Articles | Volume 12, issue 20
https://doi.org/10.5194/bg-12-5915-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/bg-12-5915-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
16 Oct 2015
Research article |
| 16 Oct 2015
Organically fertilized tea plantation stimulates N2O emissions and lowers NO fluxes in subtropical China
Z. Yao
State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, People's Republic of China
Y. Wei
State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, People's Republic of China
C. Liu
CORRESPONDING AUTHOR
State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, People's Republic of China
X. Zheng
State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, People's Republic of China
B. Xie
Key Laboratory of Coastal Zone Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, People's Republic of China
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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.
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.
Cited articles
Akiyama, H. and Tsuruta, H.: Nitrous oxide, nitric oxide, and nitrogen dioxide fluxes from soils after manure and urea application, J. Environ. Qual., 32, 423–431, 2003a.
Akiyama, H. and Tsuruta, H.: Effect of organic matter application on N2O, NO, and NO2 fluxes from an Andisol field, Global Biogeochem. Cy., 17, 1100, https://doi.org/10.1029/2002GB002016, 2003b.
Akiyama, H., Yan, X., and Yagi, K.: Estimations of emission factors for fertilizer-induced direct N2O emissions from agricultural soils in Japan: summary of available data, Soil Sci. Plant Nutr., 52, 774–787, 2006.
Anderson, I. C. and Levine, J. S.: Relative rates of nitric oxide and nitrous oxide production by nitrifiers, denitrifiers and nitrates respirers, Appl. Environ. Microb., 51, 938–944, 1986.
Baumgärtner, M., Koschorreck, M., and Conrad, R.: Oxidative consumption of nitric oxide by heterotrophic bacteria in soil, FEMS Microbiol. Ecol., 19, 165–170, 1996.
Bouwman, A. F., Boumans, L. J. M., and Batjes, N. H.: Emissions of N2O and NO from fertilized fields: Summary of available measurement data, Global Biogeochem. Cy., 16, 1058, https://doi.org/10.1029/2001GB001811, 2002.
Burger, M., Jackson, L. E., Lundquist, E., Louie, D. T., Miller, R. L., Rolston, D. E., and Scow, K. M.: Microbial responses and nitrous oxide emissions during wetting and drying of organically and conventionally managed soils under tomatoes, Biol. Fert. Soils, 42, 109–118, 2005.
Conrad, R.: Microbiological and biochemical background of production and consumption of NO and N2O in soil, Trace Gas Exchnage in Forest Ecosystems, 3, 3–33, 2002.
Davidson, E. A.: Fluxes of nitrous oxide and nitric oxide from terrestrial ecosystems, in: Microbial Production and Consumption of Greenhouse Gases: Methane, Nitrogen oxides, and Halomethanes, edited by: Rogers, J. E. and Whitman, W. B., American Society of Microbiology, Washington DC, 219–235, 1991.
Davidson, E. A.: Sources of nitric oxide and nitrous oxide following wetting of dry soil, Soil Sci. Soc. Am. J., 56, 95–102, 1992.
Davidson, E. A. and Kingerlee, W.: A global inventory of nitric oxide emissions from soils, Nutr. Cycl. Agroecosys., 48, 37–50, 1997.
Deng, J., Zhou, Z., Zheng, X., Liu, C., Yao, Z., Xie, B., Cui, F., Han, S., and Zhu, J.: Annual emissions of nitrous oxide and nitric oxide from rice-wheat rotation and vegetable fields: a case study in the Tai-Lake region, China, Plant Soil, 360, 37–53, 2012.
Dunfield, P. and Knowles, R.: Organic matter, heterotrophic activity, and NO consumption in soils, Glob. Change Biol., 4, 199–207, 1998.
Fu, X., Li, Y., Su, W., Shen, J., Xiao, R., Tong, C., and Wu, J.: Annual dynamics of N2O emissions from a tea field in southern subtropical China, Plant Soil Environ., 58, 373–378, 2012.
Galloway, J. N., Townsend, A. R., Erisman, J. W., Bekunda, M., Cai, Z., Freney, J. R., Martinelli, L. A., Seitzinger, S. P., and Sutton, M. A.: Transformation of the nitrogen cycle: Recent trends, questions, and potential solutions, Science, 320, 889–892, 2008.
Gogoi, B. and Baruah, K. K.: Nitrous oxide emission from tea (Camellia sinensis (L.) O. kuntze)-planted soils of North East India and soil parameters associated with the emission, Curr. Sci., 101, 531–536, 2011.
Granli, T. and Bockman, O. C.: Processes that from N2O in soils, nitrogen oxide from agriculture, Norwegian Journal of Agricultural Sciences, 12, 18–22, 1994.
Gu, J., Zheng, X., Wang, Y., Ding, W., Zhu, B., Chen, X., Wang, Y., Zhao, Z., Shi, Y., and Zhu, J.: Regulatory effects of soil properties on background N2O emissions from agricultural soils in China, Plant Soil, 295, 53–65, 2007.
Han, W., Xu, J., Wei, K., Shi, Y., and Ma, L.: Estimation of N2O emission from tea garden soils, their adjacent vegetable garden and forest soils in eastern China, Environmental Earth Sciences, 70, 2495–2500, 2013a.
Han, W., Xu, J., Wei, K., Shi, R., and Ma, L.: Soil carbon sequestration, plant nutrients and biological activities affected by organic farming system in tea (Camellia sinensis (L.) O. Kuntze) fields, Soil Sci. Plant Nutr., 59, 727–739, 2013b.
Harrison, R., Yamulki, S., Goulding, K. W. T., and Webster, C. P.: Effect of fertilizer application on NO and N2O fluxes from agricultural fields, J. Geophys. Res., 100, 25923–25931, 1995.
Hayakawa, A., Akiyama, H., Sudo, S., and Yagi, K.: N2O and NO emissions from an Andisol field as influenced by pelleted poultry manure, Soil Biol. Biochem., 41, 521–529, 2009.
Hirono, Y. and Nonaka, K.: Nitrous oxide emissions from green tea fields in Japan: contribution of emissions from soil between rows and soil under the canopy of tea plants, Soil Sci. Plant Nutr., 58, 384–392, 2012.
Huang, Y. and Li, D.: Soil nitric oxide emissions from terrestrial ecosystems in China: a synthesis of modeling and measurements, Scientific Report, 4, 7406, https://doi.org/10.1038/srep07406, 2014.
Hutchinson, G. L. and Mosier, A. R.: Improved soil cover method for field measurement of nitrous oxide fluxes, Soil Sci. Soc. Am. J., 45, 311–316, 1981.
Hutchinson, G. L. and Livingston, G. P.: Use of chamber systems to measure trace gas fluxes, in: Agricultural Ecosystem Effects on Trace Gases and Global Climate, edited by: Harper, L. A., Am. Soc. Agron., Madison, Wis., 63–78, 1993.
IPCC (Intergovernmental Panel on Climate Change): IPCC Guidelines for National Greenhouse Gas Inventories [M], 4, Agriculture, Forestry and Other Land use (AFOLU), IPCC/IGES, Hayama, Japan, 2006.
IPCC (Intergovernmental Panel on Climate Change), in: Climate Change 2013: The Physical Science Basis, Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change, edited by: Stocker, T. F., Qin, D., Plattner, G. K., Tignor, M., Allen, S. K., Boschung, J., Nauels, A., Xia, Y,, Bex, V., and Midgley, P. M., Cambridge University Press, Cambridge, UK and New York, USA, 2013.
Islam, A., Chen, D., and White, R. E.: Heterotrophic and autotrophic nitrification in two acid pasture soils, Soil Biol. Biochem., 39, 972–975, 2007.
Jumadi, O., Hala, Y., and Inubushi, K.: Production and emission of nitrous oxide and responsible microorganisms in upland acid soil in Indonesia, Soil Sci. Plant Nutr., 51, 693–696, 2005.
Jumadi, O., Hala, Y., Anas, I., Ali, A., Sakamoto, K., Saigusa, M., Yagi, K., and Inubushi, K.: Community stucture of ammonia oxidizing bacteria and their potential to produce nitrous oxide and carbon dioxide in acid tea soils, Geomicrobiol. J., 25, 381–389, 2008.
Kim, D. S. and Kim, J. C.: Soil nitric and nitrous oxide emissions from agricultural and tidal flat fields in southwestern Korea, J. Environ. Eng. Sci., 1, 359–369, 2002.
Kramer, S. B., Reganold, J. P., Glover, J. D., Bohannan, B. J. M., and Mooney, H. A.: Reduced nitrate leaching and enhanced denitrifier activity and efficiency in organically fertilized soils, P. Natl. Acad. Sci. USA, 103, 4522–4527, 2006.
Kroon, P. S., Hensen, A., van den Bulk, W. C. M., Jongejan, P. A. C., and Vermeulen, A. T.: The importance of reducing the systematic error due to non-linearity in N2O flux measurements by static chambers, Nutr. Cycl. Agroecosys., 82, 175–186, 2008.
Kutzbach, L., Schneider, J., Sachs, T., Giebels, M., Nykänen, H., Shurpali, N. J., Martikainen, P. J., Alm, J., and Wilmking, M.: CO2 flux determination by closed-chamber methods can be seriously biased by inappropriate application of linear regression, Biogeosciences, 4, 1005–1025, https://doi.org/10.5194/bg-4-1005-2007, 2007.
Li, D. and Wang, X.: Nitric oxide emission from a typical vegetable field in the Pearl River Delta, China, Atmos. Environ., 41, 9498–9505, 2007.
Li, D., Wang, X., Mo, J., Sheng, G., and Fu, J.: Soil nitric oxide emissions from two subtropical humid forests in south China, J. Geophys. Res., 112, D23302, https://doi.org/10.1029/2007JD008680, 2007.
Li, Y., Fu, X., Liu, X., Shen, J., Luo, Q., Xiao, R., Li, Y. Y., Tong, C., and Wu, J.: Spatial variability and distribution of N2O emissions from a tea field during the dry season in subtropical central China, Geoderma, 193–194, 1–12, 2013.
Lin, S., Iqbal, J., Hu, R., and Feng, M.: N2O emissions from different land uses in min-subtropical China, Agr. Ecosyst. Environ., 136, 40–48, 2010.
Liu, Q., Qin, Y., Zou, J., Guo, Y., and Gao, Z.: Annual nitrous oxide emissions from open-air and greenhouse vegetable cropping systems in China, Plant Soil, 370, 223–233, 2013.
Matson, P. A., Vitousek, P. M., Livingston, G. P., and Swanberg, N. A.: Sources of variations in nitrous oxide flux from Amazonian ecosystems, J. Geophys. Res., 95, 16789–16798, 1990.
McElroy, M. B. and Wang, Y. X.: Human and animal wastes: Implications for atmospheric N2O and NOx, Global Biogeochem. Cy., 19, GB2008, https://doi.org/10.1029/2004GB002429, 2005.
Medinets, S., Skiba, U., Rennenberg, H., and Butterbach-Bahl, K.: A review of soil NO transformation: Associated processes and possible physioligical significance on organisms, Soil Biol. Biochem., 80, 92–117, 2015.
Mei, B., Zheng, X., Xie, B., Dong, H., Zhou, Z., Wang, R., Deng, J., Cui, F., Tong, H., and Zhu, J.: Nitric oxide emissions from conventional vegetable fields in southeastern China, Atmos. Environ., 43, 2762–2769, 2009.
Meijide, A., Díez, J. A., Sánchez-Martín, L., López-Fernández, S., and Vallejo, A.: Nitrogen oxide emissions from an irrigated maize crop amended with treated pig slurries and composts in a Mediterranean climate, Agr. Ecosyst. Environ., 121, 383–394, 2007.
Min, J., Shi, W., Xing, G., Powlson, D., and Zhu, Z.: Nitrous oxide emissions from vegetables grown in a polytunnel treated with high rates of applied nitrogen fertilizers in Southern China, Soil Use Manage., 28, 70–77, 2012.
Müller, C., Stevens, R. J., and Laughlin, R. J.: A 15N tracing model to analyse N transformations in old grassland soil, Soil Biol. Biochem., 36, 619–632, 2004.
Müller, C., Rütting, T., Kattge, J., Laughlin, R. J., and Stevens, R. J.: Estimation of parameters in complex 15N tracing models via Monte Carlo sampling, Soil Biol. Biochem., 39, 715–726, 2007.
Pang, X., Mu, Y., Lee, X., Fang, S., Yuan, J., and Huang, D.: Nitric oxides and nitrous oxide fluxes from typical vegetables cropland in China: effects of canopy, soil properties and field management, Atmos. Environ., 43, 2571–2578, 2009.
Petersen, S. Q., Regina, K., Pöllinger, A., Rigler, E., Valli, L., Yamulki, S., Esala, M., Fabbri, C., Syväsalo, E., and Vinther, F. P.: Nitrous oxide emissions from organic and conventional crop rotations in five European countries, Agr. Ecosyst. Environ., 112, 200–206, 2006.
Pimentel, D., Hepperly, P., Hanson, J., Douds, D., and Seidel, R.: Environmental, energetic, and economic comparisons of organic and conventional farming systems, BioScience, 55, 573–582, 2005.
Reay, D. S., Davidson, E. A., Smith, K. A., Smith, P., Melillo, J. M., Dentener, F., and Crutzen, P. J.: Global agriculture and nitrous oxide emissions, Nature Climate Change, 2, 410–416, 2012.
Skiba, U., Hargreaves, K. J., Fowler, D., and Smith, K. A.: Fluxes of nitric and nitrous oxides from agriculture soils in a cool temperature climate, Atmos. Environ., 26, 2477–2488, 1992.
Skiba, U. M., Sheppard, L. J., MacDonald, J., and Fowler, D.: Some key environmental variables controlling nitrous oxide emissions from agricultural and semi-natural soils in Scotland, Atmos. Environ., 32, 3311–3320, 1998.
Stehfest, E. and Bouwman, L.: N2O and NO emission from agricultural fields and soils under natural vegetation: summarizing available measurement data and modeling of global annual emissions, Nutr. Cycl. Agroecosys., 74, 207–228, 2006.
Syväsalo, E., Regina, K., Turtola, E., Lemola, R., and Esala, M.: Fluxes of nitrous oxide and methane, and nitrogen leaching from organically and conventionally cultivated sandy soil in western Finland, Agr. Ecosyst. Environ., 113, 342–348, 2006.
Thornton, F. C., Shurpali, N. J., Bock, B. R., and Reddy, K. C.: N2O and NO emissions from poultry litter and urea applications to Bermuda grass, Atmos. Environ., 32, 1623–1630, 1998.
Tokuda, S. and Hayatsu, M.: Nitrous oxide emission potential of 21 acidic tea field soils in Japan, Soil Sci. Plant Nutr., 47, 637–642, 2001.
Tokuda, S. and Hayatsu, M.: Nitrous oxide flux from a tea field amended with a large amount of nitrogen fertilizer and soil environmental factors controlling the flux, Soil Sci. Plant Nutr., 50, 365–374, 2004.
Valente, R. J., Thornton, F. C., and Williams, E. J.: Field comparison of static and flow-through chamber techniques for measurement of soil NO emission, J. Geophys. Res., 100, 21147–21152, 1995.
Vallejo, A., Skiba, U. M., García-Torres, L., Arce, A., López-Fernández, S., and Sánchez-Martín, L.: Nitrogen oxides emission from soils bearing a potato crop as influenced by fertilization with treated pig slurries and composts, Soil Biol. Biochem., 38, 2782–2793, 2006.
Venterea, R. T., Groffman, P. M., Verchot, L. V., Magill, A. H., Aber, J. D., and Streudler, P. A.: Nitrogen oxide gas emissions from temperate forest soils receiving long-term nitrogen inputs, Glob. Change Biol., 9, 346–357, 2003.
Wang, J., Xiong, Z., and Yan, X.: Fertilizer-induced emission factors and background emissions of N2O from vegetable fields in China, Atmos. Environ., 45, 6923–6929, 2011.
Wang, K., Zheng, X., Pihlatie, M., Vesala, T., Liu, C., Haapanala, S., Mammarella, I., Rannik, Ü., and Liu, H.: Comparison between static chamber and tunable diode laser-based eddy covariance techniques for measuring nitrous oxide fluxes from a cotton field, Agr. Forest Meteorol., 171–172, 9–19, 2013.
Wang, L., Butterly, C. R., Wang, Y., Herath, H. M. S. K., Xi. Y. G., and Xiao, X. J.: Effect of crop residue biochar on soil acidity amelioration in strongly acidic tea garden soils, Soil Use Manage., 30, 119–128, 2014.
Williams, D. L., Ineson, P., and Coward, P. A.: Temporal variations in nitrous oxide fluxes from urine-affected grassland, Soil Biol. Biochem., 31, 779–788, 1999.
Williams, E. J. and Davidson, E. A.: An intercomparison of two chamber methods for the determination of emission of nitric oxide from soil, Atmos. Environ., 27, 2107–2113, 1993.
Williams, E. J., Hutchinson, G. L., and Fehsenfeld, F. C.: NOx and N2O emissions from soil, Global Biogeochem. Cy., 6, 351–388, 1992.
Williams, P. H., Jarvis, S. C., and Dixon, E.: Emission of nitric oxide and nitrous oxide from soil under field and laboratory conditions, Soil Biol. Biochem., 30, 1885–1893, 1998.
Xue, H., Ren, X., Li, S., Wu, X., Cheng, H., Xu, B., GU, B., Yang, G., Peng, C., Ge, Y., and Chang, J.: Assessment of private economic benefits and positive environmental externalities of tea plantation in China, Environ. Monit. Assess., 185, 8501–8516, 2013.
Yamamoto, A., Akiyama, H., Naokawa, T., Miyazaki, Y., Honda, Y., Sano, Y., Nakajima, Y., and Yagi, K.: Lime-nitrogen application affects nitrification, denitrification, and N2O emission in an acidic tea soil, Biol. Fert. Soils, 50, 53–62, 2014.
Yamulki, S. and Jarvis, S. C.: Short-term effects of tillage and compaction on nitrous oxide, nitric oxide, nitrogen dioxide, methane and carbon dioxide fluxes from glassland, Biol. Fert. Soils, 36, 224–231, 2002.
Yan, G., Yao, Z., Zheng, X., and Liu, C.: Characteristics of annual nitrous and nitric oxide emissions from major cereal crops in the North China Plain under alternative fertilizer management, Agr. Ecosyst. Environ., 207, 67–78, 2015.
Yan, X., Ohara, T., and Akimoto, H.: Statistical modeling of global soil NOx emissions, Global Biogeochem. Cy., 19, GB3019, https://doi.org/10.1029/2004GB002276, 2005.
Yao, Z., Zheng, X., Xie, B., Mei, B., Wang, R., Butterbach-Bahl, K., Zhu, J., and Yin, R.: Tillage and crop residue management significantly affects N-trace gas emissions during the non-rice season of a subtropical rice-wheat rotation, Soil Biol. Biochem., 41, 2131–2140, 2009.
Yao, Z., Zhou, Z., Zheng, X., Xie, B., Liu, C., Butterbach-Bahl, K., and Zhu, J.: Effects of tillage during the nonwaterlogged period on nitrous oxide and nitric oxide emissions in typical Chinese rice-wheat rotation ecosystems, J. Geophys. Res., 115, G01013, https://doi.org/10.1029/2009JG001088, 2010a.
Yao, Z., Wu, X., Wolf, B., Dannenmann, M., Butterbach-Bahl, K., Brüggemann, N., Chen, W., and Zheng, X.: Soil-atmosphere exchange potential of NO and N2O in different land use types of Inner Mongolia as affected by soil temperature, soil moisture, freeze-thaw, and drying-wetting events, J. Geophys. Res., 115, D17116, https://doi.org/10.1029/2009JD013528, 2010b.
Yao, Z., Zheng, X., Wang, R., Dong, H., Xie, B., Mei, B., Zhou, Z., and Zhu, J.: Greenhouse gas fluxes and NO release from a Chinese subtropical rice-winter wheat rotation system under nitrogen fertilizer management, J. Geophys. Res.-Biogeo., 118, 623–638, 2013.
Yao, Z., Du, Y., Tao, Y., Zheng, X., Liu, C., Lin, S., and Butterbach-Bahl, K.: Water-saving ground cover rice production system reduces net greenhouse gas fluxes in an annual rice-based cropping system, Biogeosciences, 11, 6221–6236, https://doi.org/10.5194/bg-11-6221-2014, 2014.
Yao, Z., Liu, C., Dong, H., Wang, R., and Zheng, X.: Annual nitric and nitrous oxide fluxes from Chinese Subtropical plastic greenhouse and conventional vegetable cultivations, Environ. Pollut., 196, 89–97, 2015.
Zhao, M., Tian, Y., Zhang, M., Yao, Y., Ao, Y., Yin, B., and Zhu, Z.: Nonlinear response of nitric oxide emissions to a nitrogen application gradient: A case study during the wheat season in a Chinese rice-wheat rotation system, Atmos. Environ., 102, 200–208, 2015.
Zheng, X., Huang , Y., Wang, Y., and Wang, M.: Seasonal characteristics of nitric oxide emission from a typical Chinese rice-wheat rotation during the non-waterlogged period, Glob. Change Biol., 9, 219–227, 2003.
Zheng, X., Han, S., Huang, Y., Wang, Y., and Wang, M.: Re-quantifying the emission factors based on field measurements and estimating the direct N2O emission from Chinese croplands, Global Biogeochem. Cy., 18, GB2018, https://doi.org/10.1029/2003GB002167, 2004.
Zheng, X., Mei, B., Wang, Y.H., Xie, B., Wang, Y. S., Dong, H., Xu, H., Chen, G., Cai, Z., Yue, J., Gu, J., Su, F., Zou, J., and Zhu, J.: Quantification of N2O fluxes from soil-plant systems may be biased by the applied gas chromatograph methodology, Plant Soil, 311, 211–234, 2008.
Zhu, T., Zhang, J., and Cai, Z.: The contribution of nitrogen transformation processes to total N2O emission from soils used for intensive vegetable cultivation, Plant Soil, 343, 313–327, 2011.
Zhu, T., Zhang, J., Meng, T., Zhang, Y., Yang, J., Müller, C., and Cai, Z.: Tea plantation destroys soil retention of NO3- and increase N2O emissions in subtropical China, Soil Biol. Biochem., 73, 106–114, 2014.
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