chonggang Xu, Forrest M. Hoffman, Jiangtao Liu, Alex W. Jones, Chris Rackauckas, Kathryn Lawson, and Chaopeng Shen
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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.
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.
Pascal Wintjen, Frederik Schrader, Martijn Schaap, Burkhard Beudert, and Christian Brümmer
Biogeosciences, 19, 389–413, https://doi.org/10.5194/bg-19-389-2022, https://doi.org/10.5194/bg-19-389-2022, 2022
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Fluxes of total reactive nitrogen (∑Nr) over a low polluted forest were analyzed with regard to their temporal dynamics. Mostly deposition was observed with median fluxes ranging from −15 to −5 ng N m−2 s−1, corresponding to a range of deposition velocities from 0.2 to 0.5 cm s−1. While seasonally changing contributions of NH3 and NOx to the ∑Nr signal were found, we estimate an annual total N deposition (dry+wet) of 12.2 and 10.9 kg N ha−1 a−1 in the 2 years of observation.
Thomas M. Blattmann
Biogeosciences, 19, 359–373, https://doi.org/10.5194/bg-19-359-2022, https://doi.org/10.5194/bg-19-359-2022, 2022
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This work enunciates the possibility of kerogen oxidation contributing to atmospheric CO2 increase in the wake of glacial episodes. This hypothesis is substantiated by several lines of independent evidence synthesized in this contribution. The author hypothesizes that the deglaciation of kerogen-rich lithologies in western Canada contributed to the characteristic deglacial increase in atmospheric CO2.
Juliana Gil-Loaiza, Joseph R. Roscioli, Joanne H. Shorter, Till H. M. Volkmann, Wei-Ren Ng, Jordan E. Krechmer, and Laura K. Meredith
Biogeosciences, 19, 165–185, https://doi.org/10.5194/bg-19-165-2022, https://doi.org/10.5194/bg-19-165-2022, 2022
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We evaluated a new diffusive soil probe integrated with high-resolution gas analyzers to measure soil gases in real time at a centimeter scale. Using columns with simple silica and soil, we captured changes in carbon dioxide (CO2), volatile organic compounds (VOCs), and nitrous oxide (N2O) with its isotopes to distinguish potential nutrient sources and microbial metabolism. This approach will advance the use of soil gases as important signals to understand and monitor soil fertility and health.
Yujie Wang and Christian Frankenberg
Biogeosciences, 19, 29–45, https://doi.org/10.5194/bg-19-29-2022, https://doi.org/10.5194/bg-19-29-2022, 2022
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Modeling vegetation canopy is important in predicting whether the land remains a carbon sink to mitigate climate change in the near future. Vegetation canopy model complexity, however, impacts the model-predicted carbon and water fluxes as well as canopy fluorescence, even if the same suite of model inputs is used. Given the biases caused by canopy model complexity, we recommend not misusing parameters inverted using different models or assumptions.
Håkan Pleijel, Jenny Klingberg, Michelle Nerentorp, Malin C. Broberg, Brigitte Nyirambangutse, John Munthe, and Göran Wallin
Biogeosciences, 18, 6313–6328, https://doi.org/10.5194/bg-18-6313-2021, https://doi.org/10.5194/bg-18-6313-2021, 2021
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Mercury is a problematic metal in the environment. It is crucial to understand the Hg circulation in ecosystems. We explored the mercury concentration in foliage from a diverse set of plants, locations and sampling periods to study the accumulation of Hg in leaves–needles over time. Mercury was always higher in older tissue: in broadleaved trees, conifers and wheat. Specific leaf area, the leaf area per unit leaf mass, turned out to be critical for Hg accumulation in leaves–needles.
Cited articles
Ammann, C., Flechard, C. R., Leifeld, J., Neftel, A. and Fuhrer, J.: The
carbon budget of newly established temperate grassland depends on management
intensity, Agr. Ecosyst. Environ., 121, 5–20, 2007.
Ammann, C., Spirig, C., Leifeld, J., and Neftel, A.: Assessment of the nitrogen and carbon budget of two managed temperate grassland fields, Agr. Ecosyst. Environ., 133, 150–162, 2009.
Ammann, C., Neftel, A., Jocher, M., Fuhrer, J., and Leifeld, J.: Effect of management and weather variations on the greenhouse gas budget of two
grasslands during a 10-year experiment, Agr. Ecosyst. Environ., 292, 106814, https://doi.org/10.1016/j.agee.2019.106814, 2020.
Bahn, M., Rodeghiero, M., Anderson-Dunn, M., Dore, S., Gimeno, C.,
Drösler, M., Williams, M., Ammann, C., Berninger, C., Flechard, C.,
Jones, S., Balzarolo, M., Kumar, S., Newesely, C., Priwitzer, T., Raschi,
A., Siegwolf, R., Susiluoto, S., Tenhunen, J., Wohlfahrt, G., and Cernusca,
A.: Soil respiration in European grasslands in relation to climate and
assimilate supply, Ecosystems, 11, 1352–1367, 2008.
Bassin, S., Werner, R. A., Sörgel, K., Volk, M., Buchmann, N., and
Fuhrer, J.: Effects of combined ozone and nitrogen deposition on the in situ
properties of eleven key plant species of a subalpine pasture, Oecologia,
158, 747–756, 2009.
Bassin, S., Käch, D., Valsangiacomo, A., Mayer, J., Oberholzer, H. R.,
Volk, M., and Fuhrer, J.: Elevated ozone and nitrogen deposition affect
nitrogen pools of subalpine grassland, Environ. Pollut., 201, 67–74,
2015.
Bates, D., Mächler, M., Bolker, B., and Walker S.: Fitting linear
mixed-effects models using lme4, J. Stat. Softw., 67, 1–48,
2015.
Berninger, F., Susiluoto, S., Gianelle, D., and Balzarolo, M.: Management and site effects on carbon balances of European mountain meadows and rangelands,
Boreal Environ. Res., 20, 748–760, 2015.
Bobbink, R., Hicks, K., Galloway, J., Spranger, T., Alkemade, R., Ashmore,
M., Bustamante, M., Cinderby, S., Davidson, E., Dentener, F., Emmett, B.,
Erisman, J. W., Fenn, M., Gilliam, F., Nordin, A., Pardo, L., and De Vries,
W.: Global assessment of nitrogen deposition effects on terrestrial plant
diversity: a synthesis, Ecol. Appl., 20, 30–59, 2010.
Conant, R. T., Ryan, M. G., Ågren, G. I., Birge, H. E., Davidson, E. A.,
Eliasson, P. E., Evans, S. E., Frey, S. D., Giardina, C. P., Hopkins, F. M.,
Hyvönen, R., Kirschbaum, M. U. F., Lavallee, J. M., Leifeld, J., Parton,
W. J., Steinweg, J. M., Wallenstein, M. D., Wetterstedt, J. Å. M., and Bradford, M. A.: Temperature and soil organic matter decomposition
rates–synthesis of current knowledge and a way forward, Glob. Change Biol., 17, 3392–3404, 2011.
Conen, F., Leifeld, J., Seth, B., and Alewell, C.: Warming mineralises young and old soil carbon equally, Biogeosciences, 3, 515–519, https://doi.org/10.5194/bg-3-515-2006, 2006.
Core Writing Team: IPCC, 2014: Climate change 2014: Synthesis Report,
Contribution of Working Groups I, II and III to the Fifth Assessment Report
of the Intergovernmental Panel on Climate Change, edited by: Pachauri, R. K.
and Meyer, L. A., IPCC, Geneva, Switzerland, 151 pp., 2014.
Crowther, T. W., Todd-Brown, K. E., Rowe, C. W., Wieder, W. R., Carey, J.
C., Machmuller, M. B., Snoek, B. L., Fang, S., Zhou, G., Allison, S. D.,
Blair, J. M., Bridgham, S. D., Burton, A. J., Carrillo, Y., Reich, P. B.,
Clark, J. S., Classen, A. T., Dijkstra, F. A., Elberling, B., Emmett, B. A.,
Estiarte, M., Frey, S. D., Guo, J., Harte, J., Jiang, L., Johnson, B. R.,
Kröel-Dulay, G., Larsen, K. S., Laudon, H., Lavallee, J. M., Luo, Y.,
Lupascu, M., Ma, L. N., Marhan, S., Michelsen, A., Mohan, J., Niu, S.,
Pendall, E., Peñuelas, J., Pfeifer-Meister, L., Poll, C., Reinsch, S.,
Reynolds, L. L., Schmidt, I. K., Sistla, S., Sokol, N. W., Templer, P. H.,
Treseder, K. K., Welker, J. M., and Bradford, M. A.: Quantifying global soil
carbon losses in response to warming, Nature, 540, 104–108, 2016.
Giardina, C. P., Binkley, D., Ryan, M. G., Fownes, J. H., and Senock, R. S.:
Belowground carbon cycling in a humid tropical forest decreases with
fertilization, Oecologia, 139, 545–550, 2004.
Heimann, M. and Reichstein, M.: Terrestrial ecosystem carbon dynamics and
climate feedbacks, Nature, 451, 289–292, 2008.
Hoeppner, S. S. and Dukes, J. S.: Interactive responses of old-field plant
growth and composition to warming and precipitation, Glob. Change Biol.,
18, 1754–1768, 2012.
Hörtnagl, L., Barthel, M., Buchmann, N., Eugster, W., Butterbach-Bahl,
K., Díaz-Pinés, E., Zeeman, M., Klumpp, K., Kiese, R., Bahn, M.,
Hammerle, A., Lu, H., Ladreiter-Knauss, T., Burril S., and Merbold, L.:
Greenhouse gas fluxes over managed grasslands in Central Europe, Glob. Change Biol., 24, 1843–1872, 2018.
Jia, J., Cao, Z., Liu, C., Zhang, Z., Lin, L. I., Wang, Y., Haghipour, N.,
Wacker, L., Bao, H., Dittmar, T., Simpson, M. J., Yang, H., Crowther, T. W.,
Eglinton, T. I., He J.-S., and Feng, X.: Climate warming alters subsoil but
not topsoil carbon dynamics in alpine grassland, Glob. Change Biol.,
25, 4383–4393, 2019.
Jobbágy, E. G. and Jackson, R. B.: The vertical distribution of soil
organic carbon and its relation to climate and vegetation, Ecol.
Appl., 10, 423–436, 2000.
Jones, C., McConnell, C., Coleman, K., Cox, P., Falloon, P., Jenkinson, D.,
and Powlson, D.: Global climate change and soil carbon stocks; predictions
from two contrasting models for the turnover of organic carbon in soil,
Glob. Change Biol., 11, 154–166, 2005.
Jung, C. G., Xu, X., Niu, S., Liang, J., Chen, X., Shi, Z., Jiang, L., and Luo, Y.: Experimental warming amplified opposite impacts of
drought vs. wet extremes on ecosystem carbon cycle in a tallgrass prairie,
Agr. Forest Meteorol., 276, 107635, https://doi.org/10.1016/j.agrformet.2019.107635, 2019.
Kenward, M. G. and Roger, J. H.: Small sample inference for fixed effects
from restricted maximum likelihood, Biometrics, 53, 983–997, 1997.
Kreyling, J., Grant, K., Hammerl, V., Arfin-Khan, M. A., Malyshev, A. V.,
Peñuelas, J., Pritsch, K., Sardans, J., Schloter, M., Schuerings, J.,
Jentsch, A., and Beierkuhnlein, C.: Winter warming is ecologically more
relevant than summer warming in a cool-temperate grassland, Scientific
Reports, 9, 1–9, 2019.
Leifeld, J., Bassin, S., and Fuhrer, J.: Carbon stocks in Swiss agricultural
soils predicted by land-use, soil characteristics, and altitude,
Agr. Ecosyst. Environ., 105, 255–266, 2005.
Leifeld, J., Zimmermann, M., Fuhrer, J., and Conen, F.: Storage and turnover
of carbon in grassland soils along an elevation gradient in the Swiss Alps,
Glob. Change Biol., 15, 668–679, 2009.
Leifeld, J., Bassin, S., Conen, F., Hajdas, I., Egli, M., and Fuhrer, J.: Control of soil pH on turnover of belowground organic matter in subalpine grassland, Biogeochemistry, 112, 59–69, 2013.
Liu, H., Mi, Z., Lin, L. I., Wang, Y., Zhang, Z., Zhang, F., Wang, H., Liu,
L., Zhu, B., Cao, G., Zhao, Z., Sanders, N. J., Classen, A. T., Reich, P. B., and He, J. S.: Shifting plant species composition in response to climate change stabilizes grassland primary production, P. Natl. Acad. Sci. USA, 115, 4051–4056, 2018.
Lloyd, J. and Taylor, J. A.: On the temperature dependence of soil
respiration, Funct. Ecol., 8, 315–323, 1994.
Lu, M., Zhou, X., Luo, Y., Yang, Y., Fang, C., Chen, J., and Li, B.: Minor
stimulation of soil carbon storage by nitrogen addition: a meta-analysis,
Agr. Ecosyst. Environ., 140, 234–244, 2011.
Magnani, F., Mencuccini, M., Borghetti, M., Berbigier, P., Berninger, F.,
Delzon, S., Grelle, A., Hari, P., Jarvis, P. J., Kolari, P., Kowalski, A.
S., Lankreijer, H., Law, B. E., Lindroth, A., Loustau, D., Manca, G.,
Moncrieff, J. B., Rayment, M., Tedeschi, V., Valentini, R., and Grace, J.:
The human footprint in the carbon cycle of temperate and boreal forests,
Nature, 447, 849–851, 2007.
Nakagawa, S. and Schielzeth, H.: A general and simple method for obtaining
R2 from generalized linear mixed-effects models, Methods Ecol.
Evol., 4, 133–142, 2013.
Phoenix, G. K., Emmett, B. A., Britton, A. J., Caporn, S. J. M., Dise, N. B.,
Helliwell, R., Jones, L., Leake, J. R., Leith, I. D., Sheppard, L. J.,
Sowerby, A., Pilkington, M. G., Rowe, E. C., Ashmore, M. R., and Power, S.
A.: Impacts of atmospheric nitrogen deposition: responses of multiple plant
and soil parameters across contrasting ecosystems in long-term field
experiments, Glob. Change Biol., 18, 1197–1215, 2012.
Poeplau, C., Kätterer, T., Leblans, N. I., and Sigurdsson, B. D.:
Sensitivity of soil carbon fractions and their specific stabilization
mechanisms to extreme soil warming in a subarctic grassland, Glob. Change Biol., 23, 1316–1327, 2017.
Poorter, H., Niklas, K. J., Reich, P. B., Oleksyn, J., Poot, P., and Mommer,
L.: Biomass allocation to leaves, stems and roots: meta-analyses of
interspecific variation and environmental control, New Phytol., 193,
30–50, 2012.
Post, W. M., Emanuel, W. R., Zinke, P. J., and Stangenberger, A. G.: Soil
carbon pools and world life zones, Nature, 298, 156–159, 1982.
Pries, C. E. H., Castanha, C., Porras, R. C., and Torn, M. S.: The
whole-soil carbon flux in response to warming, Science, 355,
1420–1423, 2017.
R Core Team: A language and environment for statistical computing, R
Foundation for Statistical Computing, Vienna, Austria, https://www.r-project.org/, last access: 18 March 2021.
Reynolds, L. L., Johnson, B. R., Pfeifer-Meister, L., and Bridgham, S. D.:
Soil respiration response to climate change in Pacific Northwest prairies is
mediated by a regional Mediterranean climate gradient, Glob. Change
Biol., 21, 487–500, 2015.
Rihm, B. and Achermann, B.: Critical Loads of Nitrogen and their
Exceedances. Swiss contribution to the effects-oriented work under the
Convention on Long-range Transboundary Air Pollution (UNECE), Federal Office
for the Environment, Bern, Environmental studies no. 1642, 78 pp., 2016.
Rihm, B. and Kurz, D.: Deposition and critical loads of nitrogen in
Switzerland, in: Acid rain 2000, Springer, Dordrecht, 1223–1228, https://doi.org/10.1007/978-94-007-0810-5_5, 2001.
Rogger, J., Hörtnagl, L., Buchmann, N., and Eugster, W.: Carbon dioxide
fluxes of a mountain grassland: Drivers, anomalies and annual budgets,
Agr. Forest Meteorol., 314, 108801, https://doi.org/10.1016/j.agrformet.2021.108801, 2022.
Rustad, L. E., Campbell, J., Marion, G., Norby, R., Mitchell, M., Hartley,
A., Cornelissen, J. H. C., and Gurevitch, J.: A meta-analysis of the
response of soil respiration, net nitrogen mineralization, and aboveground
plant growth to experimental ecosystem warming, Oecologia, 126, 543–562,
2001.
Ryan, E. M., Ogle, K., Zelikova, T. J., LeCain, D. R., Williams, D. G.,
Morgan, J. A., and Pendall, E.: Antecedent moisture and temperature
conditions modulate the response of ecosystem respiration to elevated CO2
and warming, Glob. Change Biol., 21, 2588–2602, 2015.
Schlesinger, W. H.: Carbon balance in terrestrial detritus, Annu. Rev. Ecol. Syst., 8, 51–81, 1977.
Smith, J. O., Smith, P., Wattenbach, M., Zaehle, S., Hiederer, R., Jones, R.
J., Montanarella, L., Rounsewell, M. D. A., Reginster, I., and Ewert, F.:
Projected changes in mineral soil carbon of European croplands and
grasslands, 1990–2080, Glob. Change Biol., 11, 2141–2152, 2005.
Soussana, J. F., Allard, V., Pilegaard, K., Ambus, P., Amman, C., Campbell,
C., Ceschia, E., Clifton-Brown, J., Czobel, S., Domingues, R., Flechard, C.,
Fuhrer, J., Hensen, A., Horvath, L., Jones, M., Kasper, G., Martin, C.,
Nagy, Z., Neftel, A., Raschi, A., Baronti, S., Rees, R. M., Skiba, U.,
Stefani, P., Manca, G.,
Sutton, M., Tuba, Z., and Valentini, R.: Full accounting of the greenhouse gas
(CO2, N2O, CH4) budget of nine European grassland sites, Agr.
Ecosyst. Environ., 121, 121–134, 2007.
Subke, J. A. and Bahn, M.: On the `temperature sensitivity' of soil
respiration: can we use the immeasurable to predict the unknown?, Soil
Biology and Biochemistry, 42, 1653–1656, 2010.
Thimonier, A., Kosonen, Z., Braun, S., Rihm, B., Schleppi, P., Schmitt, M.,
Seitler, E., Waldner, P., and Thöni, L.: Total deposition of nitrogen in
Swiss forests: Comparison of assessment methods and evaluation of changes
over two decades, Atmos. Environ., 198, 335–350, 2019.
Van Der Wal, R., and Stien, A.: High-arctic plants like it hot: A long-term
investigation of between-year variability in plant biomass, Ecology, 95, 3414–3427, 2014.
Vitousek, P. M., Aber, J., Howarth, R. W., Likens, G. E., Matson, P. A.,
Schindler, D. W., Schlesinger, W. H., and Tilman, G. D.: Human alteration of the
global nitrogen cycle: causes and consequences, Ecol. Appl., 7,
737–750, 1997.
Volk, M., Obrist, D., Novak, K., Giger, R., Bassin, S., and Fuhrer, J.:
Subalpine grassland carbon dioxide fluxes indicate substantial carbon losses
under increased nitrogen deposition, but not at elevated ozone
concentration, Glob. Change Biol., 17, 366–376, 2011.
Volk, M., Wolff, V., Bassin, S., Ammann, C., and Fuhrer, J.: High tolerance
of subalpine grassland to long-term ozone exposure is independent of N input
and climatic drivers, Environ. Pollut., 189, 161–168, 2014.
Volk, M., Enderle, J., and Bassin, S.: Subalpine grassland carbon balance during 7 years of increased atmospheric N deposition, Biogeosciences, 13, 3807–3817, https://doi.org/10.5194/bg-13-3807-2016, 2016.
Volk, M., Bassin, S., Lehmann, M. F., Johnson, M. G., and Andersen, C. P.:
13C isotopic signature and C concentration of soil density fractions illustrate reduced C allocation to subalpine grassland soil under high atmospheric N deposition, Soil Biol. Biochem., 125, 178–184, 2018.
Volk, M., Suter, M., Wahl, A.-L., and Bassin, S.: Subalpine grassland productivity increased with warmer and drier conditions, but not with higher N deposition, in an altitudinal transplantation experiment, Biogeosciences, 18, 2075–2090, https://doi.org/10.5194/bg-18-2075-2021, 2021.
Volk, M., Suter, M., Wahl, A.-L., and Bassin, S.: Dataset for 'Massive warming-induced carbon loss from subalpine grassland soils in an altitudinal transplantation experiment' Volk et al. 2022, Zenodo [data set], https://doi.org/10.5281/zenodo.6558331, 2022.
Walker, T. W., Janssens, I. A., Weedon, J. T., Sigurdsson, B. D., Richter,
A., Peñuelas, J., Leblans N. I. W., Bahn, M., Bartrons, M., De Jonge,
C., Fuchslueger, L., Gargallo-Garriga, A., Gunnarsdóttir, G. E.,
Marañón-Jiménez, S., Oddsdóttir, E. S., Ostonen, I.,
Poeplau, C., Prommer, J., Radujković, D., Sardans, J., Sigurðsson,
P., Soong, J. L., Vicca, S., Wallander, H., Ilieva-Makulec, K., and
Verbruggen, E.: A systemic overreaction to years versus decades of warming
in a subarctic grassland ecosystem, Nature Ecology and Evolution, 4, 101–108, 2020.
Wang, N., Quesada, B., Xia, L., Butterbach-Bahl, K., Goodale, C. L., and Kiese, R.: Effects of climate warming on carbon fluxes in grasslands–A
global meta-analysis, Glob. Change Biol., 25, 1839–1851, 2019.
Wood, S. N.: Generalized Additive Models. An Introduction with R, 2nd
edn., Chapman and Hall/CRC, London, https://doi.org/10.1201/9781315370279, 2017.
Wüst-Galley, C., Volk, M., and Bassin, S.: Interaction of climate change and nitrogen deposition on subalpine pastures, J. Veg. Sci., 32, e12946, https://doi.org/10.1111/jvs.12946, 2021.
Xu, X., Shi, Z., Chen, X., Lin, Y., Niu, S., Jiang, L., Luo, R., and Luo,
Y.: Unchanged carbon balance driven by equivalent responses of production
and respiration to climate change in a mixed-grass prairie, Glob. Change
Biol., 22, 1857–1866, 2016.
Zhou, T., Shi, P., Hui, D., and Luo, Y.: Global pattern of temperature
sensitivity of soil heterotrophic respiration (Q10) and its implications for
carbon-climate feedback, J. Geophys. Res., 114, G02016, https://doi.org/10.1029/2008JG000850, 2009.
Short summary
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.
Because soils are an important sink for greenhouse gasses, we subjected sub-alpine grassland to...
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