Articles | Volume 17, issue 8
https://doi.org/10.5194/bg-17-2245-2020
© Author(s) 2020. 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-17-2245-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
22 Apr 2020
Research article |
| 22 Apr 2020
| 22 Apr 2020
Decadal variation in CO2 fluxes and its budget in a wheat and maize rotation cropland over the North China Plain
State Key Laboratory of Water Resources and Hydropower Engineering
Science, Wuhan University, Wuhan, China
State Key Laboratory of Hydroscience and Engineering, Department of
Hydraulic Engineering, Tsinghua University, Beijing, China
State Key Laboratory of Hydroscience and Engineering, Department of
Hydraulic Engineering, Tsinghua University, Beijing, China
Dawen Yang
State Key Laboratory of Hydroscience and Engineering, Department of
Hydraulic Engineering, Tsinghua University, Beijing, China
Lihua Xiong
State Key Laboratory of Water Resources and Hydropower Engineering
Science, Wuhan University, Wuhan, China
State Key Laboratory of Water Resources and Hydropower Engineering
Science, Wuhan University, Wuhan, China
Beijing Fang
State Key Laboratory of Hydroscience and Engineering, Department of
Hydraulic Engineering, Tsinghua University, Beijing, China
Department of Civil and Environmental Engineering, The Hong Kong
University of Science and Technology, Hong Kong SAR, China
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Quan Zhang, Hui-Min Lei, Da-Wen Yang, Lihua Xiong, and Beijing Fang
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With the increasing concern about global warming, investigating carbon cycle becomes imperative to predict future climate trend. As cropland has great potentials in mitigating carbon emissions, therefore we designed a comprehensive carbon budget assessment in a typical cropland in North China Plain, the results indicate the high groundwater table contributes to carbon sink of this cropland. The conclusion confirms that field management has profound effect on cropland carbon cycle.
Rutong Liu, Jiabo Yin, Louise Slater, Shengyu Kang, Yuanhang Yang, Pan Liu, Jiali Guo, Xihui Gu, Xiang Zhang, and Aliaksandr Volchak
Hydrol. Earth Syst. Sci., 28, 3305–3326, https://doi.org/10.5194/hess-28-3305-2024, https://doi.org/10.5194/hess-28-3305-2024, 2024
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Climate change accelerates the water cycle and alters the spatiotemporal distribution of hydrological variables, thus complicating the projection of future streamflow and hydrological droughts. We develop a cascade modeling chain to project future bivariate hydrological drought characteristics over China, using five bias-corrected global climate model outputs under three shared socioeconomic pathways, five hydrological models, and a deep-learning model.
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Flash flood warnings cannot be effective without people’s responses to them. We propose a method to determine the threshold of issuing the warnings based on the people’s response process simulation. The results show that adjusting the warning threshold according to the people’s tolerance levels of the failed warnings can improve warning effectiveness, but the prerequisite is to increase the forecasting accuracy and decrease the forecasting variance.
Jiabo Yin, Louise J. Slater, Abdou Khouakhi, Le Yu, Pan Liu, Fupeng Li, Yadu Pokhrel, and Pierre Gentine
Earth Syst. Sci. Data, 15, 5597–5615, https://doi.org/10.5194/essd-15-5597-2023, https://doi.org/10.5194/essd-15-5597-2023, 2023
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Atmos. Chem. Phys., 23, 13143–13166, https://doi.org/10.5194/acp-23-13143-2023, https://doi.org/10.5194/acp-23-13143-2023, 2023
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Multi-timescale variations in surface energy fluxes in a suburb of Beijing are analyzed using 16-month observations. Compared to previous suburban areas, this study site has larger seasonal variability in energy partitioning, and summer and winter Bowen ratios are at the lower and higher end of those at other suburban sites, respectively. Our analysis indicates that precipitation, irrigation, crop/vegetation growth activity, and land use/cover all play critical roles in energy partitioning.
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Hydrol. Earth Syst. Sci., 26, 6427–6441, https://doi.org/10.5194/hess-26-6427-2022, https://doi.org/10.5194/hess-26-6427-2022, 2022
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Hydrol. Earth Syst. Sci., 26, 6379–6397, https://doi.org/10.5194/hess-26-6379-2022, https://doi.org/10.5194/hess-26-6379-2022, 2022
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There are currently no available common datasets of the Soil moisture storage capacity (SMSC) on a global scale, especially for hydrological models. Here, we produce a dataset of the SMSC parameter for global hydrological models. The global SMSC is constructed based on the deep residual network at 0.5° resolution. SMSC products are validated on global grids and typical catchments from different climatic regions.
Yujie Zeng, Dedi Liu, Shenglian Guo, Lihua Xiong, Pan Liu, Jiabo Yin, and Zhenhui Wu
Hydrol. Earth Syst. Sci., 26, 3965–3988, https://doi.org/10.5194/hess-26-3965-2022, https://doi.org/10.5194/hess-26-3965-2022, 2022
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Changming Li, Hanbo Yang, Wencong Yang, Ziwei Liu, Yao Jia, Sien Li, and Dawen Yang
Earth Syst. Sci. Data Discuss., https://doi.org/10.5194/essd-2021-456, https://doi.org/10.5194/essd-2021-456, 2022
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A long-term (1980–2020) global ET product is generated based on a collocation-based merging method. The produced Collocation-Analyzed Multi-source Ensembled Land Evapotranspiration Data (CAMELE) performed well over different vegetation coverage against in-situ data. For global comparison, the spatial distribution of multi-year average and annual variation were in consistent with inputs.The CAMELE products is freely available at https://doi.org/10.5281/zenodo.6283239 (Li et al., 2021).
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Hydrol. Earth Syst. Sci., 25, 3411–3427, https://doi.org/10.5194/hess-25-3411-2021, https://doi.org/10.5194/hess-25-3411-2021, 2021
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Wencong Yang, Hanbo Yang, Dawen Yang, and Aizhong Hou
Hydrol. Earth Syst. Sci., 25, 2705–2720, https://doi.org/10.5194/hess-25-2705-2021, https://doi.org/10.5194/hess-25-2705-2021, 2021
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Hydrol. Earth Syst. Sci., 25, 711–733, https://doi.org/10.5194/hess-25-711-2021, https://doi.org/10.5194/hess-25-711-2021, 2021
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Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2021-5, https://doi.org/10.5194/hess-2021-5, 2021
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Zhengke Pan, Pan Liu, Chong-Yu Xu, Lei Cheng, Jing Tian, Shujie Cheng, and Kang Xie
Hydrol. Earth Syst. Sci., 24, 4369–4387, https://doi.org/10.5194/hess-24-4369-2020, https://doi.org/10.5194/hess-24-4369-2020, 2020
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Jingwen Zhang, Ximing Cai, Xiaohui Lei, Pan Liu, and Hao Wang
Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2020-304, https://doi.org/10.5194/hess-2020-304, 2020
Preprint withdrawn
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Real-time reservoir flood control operation is controlled manually by reservoir operators based on their experiences and justifications, rather than by computer automatically. We use a human-machine interactive modeling method to combine computer optimization model, human’s consideration, and reservoir stage observations for actual decisions on release for real-time reservoir flood control operation. The proposed method can reduce the flood risk and improve water use benefit simultaneously.
Yuting Yang, Shulei Zhang, Michael L. Roderick, Tim R. McVicar, Dawen Yang, Wenbin Liu, and Xiaoyan Li
Hydrol. Earth Syst. Sci., 24, 2921–2930, https://doi.org/10.5194/hess-24-2921-2020, https://doi.org/10.5194/hess-24-2921-2020, 2020
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Many previous studies using offline drought indices report that future warming will increase worldwide drought. However, this contradicts observations/projections of vegetation greening and increased runoff. We resolved this paradox by re-calculating the same drought indices using direct climate model outputs and find no increase in future drought as the climate warms. We also find that accounting for the impact of CO2 on plant transpiration avoids the previous overestimation of drought.
Bin Xiong, Lihua Xiong, Jun Xia, Chong-Yu Xu, Cong Jiang, and Tao Du
Hydrol. Earth Syst. Sci., 23, 4453–4470, https://doi.org/10.5194/hess-23-4453-2019, https://doi.org/10.5194/hess-23-4453-2019, 2019
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We develop a new indicator of reservoir effects, called the rainfall–reservoir composite index (RRCI). RRCI, coupled with the effects of static reservoir capacity and scheduling-related multivariate rainfall, has a better performance than the previous indicator in terms of explaining the variation in the downstream floods affected by reservoir operation. A covariate-based flood frequency analysis using RRCI can provide more reliable downstream flood risk estimation.
Zhengke Pan, Pan Liu, Shida Gao, Jun Xia, Jie Chen, and Lei Cheng
Hydrol. Earth Syst. Sci., 23, 3405–3421, https://doi.org/10.5194/hess-23-3405-2019, https://doi.org/10.5194/hess-23-3405-2019, 2019
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Understanding the projection performance of hydrological models under contrasting climatic conditions supports robust decision making, which highlights the need to adopt time-varying parameters in hydrological modeling to reduce performance degradation. This study improves our understanding of the spatial coherence of time-varying parameters, which will help improve the projection performance under differing climatic conditions.
Jong-Suk Kim, Phetlamphanh Xaiyaseng, Lihua Xiong, Sun-Kwon Yoon, and Taesam Lee
Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2019-217, https://doi.org/10.5194/hess-2019-217, 2019
Publication in HESS not foreseen
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The current study illustrates rainfall patterns over the Indochina Peninsula (ICP) to sea surface temperature in the Indian Ocean. During El Niño years and a positive IOD, rainfall is less than usual in Thailand, Cambodia, southern Laos, and Vietnam. Conversely, during La Niña years and the negative IOD, rainfall throughout the ICP is above normal. It shows that (1) the sensitivity of regional precipitation to the IOD and (2) the potential future impact of statistical changes.
Cong Jiang, Lihua Xiong, Lei Yan, Jianfan Dong, and Chong-Yu Xu
Hydrol. Earth Syst. Sci., 23, 1683–1704, https://doi.org/10.5194/hess-23-1683-2019, https://doi.org/10.5194/hess-23-1683-2019, 2019
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We present the methods addressing the multivariate hydrologic design applied to the engineering practice under nonstationary conditions. A dynamic C-vine copula allowing for both time-varying marginal distributions and a time-varying dependence structure is developed to capture the nonstationarities of multivariate flood distribution. Then, the multivariate hydrologic design under nonstationary conditions is estimated through specifying the design criterion by average annual reliability.
Bin Xiong, Lihua Xiong, Jie Chen, Chong-Yu Xu, and Lingqi Li
Hydrol. Earth Syst. Sci., 22, 1525–1542, https://doi.org/10.5194/hess-22-1525-2018, https://doi.org/10.5194/hess-22-1525-2018, 2018
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In changing environments, extreme low-flow events are expected to increase. Frequency analysis of low-flow events considering the impacts of changing environments has attracted increasing attention. This study developed a frequency analysis framework by applying 11 indices to trace the main causes of the change in the annual extreme low-flow events of the Weihe River. We showed that the fluctuation in annual low-flow series was affected by climate, streamflow recession and irrigation area.
Bing Gao, Dawen Yang, Yue Qin, Yuhan Wang, Hongyi Li, Yanlin Zhang, and Tingjun Zhang
The Cryosphere, 12, 657–673, https://doi.org/10.5194/tc-12-657-2018, https://doi.org/10.5194/tc-12-657-2018, 2018
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This study developed a distributed hydrological model coupled with cryospherical processes and applied it in order to simulate the long-term change of frozen ground and its effect on hydrology in the upper Heihe basin. Results showed that the permafrost area shrank by 8.8%, and the frozen depth of seasonally frozen ground decreased. Runoff in cold seasons and annual liquid soil moisture increased due to frozen soils change. Groundwater recharge was enhanced due to the degradation of permafrost.
Zhongwang Chen, Huimin Lei, Hanbo Yang, Dawen Yang, and Yongqiang Cao
Hydrol. Earth Syst. Sci., 21, 2233–2248, https://doi.org/10.5194/hess-21-2233-2017, https://doi.org/10.5194/hess-21-2233-2017, 2017
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The significant climate changes remind us to characterize the hydrological response to it. Based on the long-term observed hydrological and meteorological data in 291 catchments across China, we find a pattern of the response stating that
drier regions are more likely to become drier, whereas wetter regions are more likely to become wetter. We also reveal that the precipitation changes play the most significant role in this process.
Tingting Gong, Huimin Lei, Dawen Yang, Yang Jiao, and Hanbo Yang
Hydrol. Earth Syst. Sci., 21, 863–877, https://doi.org/10.5194/hess-21-863-2017, https://doi.org/10.5194/hess-21-863-2017, 2017
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Seasonal and inter-annual features of ET were analyzed over four periods. A normalization method was adopted to exclude the effects of potential evapotranspiration and soil water stress on ET. During the land degradation process, when natural vegetation (including leaves and branches), sand dunes, dry sand layers, and BSCs were all bulldozed, ET was observed to increase at a mild rate. In a vegetation rehabilitation process with sufficient groundwater, ET also increased at a faster rate.
Bing Gao, Dawen Yang, Yue Qin, Yuhan Wang, Hongyi Li, Yanlin Zhang, and Tingjun Zhang
The Cryosphere Discuss., https://doi.org/10.5194/tc-2016-289, https://doi.org/10.5194/tc-2016-289, 2017
Revised manuscript not accepted
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This study developed a distributed hydrological model coupled with cryospherical processes and used it to simulate the long-term change of frozen ground and hydrological impacts in the upper Heihe basin. Results showed that the permafrost area shrank by 9.5 %, and frozen depth of seasonally frozen ground decreased at a rate of 4.1 cm/10 yr. Runoff increased in cold season due to the increase in liquid soil moisture. Groundwater recharge was enhanced due to the degradation of permafrost.
Chao Deng, Pan Liu, Shenglian Guo, Zejun Li, and Dingbao Wang
Hydrol. Earth Syst. Sci., 20, 4949–4961, https://doi.org/10.5194/hess-20-4949-2016, https://doi.org/10.5194/hess-20-4949-2016, 2016
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Hydrological model parameters may vary in time under nonstationary conditions, i.e., climate change and anthropogenic activities. The technique of the ensemble Kalman filter (EnKF) is proposed to identify the temporal variation of parameters for a two-parameter monthly water balance model. Through a synthesis experiment and two case studies, the EnKF is demonstrated to be useful for the identification of parameter variations.
Lingqi Li, Lihua Xiong, Chong-Yu Xu, Shenglian Guo, and Pan Liu
Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2016-619, https://doi.org/10.5194/hess-2016-619, 2016
Revised manuscript not accepted
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The study offers insights into future design floods that are inferred with both AM and POT samplings under nonstationarity caused by changing climate. Future design floods in nonstationarity context are usually (lower than) but not necessarily more different from stationary estimates. AM-based projection is more sensitive to climate change than POT estimates. The over-dispersion in POT arrival rate leads to the invalidation of Poisson assumption that the misuse may induce overestimated floods.
Quan Zhang, Hui-Min Lei, Da-Wen Yang, Lihua Xiong, and Beijing Fang
Biogeosciences Discuss., https://doi.org/10.5194/bg-2016-484, https://doi.org/10.5194/bg-2016-484, 2016
Revised manuscript not accepted
Short summary
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With the increasing concern about global warming, investigating carbon cycle becomes imperative to predict future climate trend. As cropland has great potentials in mitigating carbon emissions, therefore we designed a comprehensive carbon budget assessment in a typical cropland in North China Plain, the results indicate the high groundwater table contributes to carbon sink of this cropland. The conclusion confirms that field management has profound effect on cropland carbon cycle.
Zhongwei Huang, Hanbo Yang, and Dawen Yang
Hydrol. Earth Syst. Sci., 20, 2573–2587, https://doi.org/10.5194/hess-20-2573-2016, https://doi.org/10.5194/hess-20-2573-2016, 2016
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The hydrologic processes have been influenced by different climatic factors. However, the dominant climatic factor driving annual runoff change is still unknown in many catchments in China. By using the climate elasticity method proposed by Yang and Yang (2011), the elasticity of runoff to climatic factors was estimated, and the dominant climatic factors driving annual runoff change were detected at catchment scale over China.
Chao Deng, Pan Liu, Shenglian Guo, Zejun Li, and Dingbao Wang
Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2015-407, https://doi.org/10.5194/hess-2015-407, 2016
Manuscript not accepted for further review
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Hydrological model parameters may not be constant in a changing environment, i.e., climate change and human activities. The technique of ensemble Kalman filter (EnKF) is proposed to identify the temporal variation of parameters for a two-parameter monthly water balance model. Through a synthesis experiment and two case studies, the EnKF is demonstrated to be useful for the identification of parameter variation. The temporal variation parameter can be explained by catchment characteristic.
D. Zhang, Z. Cong, G. Ni, D. Yang, and S. Hu
Hydrol. Earth Syst. Sci., 19, 1977–1992, https://doi.org/10.5194/hess-19-1977-2015, https://doi.org/10.5194/hess-19-1977-2015, 2015
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1. Catchments with higher snow ratio tend to have larger runoff index.
2. A modified Budyko method is proposed to illustrate the snow effect on runoff.
3. Snow ratio change has a significant contribution to runoff change, according to historical observations and projected future climate scenarios, especially in northwestern mountainous and northern high-latitude areas of China.
T. T. Gong, H. M. Lei, D. W. Yang, Y. Jiao, and H. B. Yang
Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hessd-11-13571-2014, https://doi.org/10.5194/hessd-11-13571-2014, 2014
Revised manuscript not accepted
D. N. Huntzinger, C. Schwalm, A. M. Michalak, K. Schaefer, A. W. King, Y. Wei, A. Jacobson, S. Liu, R. B. Cook, W. M. Post, G. Berthier, D. Hayes, M. Huang, A. Ito, H. Lei, C. Lu, J. Mao, C. H. Peng, S. Peng, B. Poulter, D. Riccuito, X. Shi, H. Tian, W. Wang, N. Zeng, F. Zhao, and Q. Zhu
Geosci. Model Dev., 6, 2121–2133, https://doi.org/10.5194/gmd-6-2121-2013, https://doi.org/10.5194/gmd-6-2121-2013, 2013
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The exchange of CO2 between the sea and the atmosphere was studied in the Archipelago Sea, Baltic Sea, in 2017–2021, using an eddy covariance technique. The sea acted as a net source of CO2 with an average yearly emission of 27.1 gC m-2 yr-1, indicating that the marine ecosystem respired carbon that originated elsewhere. The yearly CO2 emission varied between 18.2–39.2 gC m-2 yr-1, mostly due to the yearly variation of ecosystem carbon uptake.
Ralf C. H. Aben, Daniël van de Craats, Jim Boonman, Stijn H. Peeters, Bart Vriend, Coline C. F. Boonman, Ype van der Velde, Gilles Erkens, and Merit van den Berg
Biogeosciences, 21, 4099–4118, https://doi.org/10.5194/bg-21-4099-2024, https://doi.org/10.5194/bg-21-4099-2024, 2024
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Drained peatlands cause high CO2 emissions. We assessed the effectiveness of subsurface water infiltration systems (WISs) in reducing CO2 emissions related to increases in water table depth (WTD) on 12 sites for up to 4 years. Results show WISs markedly reduced emissions by 2.1 t CO2-C ha-1 yr-1. The relationship between the amount of carbon above the WTD and CO2 emission was stronger than the relationship between WTD and emission. Long-term monitoring is crucial for accurate emission estimates.
Ingeborg Bussmann, Eric P. Achterberg, Holger Brix, Nicolas Brüggemann, Götz Flöser, Claudia Schütze, and Philipp Fischer
Biogeosciences, 21, 3819–3838, https://doi.org/10.5194/bg-21-3819-2024, https://doi.org/10.5194/bg-21-3819-2024, 2024
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Methane (CH4) is an important greenhouse gas and contributes to climate warming. However, the input of CH4 from coastal areas to the atmosphere is not well defined. Dissolved and atmospheric CH4 was determined at high spatial resolution in or above the North Sea. The atmospheric CH4 concentration was mainly influenced by wind direction. With our detailed study on the spatial distribution of CH4 fluxes we were able to provide a detailed and more realistic estimation of coastal CH4 fluxes.
Niu Zhu, Jinniu Wang, Dongliang Luo, Xufeng Wang, Cheng Shen, and Ning Wu
Biogeosciences, 21, 3509–3522, https://doi.org/10.5194/bg-21-3509-2024, https://doi.org/10.5194/bg-21-3509-2024, 2024
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Our study delves into the vital role of subalpine forests in the Qinghai–Tibet Plateau as carbon sinks in the context of climate change. Utilizing advanced eddy covariance systems, we uncover their significant carbon sequestration potential, observing distinct seasonal patterns influenced by temperature, humidity, and radiation. Notably, these forests exhibit robust carbon absorption, with potential implications for global carbon balance.
Colette L. Kelly, Nicole M. Travis, Pascale Anabelle Baya, Claudia Frey, Xin Sun, Bess B. Ward, and Karen L. Casciotti
Biogeosciences, 21, 3215–3238, https://doi.org/10.5194/bg-21-3215-2024, https://doi.org/10.5194/bg-21-3215-2024, 2024
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Nitrous oxide, a potent greenhouse gas, accumulates in regions of the ocean that are low in dissolved oxygen. We used a novel combination of chemical tracers to determine how nitrous oxide is produced in one of these regions, the eastern tropical North Pacific Ocean. Our experiments showed that the two most important sources of nitrous oxide under low-oxygen conditions are denitrification, an anaerobic process, and a novel “hybrid” process performed by ammonia-oxidizing archaea.
Hella van Asperen, Thorsten Warneke, Alessandro Carioca de Araújo, Bruce Forsberg, Sávio José Filgueiras Ferreira, Thomas Röckmann, Carina van der Veen, Sipko Bulthuis, Leonardo Ramos de Oliveira, Thiago de Lima Xavier, Jailson da Mata, Marta de Oliveira Sá, Paulo Ricardo Teixeira, Julie Andrews de França e Silva, Susan Trumbore, and Justus Notholt
Biogeosciences, 21, 3183–3199, https://doi.org/10.5194/bg-21-3183-2024, https://doi.org/10.5194/bg-21-3183-2024, 2024
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Carbon monoxide (CO) is regarded as an important indirect greenhouse gas. Soils can emit and take up CO, but, until now, uncertainty remains as to which process dominates in tropical rainforests. We present the first soil CO flux measurements from a tropical rainforest. Based on our observations, we report that tropical rainforest soils are a net source of CO. In addition, we show that valley streams and inundated areas are likely additional hot spots of CO in the ecosystem.
Ihab Alfadhel, Ignacio Peralta-Maraver, Isabel Reche, Enrique P. Sánchez-Cañete, Sergio Aranda-Barranco, Eva Rodríguez-Velasco, Andrew S. Kowalski, and Penélope Serrano-Ortiz
EGUsphere, https://doi.org/10.5194/egusphere-2024-1562, https://doi.org/10.5194/egusphere-2024-1562, 2024
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Inland saline lakes are crucial in the global carbon cycle, but increased droughts may alter their carbon exchange capacity. We measured CO2 and CH4 fluxes in a Mediterranean saline lake using the Eddy Covariance method under dry and wet conditions. We found the lake acts as a carbon sink during wet periods but not during droughts. These results highlight the importance of saline lakes in carbon sequestration and their vulnerability to climate change-induced droughts.
Yélognissè Agbohessou, Claire Delon, Manuela Grippa, Eric Mougin, Daouda Ngom, Espoir Koudjo Gaglo, Ousmane Ndiaye, Paulo Salgado, and Olivier Roupsard
Biogeosciences, 21, 2811–2837, https://doi.org/10.5194/bg-21-2811-2024, https://doi.org/10.5194/bg-21-2811-2024, 2024
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Emissions of greenhouse gases in the Sahel are not well represented because they are considered weak compared to the rest of the world. However, natural areas in the Sahel emit carbon dioxide and nitrous oxides, which need to be assessed because of extended surfaces. We propose an assessment of such emissions in Sahelian silvopastoral systems and of how they are influenced by environmental characteristics. These results are essential to inform climate change strategies in the region.
Merit van den Berg, Thomas M. Gremmen, Renske J. E. Vroom, Jacobus van Huissteden, Jim Boonman, Corine J. A. van Huissteden, Ype van der Velde, Alfons J. P. Smolders, and Bas P. van de Riet
Biogeosciences, 21, 2669–2690, https://doi.org/10.5194/bg-21-2669-2024, https://doi.org/10.5194/bg-21-2669-2024, 2024
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Drained peatlands emit 3 % of the global greenhouse gas emissions. Paludiculture is a way to reduce CO2 emissions while at the same time generating an income for landowners. The side effect is the potentially high methane emissions. We found very high methane emissions for broadleaf cattail compared with narrowleaf cattail and water fern. The rewetting was, however, effective to stop CO2 emissions for all species. The highest potential to reduce greenhouse gas emissions had narrowleaf cattail.
Thea H. Heimdal, Galen A. McKinley, Adrienne J. Sutton, Amanda R. Fay, and Lucas Gloege
Biogeosciences, 21, 2159–2176, https://doi.org/10.5194/bg-21-2159-2024, https://doi.org/10.5194/bg-21-2159-2024, 2024
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Measurements of ocean carbon are limited in time and space. Machine learning algorithms are therefore used to reconstruct ocean carbon where observations do not exist. Improving these reconstructions is important in order to accurately estimate how much carbon the ocean absorbs from the atmosphere. In this study, we find that a small addition of observations from the Southern Ocean, obtained by autonomous sampling platforms, could significantly improve the reconstructions.
Guilherme L. Torres Mendonça, Julia Pongratz, and Christian H. Reick
Biogeosciences, 21, 1923–1960, https://doi.org/10.5194/bg-21-1923-2024, https://doi.org/10.5194/bg-21-1923-2024, 2024
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We study the timescale dependence of airborne fraction and underlying feedbacks by a theory of the climate–carbon system. Using simulations we show the predictive power of this theory and find that (1) this fraction generally decreases for increasing timescales and (2) at all timescales the total feedback is negative and the model spread in a single feedback causes the spread in the airborne fraction. Our study indicates that those are properties of the system, independently of the scenario.
François Clayer, Jan Erik Thrane, Kuria Ndungu, Andrew King, Peter Dörsch, and Thomas Rohrlack
Biogeosciences, 21, 1903–1921, https://doi.org/10.5194/bg-21-1903-2024, https://doi.org/10.5194/bg-21-1903-2024, 2024
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Determination of dissolved greenhouse gas (GHG) in freshwater allows us to estimate GHG fluxes. Mercuric chloride (HgCl2) is used to preserve water samples prior to GHG analysis despite its environmental and health impacts and interferences with water chemistry in freshwater. Here, we tested the effects of HgCl2, two substitutes and storage time on GHG in water from two boreal lakes. Preservation with HgCl2 caused overestimation of CO2 concentration with consequences for GHG flux estimation.
Helena Rautakoski, Mika Korkiakoski, Jarmo Mäkelä, Markku Koskinen, Kari Minkkinen, Mika Aurela, Paavo Ojanen, and Annalea Lohila
Biogeosciences, 21, 1867–1886, https://doi.org/10.5194/bg-21-1867-2024, https://doi.org/10.5194/bg-21-1867-2024, 2024
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Current and future nitrous oxide (N2O) emissions are difficult to estimate due to their high variability in space and time. Several years of N2O fluxes from drained boreal peatland forest indicate high importance of summer precipitation, winter temperature, and snow conditions in controlling annual N2O emissions. The results indicate increasing year-to-year variation in N2O emissions in changing climate with more extreme seasonal weather conditions.
Matthias Koschorreck, Norbert Kamjunke, Uta Koedel, Michael Rode, Claudia Schuetze, and Ingeborg Bussmann
Biogeosciences, 21, 1613–1628, https://doi.org/10.5194/bg-21-1613-2024, https://doi.org/10.5194/bg-21-1613-2024, 2024
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We measured the emission of carbon dioxide (CO2) and methane (CH4) from different sites at the river Elbe in Germany over 3 days to find out what is more important for quantification: small-scale spatial variability or diurnal temporal variability. We found that CO2 emissions were very different between day and night, while CH4 emissions were more different between sites. Dried out river sediments contributed to CO2 emissions, while the side areas of the river were important CH4 sources.
Odysseas Sifounakis, Edwin Haas, Klaus Butterbach-Bahl, and Maria P. Papadopoulou
Biogeosciences, 21, 1563–1581, https://doi.org/10.5194/bg-21-1563-2024, https://doi.org/10.5194/bg-21-1563-2024, 2024
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We performed a full assessment of the carbon and nitrogen cycles of a cropland ecosystem. An uncertainty analysis and quantification of all carbon and nitrogen fluxes were deployed. The inventory simulations include greenhouse gas emissions of N2O, NH3 volatilization and NO3 leaching from arable land cultivation in Greece. The inventory also reports changes in soil organic carbon and nitrogen stocks in arable soils.
Nathaniel B. Weston, Cynthia Troy, Patrick J. Kearns, Jennifer L. Bowen, William Porubsky, Christelle Hyacinthe, Christof Meile, Philippe Van Cappellen, and Samantha B. Joye
EGUsphere, https://doi.org/10.5194/egusphere-2024-448, https://doi.org/10.5194/egusphere-2024-448, 2024
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Nitrous oxide (N2O) is a potent greenhouse and ozone depleting gas produced largely from microbial nitrogen cycling processes, and human activities have resulted in increases in atmospheric N2O. We investigate the role of physical and chemical disturbance to soils and sediments. We demonstrate that the disturbance increases N2O production, the microbial community adapts to disturbance over time, an initial disturbance appears to confer resilience to subsequent disturbance.
Sarah M. Ludwig, Luke Schiferl, Jacqueline Hung, Susan M. Natali, and Roisin Commane
Biogeosciences, 21, 1301–1321, https://doi.org/10.5194/bg-21-1301-2024, https://doi.org/10.5194/bg-21-1301-2024, 2024
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Landscapes are often assumed to be homogeneous when using eddy covariance fluxes, which can lead to biases when calculating carbon budgets. In this study we report eddy covariance carbon fluxes from heterogeneous tundra. We used the footprints of each flux observation to unmix the fluxes coming from components of the landscape. We identified and quantified hot spots of carbon emissions in the landscape. Accurately scaling with landscape heterogeneity yielded half as much regional carbon uptake.
Silvie Lainela, Erik Jacobs, Stella-Theresa Stoicescu, Gregor Rehder, and Urmas Lips
EGUsphere, https://doi.org/10.5194/egusphere-2024-598, https://doi.org/10.5194/egusphere-2024-598, 2024
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We evaluate the variability of carbon dioxide and methane in the surface layer of the north-eastern basins of the Baltic Sea in 2018. We show that the shallower coastal areas have considerably higher spatial variability and seasonal amplitude of surface layer pCO2 and cCH4 than measured in the Baltic Sea offshore areas. Despite this high variability, caused mostly by coastal physical processes, the average annual air-sea CO2 fluxes differed only marginally between the sub-basins.
Sigrid Trier Kjær, Sebastian Westermann, Nora Nedkvitne, and Peter Dörsch
EGUsphere, https://doi.org/10.5194/egusphere-2024-562, https://doi.org/10.5194/egusphere-2024-562, 2024
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Permafrost peatlands are thawing due to climate change, releasing large quantities of carbon that degrades upon thawing and is released as CO2, CH4, or dissolved organic carbon (DOC). We incubated thawed Norwegian permafrost peat plateaus and thermokarst pond sediment found next to permafrost for up to 350 days to measure carbon loss. CO2 production was largest initially, while CH4 production increased over time. The largest carbon loss was measured at the top of the peat plateau core as DOC.
Zhao-Jun Yong, Wei‐Jen Lin, Chiao-Wen Lin, and Hsing-Juh Lin Lin
EGUsphere, https://doi.org/10.5194/egusphere-2024-533, https://doi.org/10.5194/egusphere-2024-533, 2024
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This study is the first to simultaneously measure mangrove CH4 emissions from both stems and soils throughout tidal cycles. The stems served as both net CO2 and CH4 sources. Compared to those of the soils, the stems exhibited markedly lower CH4 emissions, but no difference in CO2 emissions. Sampling only during low tides might overestimate the stem CO2 and CH4 emissions on a diurnal scale. This study also highlights species distinctness (with pneumatophores) in the emissions.
Justine Trémeau, Beñat Olascoaga, Leif Backman, Esko Karvinen, Henriikka Vekuri, and Liisa Kulmala
Biogeosciences, 21, 949–972, https://doi.org/10.5194/bg-21-949-2024, https://doi.org/10.5194/bg-21-949-2024, 2024
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We studied urban lawns and meadows in the Helsinki metropolitan area, Finland. We found that meadows are more resistant to drought events but that they do not increase carbon sequestration compared with lawns. Moreover, the transformation from lawns to meadows did not demonstrate any negative climate effects in terms of greenhouse gas emissions. Even though social and economic aspects also steer urban development, these results can guide planning to consider carbon-smart options.
Guantao Chen, Edzo Veldkamp, Muhammad Damris, Bambang Irawan, Aiyen Tjoa, and Marife D. Corre
Biogeosciences, 21, 513–529, https://doi.org/10.5194/bg-21-513-2024, https://doi.org/10.5194/bg-21-513-2024, 2024
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We established an oil palm management experiment in a large-scale oil palm plantation in Jambi, Indonesia. We recorded oil palm fruit yield and measured soil CO2, N2O, and CH4 fluxes. After 4 years of treatment, compared with conventional fertilization with herbicide weeding, reduced fertilization with mechanical weeding did not reduce yield and soil greenhouse gas emissions, which highlights the legacy effects of over a decade of conventional management prior to the start of the experiment.
Elizabeth Gachibu Wangari, Ricky Mwangada Mwanake, Tobias Houska, David Kraus, Gretchen Maria Gettel, Ralf Kiese, Lutz Breuer, and Klaus Butterbach-Bahl
Biogeosciences, 20, 5029–5067, https://doi.org/10.5194/bg-20-5029-2023, https://doi.org/10.5194/bg-20-5029-2023, 2023
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Agricultural landscapes act as sinks or sources of the greenhouse gases (GHGs) CO2, CH4, or N2O. Various physicochemical and biological processes control the fluxes of these GHGs between ecosystems and the atmosphere. Therefore, fluxes depend on environmental conditions such as soil moisture, soil temperature, or soil parameters, which result in large spatial and temporal variations of GHG fluxes. Here, we describe an example of how this variation may be studied and analyzed.
Laurie C. Menviel, Paul Spence, Andrew E. Kiss, Matthew A. Chamberlain, Hakase Hayashida, Matthew H. England, and Darryn Waugh
Biogeosciences, 20, 4413–4431, https://doi.org/10.5194/bg-20-4413-2023, https://doi.org/10.5194/bg-20-4413-2023, 2023
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As the ocean absorbs 25% of the anthropogenic emissions of carbon, it is important to understand the impact of climate change on the flux of carbon between the ocean and the atmosphere. Here, we use a very high-resolution ocean, sea-ice, carbon cycle model to show that the capability of the Southern Ocean to uptake CO2 has decreased over the last 40 years due to a strengthening and poleward shift of the southern hemispheric westerlies. This trend is expected to continue over the coming century.
Petr Znachor, Jiří Nedoma, Vojtech Kolar, and Anna Matoušů
Biogeosciences, 20, 4273–4288, https://doi.org/10.5194/bg-20-4273-2023, https://doi.org/10.5194/bg-20-4273-2023, 2023
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We conducted intensive spatial sampling of the hypertrophic fishpond to better understand the spatial dynamics of methane fluxes and environmental heterogeneity in fishponds. The diffusive fluxes of methane accounted for only a minor fraction of the total fluxes and both varied pronouncedly within the pond and over the studied summer season. This could be explained only by the water depth. Wind substantially affected temperature, oxygen and chlorophyll a distribution in the pond.
Sofie Sjögersten, Martha Ledger, Matthias Siewert, Betsabé de la Barreda-Bautista, Andrew Sowter, David Gee, Giles Foody, and Doreen S. Boyd
Biogeosciences, 20, 4221–4239, https://doi.org/10.5194/bg-20-4221-2023, https://doi.org/10.5194/bg-20-4221-2023, 2023
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Permafrost thaw in Arctic regions is increasing methane emissions, but quantification is difficult given the large and remote areas impacted. We show that UAV data together with satellite data can be used to extrapolate emissions across the wider landscape as well as detect areas at risk of higher emissions. A transition of currently degrading areas to fen type vegetation can increase emission by several orders of magnitude, highlighting the importance of quantifying areas at risk.
Cole G. Brachmann, Tage Vowles, Riikka Rinnan, Mats P. Björkman, Anna Ekberg, and Robert G. Björk
Biogeosciences, 20, 4069–4086, https://doi.org/10.5194/bg-20-4069-2023, https://doi.org/10.5194/bg-20-4069-2023, 2023
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Herbivores change plant communities through grazing, altering the amount of CO2 and plant-specific chemicals (termed VOCs) emitted. We tested this effect by excluding herbivores and studying the CO2 and VOC emissions. Herbivores reduced CO2 emissions from a meadow community and altered VOC composition; however, community type had the strongest effect on the amount of CO2 and VOCs released. Herbivores can mediate greenhouse gas emissions, but the effect is marginal and community dependent.
Ole Lessmann, Jorge Encinas Fernández, Karla Martínez-Cruz, and Frank Peeters
Biogeosciences, 20, 4057–4068, https://doi.org/10.5194/bg-20-4057-2023, https://doi.org/10.5194/bg-20-4057-2023, 2023
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Based on a large dataset of seasonally resolved methane (CH4) pore water concentrations in a reservoir's sediment, we assess the significance of CH4 emissions due to reservoir flushing. In the studied reservoir, CH4 emissions caused by one flushing operation can represent 7 %–14 % of the annual CH4 emissions and depend on the timing of the flushing operation. In reservoirs with high sediment loadings, regular flushing may substantially contribute to the overall CH4 emissions.
Matti Räsänen, Risto Vesala, Petri Rönnholm, Laura Arppe, Petra Manninen, Markus Jylhä, Jouko Rikkinen, Petri Pellikka, and Janne Rinne
Biogeosciences, 20, 4029–4042, https://doi.org/10.5194/bg-20-4029-2023, https://doi.org/10.5194/bg-20-4029-2023, 2023
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Fungus-growing termites recycle large parts of dead plant material in African savannas and are significant sources of greenhouse gases. We measured CO2 and CH4 fluxes from their mounds and surrounding soils in open and closed habitats. The fluxes scale with mound volume. The results show that emissions from mounds of fungus-growing termites are more stable than those from other termites. The soil fluxes around the mound are affected by the termite colonies at up to 2 m distance from the mound.
Tim René de Groot, Anne Margriet Mol, Katherine Mesdag, Pierre Ramond, Rachel Ndhlovu, Julia Catherine Engelmann, Thomas Röckmann, and Helge Niemann
Biogeosciences, 20, 3857–3872, https://doi.org/10.5194/bg-20-3857-2023, https://doi.org/10.5194/bg-20-3857-2023, 2023
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This study investigates methane dynamics in the Wadden Sea. Our measurements revealed distinct variations triggered by seasonality and tidal forcing. The methane budget was higher in warmer seasons but surprisingly high in colder seasons. Methane dynamics were amplified during low tides, flushing the majority of methane into the North Sea or releasing it to the atmosphere. Methanotrophic activity was also elevated during low tide but mitigated only a small fraction of the methane efflux.
Frederic Thalasso, Brenda Riquelme, Andrés Gómez, Roy Mackenzie, Francisco Javier Aguirre, Jorge Hoyos-Santillan, Ricardo Rozzi, and Armando Sepulveda-Jauregui
Biogeosciences, 20, 3737–3749, https://doi.org/10.5194/bg-20-3737-2023, https://doi.org/10.5194/bg-20-3737-2023, 2023
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A robust skirt-chamber design to capture and quantify greenhouse gas emissions from peatlands is presented. Compared to standard methods, this design improves the spatial resolution of field studies in remote locations while minimizing intrusion.
Gesa Schulz, Tina Sanders, Yoana G. Voynova, Hermann W. Bange, and Kirstin Dähnke
Biogeosciences, 20, 3229–3247, https://doi.org/10.5194/bg-20-3229-2023, https://doi.org/10.5194/bg-20-3229-2023, 2023
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Nitrous oxide (N2O) is an important greenhouse gas. However, N2O emissions from estuaries underlie significant uncertainties due to limited data availability and high spatiotemporal variability. We found the Elbe Estuary (Germany) to be a year-round source of N2O, with the highest emissions in winter along with high nitrogen loads. However, in spring and summer, N2O emissions did not decrease alongside lower nitrogen loads because organic matter fueled in situ N2O production along the estuary.
Alex Mavrovic, Oliver Sonnentag, Juha Lemmetyinen, Jennifer L. Baltzer, Christophe Kinnard, and Alexandre Roy
Biogeosciences, 20, 2941–2970, https://doi.org/10.5194/bg-20-2941-2023, https://doi.org/10.5194/bg-20-2941-2023, 2023
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This review supports the integration of microwave spaceborne information into carbon cycle science for Arctic–boreal regions. The microwave data record spans multiple decades with frequent global observations of soil moisture and temperature, surface freeze–thaw cycles, vegetation water storage, snowpack properties, and land cover. This record holds substantial unexploited potential to better understand carbon cycle processes.
Zoé Rehder, Thomas Kleinen, Lars Kutzbach, Victor Stepanenko, Moritz Langer, and Victor Brovkin
Biogeosciences, 20, 2837–2855, https://doi.org/10.5194/bg-20-2837-2023, https://doi.org/10.5194/bg-20-2837-2023, 2023
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We use a new model to investigate how methane emissions from Arctic ponds change with warming. We find that emissions increase substantially. Under annual temperatures 5 °C above present temperatures, pond methane emissions are more than 3 times higher than now. Most of this increase is caused by an increase in plant productivity as plants provide the substrate microbes used to produce methane. We conclude that vegetation changes need to be included in predictions of pond methane emissions.
Julian Koch, Lars Elsgaard, Mogens H. Greve, Steen Gyldenkærne, Cecilie Hermansen, Gregor Levin, Shubiao Wu, and Simon Stisen
Biogeosciences, 20, 2387–2403, https://doi.org/10.5194/bg-20-2387-2023, https://doi.org/10.5194/bg-20-2387-2023, 2023
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Utilizing peatlands for agriculture leads to large emissions of greenhouse gases worldwide. The emissions are triggered by lowering the water table, which is a necessary step in order to make peatlands arable. Many countries aim at reducing their emissions by restoring peatlands, which can be achieved by stopping agricultural activities and thereby raising the water table. We estimate a total emission of 2.6 Mt CO2-eq for organic-rich peatlands in Denmark and a potential reduction of 77 %.
Mélissa Laurent, Matthias Fuchs, Tanja Herbst, Alexandra Runge, Susanne Liebner, and Claire C. Treat
Biogeosciences, 20, 2049–2064, https://doi.org/10.5194/bg-20-2049-2023, https://doi.org/10.5194/bg-20-2049-2023, 2023
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In this study we investigated the effect of different parameters (temperature, landscape position) on the production of greenhouse gases during a 1-year permafrost thaw experiment. For very similar carbon and nitrogen contents, our results show a strong heterogeneity in CH4 production, as well as in microbial abundance. According to our study, these differences are mainly due to the landscape position and the hydrological conditions established as a result of the topography.
Michael Moubarak, Seeta Sistla, Stefano Potter, Susan M. Natali, and Brendan M. Rogers
Biogeosciences, 20, 1537–1557, https://doi.org/10.5194/bg-20-1537-2023, https://doi.org/10.5194/bg-20-1537-2023, 2023
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Tundra wildfires are increasing in frequency and severity with climate change. We show using a combination of field measurements and computational modeling that tundra wildfires result in a positive feedback to climate change by emitting significant amounts of long-lived greenhouse gasses. With these effects, attention to tundra fires is necessary for mitigating climate change.
Hanna I. Campen, Damian L. Arévalo-Martínez, and Hermann W. Bange
Biogeosciences, 20, 1371–1379, https://doi.org/10.5194/bg-20-1371-2023, https://doi.org/10.5194/bg-20-1371-2023, 2023
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Carbon monoxide (CO) is a climate-relevant trace gas emitted from the ocean. However, oceanic CO cycling is understudied. Results from incubation experiments conducted in the Fram Strait (Arctic Ocean) indicated that (i) pH did not affect CO cycling and (ii) enhanced CO production and consumption were positively correlated with coloured dissolved organic matter and nitrate concentrations. This suggests microbial CO uptake to be the driving factor for CO cycling in the Arctic Ocean.
Yihong Zhu, Ruihua Liu, Huai Zhang, Shaoda Liu, Zhengfeng Zhang, Fei-Hai Yu, and Timothy G. Gregoire
Biogeosciences, 20, 1357–1370, https://doi.org/10.5194/bg-20-1357-2023, https://doi.org/10.5194/bg-20-1357-2023, 2023
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With global warming, the risk of flooding is rising, but the response of the carbon cycle of aquatic and associated riparian systems
to flooding is still unclear. Based on the data collected in the Lijiang, we found that flooding would lead to significant carbon emissions of fluvial areas and riparian areas during flooding, but carbon capture may happen after flooding. In the riparian areas, the surviving vegetation, especially clonal plants, played a vital role in this transformation.
Lauri Heiskanen, Juha-Pekka Tuovinen, Henriikka Vekuri, Aleksi Räsänen, Tarmo Virtanen, Sari Juutinen, Annalea Lohila, Juha Mikola, and Mika Aurela
Biogeosciences, 20, 545–572, https://doi.org/10.5194/bg-20-545-2023, https://doi.org/10.5194/bg-20-545-2023, 2023
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We measured and modelled the CO2 and CH4 fluxes of the terrestrial and aquatic ecosystems of the subarctic landscape for 2 years. The landscape was an annual CO2 sink and a CH4 source. The forest had the largest contribution to the landscape-level CO2 sink and the peatland to the CH4 emissions. The lakes released 24 % of the annual net C uptake of the landscape back to the atmosphere. The C fluxes were affected most by the rainy peak growing season of 2017 and the drought event in July 2018.
Artem G. Lim, Ivan V. Krickov, Sergey N. Vorobyev, Mikhail A. Korets, Sergey Kopysov, Liudmila S. Shirokova, Jan Karlsson, and Oleg S. Pokrovsky
Biogeosciences, 19, 5859–5877, https://doi.org/10.5194/bg-19-5859-2022, https://doi.org/10.5194/bg-19-5859-2022, 2022
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In order to quantify C transport and emission and main environmental factors controlling the C cycle in Siberian rivers, we investigated the largest tributary of the Ob River, the Ket River basin, by measuring spatial and seasonal variations in carbon CO2 and CH4 concentrations and emissions together with hydrochemical analyses. The obtained results are useful for large-scale modeling of C emission and export fluxes from permafrost-free boreal rivers of an underrepresented region of the world.
Robert J. Parker, Chris Wilson, Edward Comyn-Platt, Garry Hayman, Toby R. Marthews, A. Anthony Bloom, Mark F. Lunt, Nicola Gedney, Simon J. Dadson, Joe McNorton, Neil Humpage, Hartmut Boesch, Martyn P. Chipperfield, Paul I. Palmer, and Dai Yamazaki
Biogeosciences, 19, 5779–5805, https://doi.org/10.5194/bg-19-5779-2022, https://doi.org/10.5194/bg-19-5779-2022, 2022
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Wetlands are the largest natural source of methane, one of the most important climate gases. The JULES land surface model simulates these emissions. We use satellite data to evaluate how well JULES reproduces the methane seasonal cycle over different tropical wetlands. It performs well for most regions; however, it struggles for some African wetlands influenced heavily by river flooding. We explain the reasons for these deficiencies and highlight how future development will improve these areas.
Saúl Edgardo Martínez Castellón, José Henrique Cattanio, José Francisco Berrêdo, Marcelo Rollnic, Maria de Lourdes Ruivo, and Carlos Noriega
Biogeosciences, 19, 5483–5497, https://doi.org/10.5194/bg-19-5483-2022, https://doi.org/10.5194/bg-19-5483-2022, 2022
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We seek to understand the influence of climatic seasonality and microtopography on CO2 and CH4 fluxes in an Amazonian mangrove. Topography and seasonality had a contrasting influence when comparing the two gas fluxes: CO2 fluxes were greater in high topography in the dry period, and CH4 fluxes were greater in the rainy season in low topography. Only CO2 fluxes were correlated with soil organic matter, the proportion of carbon and nitrogen, and redox potential.
Matthias Koschorreck, Klaus Holger Knorr, and Lelaina Teichert
Biogeosciences, 19, 5221–5236, https://doi.org/10.5194/bg-19-5221-2022, https://doi.org/10.5194/bg-19-5221-2022, 2022
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At low water levels, parts of the bottom of rivers fall dry. These beaches or mudflats emit the greenhouse gas carbon dioxide (CO2) to the atmosphere. We found that those emissions are caused by microbial reactions in the sediment and that they change with time. Emissions were influenced by many factors like temperature, water level, rain, plants, and light.
Wantong Zhang, Zhengyi Hu, Joachim Audet, Thomas A. Davidson, Enze Kang, Xiaoming Kang, Yong Li, Xiaodong Zhang, and Jinzhi Wang
Biogeosciences, 19, 5187–5197, https://doi.org/10.5194/bg-19-5187-2022, https://doi.org/10.5194/bg-19-5187-2022, 2022
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This work focused on the CH4 and N2O emissions from alpine peatlands in response to the interactive effects of altered water table levels and increased nitrogen deposition. Across the 2-year mesocosm experiment, nitrogen deposition showed nonlinear effects on CH4 emissions and linear effects on N2O emissions, and these N effects were associated with the water table levels. Our results imply the future scenario of strengthened CH4 and N2O emissions from an alpine peatland.
Karel Castro-Morales, Anna Canning, Sophie Arzberger, Will A. Overholt, Kirsten Küsel, Olaf Kolle, Mathias Göckede, Nikita Zimov, and Arne Körtzinger
Biogeosciences, 19, 5059–5077, https://doi.org/10.5194/bg-19-5059-2022, https://doi.org/10.5194/bg-19-5059-2022, 2022
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Permafrost thaw releases methane that can be emitted into the atmosphere or transported by Arctic rivers. Methane measurements are lacking in large Arctic river regions. In the Kolyma River (northeast Siberia), we measured dissolved methane to map its distribution with great spatial detail. The river’s edge and river junctions had the highest methane concentrations compared to other river areas. Microbial communities in the river showed that the river’s methane likely is from the adjacent land.
Sonja Gindorf, Hermann W. Bange, Dennis Booge, and Annette Kock
Biogeosciences, 19, 4993–5006, https://doi.org/10.5194/bg-19-4993-2022, https://doi.org/10.5194/bg-19-4993-2022, 2022
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Methane is a climate-relevant greenhouse gas which is emitted to the atmosphere from coastal areas such as the Baltic Sea. We measured the methane concentration in the water column of the western Kiel Bight. Methane concentrations were higher in September than in June. We found no relationship between the 2018 European heatwave and methane concentrations. Our results show that the methane distribution in the water column is strongly affected by temporal and spatial variabilities.
Margaret Capooci and Rodrigo Vargas
Biogeosciences, 19, 4655–4670, https://doi.org/10.5194/bg-19-4655-2022, https://doi.org/10.5194/bg-19-4655-2022, 2022
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Tidal salt marsh soil emits greenhouse gases, as well as sulfur-based gases, which play roles in global climate but are not well studied as they are difficult to measure. Traditional methods of measuring these gases worked relatively well for carbon dioxide, but less so for methane, nitrous oxide, carbon disulfide, and dimethylsulfide. High variability of trace gases complicates the ability to accurately calculate gas budgets and new approaches are needed for monitoring protocols.
Janne Rinne, Patryk Łakomiec, Patrik Vestin, Joel D. White, Per Weslien, Julia Kelly, Natascha Kljun, Lena Ström, and Leif Klemedtsson
Biogeosciences, 19, 4331–4349, https://doi.org/10.5194/bg-19-4331-2022, https://doi.org/10.5194/bg-19-4331-2022, 2022
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The study uses the stable isotope 13C of carbon in methane to investigate the origins of spatial and temporal variation in methane emitted by a temperate wetland ecosystem. The results indicate that methane production is more important for spatial variation than methane consumption by micro-organisms. Temporal variation on a seasonal timescale is most likely affected by more than one driver simultaneously.
Kukka-Maaria Kohonen, Roderick Dewar, Gianluca Tramontana, Aleksanteri Mauranen, Pasi Kolari, Linda M. J. Kooijmans, Dario Papale, Timo Vesala, and Ivan Mammarella
Biogeosciences, 19, 4067–4088, https://doi.org/10.5194/bg-19-4067-2022, https://doi.org/10.5194/bg-19-4067-2022, 2022
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Four different methods for quantifying photosynthesis (GPP) at ecosystem scale were tested, of which two are based on carbon dioxide (CO2) and two on carbonyl sulfide (COS) flux measurements. CO2-based methods are traditional partitioning, and a new method uses machine learning. We introduce a novel method for calculating GPP from COS fluxes, with potentially better applicability than the former methods. Both COS-based methods gave on average higher GPP estimates than the CO2-based estimates.
Cited articles
Anthoni, P. M., Freibauer, A., Kolle, O., and Schulze, E. D.: Winter wheat
carbon exchange in Thuringia, Germany, Agr. Forest Meteorol., 121, 55–67,
https://doi.org/10.1016/s0168-1923(03)00162-x, 2004a.
Anthoni, P. M., Knohl, A., Rebmann, C., Freibauer, A., Mund, M., Ziegler,
W., Kolle, O., and Schulze, E. D.: Forest and agricultural
land-use-dependent CO2 exchange in Thuringia, Germany, Glob. Change
Biol., 10, 2005–2019, https://doi.org/10.1111/j.1365-2486.2004.00863.x, 2004b.
Aubinet, M., Grelle, A., Ibrom, A., Rannik, Ü., Moncrieff, J., Foken,
T., Kowalski, A. S., Martin, P. H., Berbigier, P., Bernhofer, C., Clement,
R., Elbers, J., Granier, A., Grunwald, T., Morgenstern, K., Pilegaard, K.,
Rebmann, C., Snijders, W., Valentini, R., and Vesala, T.: Estimates of the
annual net carbon and water exchange of forests: The EUROFLUX methodology,
Adv. Ecol. Res., 30, 113–175, 2000.
Aubinet, M., Moureaux, C., Bodson, B., Dufranne, D., Heinesch, B., Suleau,
M., Vancutsem, F., and Vilret, A.: Carbon sequestration by a crop over a
4-year sugar beet/winter wheat/seed potato/winter wheat rotation cycle,
Agr. Forest Meteorol., 149, 407–418, https://doi.org/10.1016/j.agrformet.2008.09.003,
2009.
Baker, J. M. and Griffis, T. J.: Examining strategies to improve the carbon
balance of corn/soybean agriculture using eddy covariance and mass balance
techniques, Agr. Forest Meteorol., 128, 163–177, https://doi.org/10.1016/j.agrformet.2004.11.005, 2005.
Baldocchi, D., Falge, E., Gu, L. H., Olson, R., Hollinger, D., Running, S.,
Anthoni, P., Bernhofer, C., Davis, K., Evans, R., Fuentes, J., Goldstein,
A., Katul, G., Law, B., Lee, X. H., Malhi, Y., Meyers, T., Munger, W.,
Oechel, W., U, K. T. P., Pilegaard, K., Schmid, H. P., Valentini, R., Verma,
S., Vesala, T., Wilson, K., and Wofsy, S.: FLUXNET: A new tool to study the
temporal and spatial variability of ecosystem-scale carbon dioxide, water
vapor, and energy flux densities, B. Am. Meteorol. Soc., 82, 2415–2434, 2001.
Béziat, P., Ceschia, E., and Dedieu, G.: Carbon balance of a three crop
succession over two cropland sites in South West France, Agr. Forest
Meteorol., 149, 1628–1645, https://doi.org/10.1016/j.agrformet.2009.05.004, 2009.
Bondeau, A., Smith, P. C., Zaehle, S., Schaphoff, S., Lucht, W., Cramer, W.,
Gerten, D., Lotze-Campen, H., Muller, C., Reichstein, M., and Smith, B.:
Modelling the role of agriculture for the 20th century global terrestrial
carbon balance, Glob. Change Biol., 13, 679–706, https://doi.org/10.1111/j.1365-2486.2006.01305.x, 2007.
Cao, G., Scanlon, B. R., Han, D., and Zheng, C.: Impacts of thickening
unsaturated zone on groundwater recharge in the North China Plain, J.
Hydrol., 537, 260–270, https://doi.org/10.1016/j.jhydrol.2016.03.049, 2016.
Ceschia, E., Béziat, P., Dejoux, J. F., Aubinet, M., Bernhofer, C.,
Bodson, B., Buchmann, N., Carrara, A., Cellier, P., Di Tommasi, P., Elbers,
J. A., Eugster, W., Grunwald, T., Jacobs, C. M. J., Jans, W. W. P., Jones,
M., Kutsch, W., Lanigan, G., Magliulo, E., Marloie, O., Moors, E. J.,
Moureaux, C., Olioso, A., Osborne, B., Sanz, M. J., Saunders, M., Smith, P.,
Soegaard, H., and Wattenbach, M.: Management effects on net ecosystem carbon
and GHG budgets at European crop sites, Agr. Ecosyst. Environ., 139,
363–383, https://doi.org/10.1016/j.agee.2010.09.020, 2010.
Chang, C. C. and Lin, C. J.: LIBSVM-A library for Support Vector Machines, available at:
http://www.csie.ntu.edu.tw/~cjlin/libsvm/ (last access: 15 March 2016), 2005.
Ciais, P., Wattenbach, M., Vuichard, N., Smith, P., Piao, S. L., Don, A.,
Luyssaert, S., Janssens, I. A., Bondeau, A., Dechow, R., Leip, A., Smith, P.
C., Beer, C., van der Werf, G. R., Gervois, S., Van Oost, K., Tomelleri, E.,
Freibauer, A., Schulze, E. D., and Team, C. S.: The European carbon balance.
Part 2: croplands, Glob. Change Biol., 16, 1409–1428, https://doi.org/10.1111/j.1365-2486.2009.02055.x, 2010.
Ciais, P., Gervois, S., Vuichard, N., Piao, S. L., and Viovy, N.: Effects of
land use change and management on the European cropland carbon balance,
Glob. Change Biol., 17, 320–338, https://doi.org/10.1111/j.1365-2486.2010.02341.x,
2011.
Cristianini, N. and Shawe-Taylor, J.: An Introduction to SupportVector
Machines and Other Kernel-Based Learning Methods, Cambridge Univ. Press,
Cambridge, UK, 189 pp., 2000.
Demyan, M. S., Ingwersen, J., Funkuin, Y. N., Ali, R. S.,
Mirzaeitalarposhti, R., Rasche, F., Poll, C., Muller, T., Streck, T.,
Kandeler, E., and Cadisch, G.: Partitioning of ecosystem respiration in
winter wheat and silage maize-modeling seasonal temperature effects, Agr.
Ecosyst. Environ., 224, 131–144, https://doi.org/10.1016/j.agee.2016.03.039, 2016.
de la Motte, L. G., Jérôme, E., Mamadou, O., Beckers, Y., Bodson,
B., Heinesch, B., and Aubinet, M.: Carbon balance of an intensively grazed
permanent grassland in southern Belgium, Agr. Forest Meteorol., 228–229,
370–383, https://doi.org/10.1016/j.agrformet.2016.06.009, 2016.
Dold, C., Büyükcangaz, H., Rondinelli, W., Prueger, J., Sauer, T.,
and Hatfield, J.: Long-term carbon uptake of agro-ecosystems in the Midwest,
Agr. Forest Meteorol., 232, 128–140, https://doi.org/10.1016/j.agrformet.2016.07.012,
2017.
Drewniak, B. A., Mishra, U., Song, J., Prell, J., and Kotamarthi, V. R.: Modeling the impact of agricultural land use and management on US carbon budgets, Biogeosciences, 12, 2119–2129, https://doi.org/10.5194/bg-12-2119-2015, 2015.
Eichelmann, E., Wagner-Riddle, C., Warland, J., Deen, B., and Voroney, P.:
Comparison of carbon budget, evapotranspiration, and albedo effect between
the biofuel crops switchgrass and corn, Agr. Ecosyst. Environ., 231,
271–282, https://doi.org/10.1016/j.agee.2016.07.007, 2016.
Ekblad, A., Bostrom, B., Holm, A., and Comstedt, D.: Forest soil respiration
rate and δ13C is regulated by recent above ground weather
conditions, Oecologia, 143, 136–142, https://doi.org/10.1007/s00442-004-1776-z, 2005.
Eugster, W., Moffat, A. M., Ceschia, E., Aubinet, M., Ammann, C., Osborne,
B., Davis, P. A., Smith, P., Jacobs, C., Moors, E., Le Dantec, V., Beziat,
P., Saunders, M., Jans, W., Grunwald, T., Rebmann, C., Kutsch, W. L.,
Czerny, R., Janous, D., Moureaux, C., Dufranne, D., Carrara, A., Magliulo,
V., Di Tommasi, P., Olesen, J. E., Schelde, K., Olioso, A., Bernhofer, C.,
Cellier, P., Larmanou, E., Loubet, B., Wattenbach, M., Marloie, O., Sanz, M.
J., Sogaard, H., and Buchmann, N.: Management effects on European cropland
respiration, Agr. Ecosyst. Environ., 139, 346–362, https://doi.org/10.1016/j.agee.2010.09.001, 2010.
Falkowski, P., Scholes, R. J., Boyle, E. E. A., Canadell, J., Canfield, D.,
Elser, J., Gruber, N., Hibbard, K., Högberg, P., Linder, S., and
Mackenzie, F. T.: The global carbon cycle: a test of our knowledge of earth
as a system, Science, 290, 291–296, https://doi.org/10.1126/science.290.5490.291, 2000.
Falge, E., Baldocchi, D., Olson, R., Anthoni, P., Aubinet, M., Bernhofer,
C., Burba, G., Ceulemans, R., Clement, R., Dolman, H., Granier, A., Gross,
P., Grunwald, T., Hollinger, D., Jensen, N. O., Katul, G., Keronen, P.,
Kowalski, A., Lai, C. T., Law, B. E., Meyers, T., Moncrieff, H., Moors, E.,
Munger, J. W., Pilegaard, K., Rannik, U., Rebmann, C., Suyker, A., Tenhunen,
J., Tu, K., Verma, S., Vesala, T., Wilson, K., and Wofsy, S.: Gap filling
strategies for defensible annual sums of net ecosystem exchange, Agr. Forest
Meteorol., 107, 43–69, https://doi.org/10.1016/S0168-1923(00)00225-2, 2001.
Falge, E., Baldocchi, D., Tenhunen, J., Aubinet, M., Bakwin, P., Berbigier,
P., Bernhofer, C., Burba, G., Clement, R., Davis, K. J., Elbers, J. A.,
Goldstein, A. H., Grelle, A., Granier, A., Guomundsson, J., Hollinger, D.,
Kowalski, A. S., Katul, G., Law, B. E., Malhi, Y., Meyers, T., Monson, R.
K., Munger, J. W., Oechel, W., Paw, K. T., Pilegaard, K., Rannik, U.,
Rebmann, C., Suyker, A., Valentini, R., Wilson, K., and Wofsy, S.:
Seasonality of ecosystem respiration and gross primary production as derived
from FLUXNET measurements, Agr. Forest Meteorol., 113, 53–74, https://doi.org/10.1016/S0168-1923(02)00102-8, 2002a.
Falge, E., Tenhunen, J., Baldocchi, D., Aubinet, M., Bakwin, P., Berbigier,
P., Bernhofer, C., Bonnefond, J. M., Burba, G., Clement, R., Davis, K. J.,
Elbers, J. A., Falk, M., Goldstein, A. H., Grelle, A., Granier, A.,
Grunwald, T., Gudmundsson, J., Hollinger, D., Janssens, I. A., Keronen, P.,
Kowalski, A. S., Katul, G., Law, B. E., Malhi, Y., Meyers, T., Monson, R.
K., Moors, E., Munger, J. W., Oechel, W., U, K. T. P., Pilegaard, K.,
Rannik, U., Rebmann, C., Suyker, A., Thorgeirsson, H., Tirone, G.,
Turnipseed, A., Wilson, K., and Wofsy, S.: Phase and amplitude of ecosystem
carbon release and uptake potentials as derived from FLUXNET measurements,
Agr. Forest Meteorol., 113, 75–95, https://doi.org/10.1016/S0168-1923(02)00103-X,
2002b.
Fargione, J. E., Bassett, S., Boucher, T., Bridgham, S. D., Conant, R. T.,
Cook-Patton, S. C., Ellis, P. W., Falcucci, A., Fourqurean, J. W.,
Gopalakrishna, T., Gu, H., Henderson, B., Hurteau, M. D., Kroeger, K. D.,
Kroeger, T., Lark, T. J., Leavitt, S. M., Lomax, G., McDonald, R. I.,
Megonigal, J. P., Miteva, D. A., Richardson, C. J., Sanderman, J., Shoch,
D., Spawn, S. A., Veldman, J. W., Williams, C. A., Woodbury, P. B., Zganjar,
C., Baranski, M., Elias, P., Houghton, R. A., Landis, E., McGlynn, E.,
Schlesinger, W. H., Siikamaki, J. V., Sutton-Grier, A. E., and Griscom, B.
W.: Natural climate solutions for the United States, Sci. Adv., 4, https://doi.org/10.1126/sciadv.aat1869, 2018.
Fleisher, D. H., Timlin, D. J., and Reddy, V. R.: Elevated carbon dioxide
and water stress effects on potato canopy gas exchange, water use, and
productivity, Agr. Forest Meteorol., 148, 1109–1122, https://doi.org/10.1016/j.agrformet.2008.02.007, 2008.
Forkel, M., Carvalhais, N., Rödenbeck, C., Keeling, R., Heimann, M.,
Thonicke, K., Zaehle, S., and Reichstein, M.: Enhanced seasonal CO2
exchange caused by amplified plant productivity in northern ecosystems,
Science, 351, 696–699, https://doi.org/10.1126/science.aac4971, 2016.
Freibauer, A., Rounsevell, M. D. A., Smith, P., and Verhagen, J.: Carbon
sequestration in the agricultural soils of Europe, Geoderma, 122, 1–23,
https://doi.org/10.1016/j.geoderma.2004.01.021, 2004.
Gao, X., Gu, F., Hao, W., Mei, X., Li, H., Gong, D., and Zhang, Z.: Carbon
budget of a rainfed spring maize cropland with straw returning on the Loess
Plateau, China, Sci. Total Environ., 586, 1193–1203,
https://doi.org/10.1016/j.scitotenv.2017.02.113, 2017.
Gilmanov, T. G., Verma, S. B., Sims, P. L., Meyers, T. P., Bradford, J. A.,
Burba, G. G., and Suyker, A. E.: Gross primary production and light response
parameters of four Southern Plains ecosystems estimated using long-term
CO2-flux tower measurements, Global Biogeochem. Cy., 17, 1071,
https://doi.org/10.1029/2002gb002023, 2003.
Grant, R. F., Arkebauer, T. J., Dobermann, A., Hubbard, K. G., Schimelfenig,
T. T., Suyker, A. E., Verma, S. B., and Walters, D. T.: Net biome
productivity of irrigated and rainfed maize-soybean rotations: Modeling vs.
measurements, Agron. J., 99, 1404–1423, https://doi.org/10.2134/agronj2006.0308, 2007.
Gray, J. M., Frolking, S., Kort, E. A., Ray, D. K., Kucharik, C. J.,
Ramankutty, N., and Friedl, M. A.: Direct human influence on atmospheric
CO2 seasonality from increased cropland productivity, Nature, 515,
398–401, https://doi.org/10.1038/nature13957, 2014.
Griscom, B. W., Adams, J., Ellis, P. W., Houghton, R. A., Lomax, G., Miteva,
D. A., Schlesinger, W. H., Shoch, D., Siikamaki, J. V., Smith, P., Woodbury,
P., Zganjar, C., Blackman, A., Campari, J., Conant, R. T., Delgado, C.,
Elias, P., Gopalakrishna, T., Hamsik, M. R., Herrero, M., Kiesecker, J.,
Landis, E., Laestadius, L., Leavitt, S. M., Minnemeyer, S., Polasky, S.,
Potapov, P., Putz, F. E., Sanderman, J., Silvius, M., Wollenberg, E., and
Fargione, J.: Natural climate solutions, P. Natl. Acad. Sci. USA, 114,
11645–11650, https://doi.org/10.1073/pnas.1710465114, 2017.
Heimann, M. and Reichstein, M.: Terrestrial ecosystem carbon dynamics and
climate feedbacks, Nature, 451, 289–292, https://doi.org/10.1038/Nature06591, 2008.
Hollinger, S. E., Bernacchi, C. J., and Meyers, T. P.: Carbon budget of
mature no-till ecosystem in North Central Region of the United States,
Agr. Forest Meteorol., 130, 59–69, https://doi.org/10.1016/j.agrformet.2005.01.005,
2005.
Hsieh, C. I., Katul, G., and Chi, T.: An approximate analytical model for
footprint estimation of scaler fluxes in thermally stratified atmospheric
flows, Adv. Water Resour., 23, 765–772, https://doi.org/10.1016/S0309-1708(99)00042-1,
2000.
Huang, Y., Zhang, W., Sun, W. J., and Zheng, X. H.: Net primary production
of Chinese croplands from 1950 to 1999, Ecol. Appl., 17, 692–701, https://doi.org/10.1890/05-1792, 2007.
Hunt, J. E., Laubach, J., Barthel, M., Fraser, A., and Phillips, R. L.: Carbon budgets for an irrigated intensively grazed dairy pasture and an unirrigated winter-grazed pasture, Biogeosciences, 13, 2927–2944, https://doi.org/10.5194/bg-13-2927-2016, 2016.
Hutchinson, J. J., Campbell, C. A., and Desjardins, R. L.: Some perspectives
on carbon sequestration in agriculture, Agr. Forest Meteorol., 142, 288–302,
https://doi.org/10.1016/j.agrformet.2006.03.030, 2007.
Iwasaki, H., Saito, H., Kuwao, K., Maximov, T. C., and Hasegawa, S.: Forest decline caused by high soil water conditions in a permafrost region, Hydrol. Earth Syst. Sci., 14, 301–307, https://doi.org/10.5194/hess-14-301-2010, 2010.
Jans, W. W. P., Jacobs, C. M. J., Kruijt, B., Elbers, J. A., Barendse, S.,
and Moors, E. J.: Carbon exchange of a maize (Zea mays L.) crop: Influence of
phenology, Agr. Ecosyst. Environ., 139, 316–324, https://doi.org/10.1016/j.agee.2010.06.008, 2010.
Kang, M., Ichii, K., Kim, J., Indrawati, Y. M., Park, J., Moon, M., Lim, J.
H., and Chun, J. H.: New gap-filling strategies for long-period flux data
gaps using a data-driven approach, Atmosphere-Basel, 10, 568, https://doi.org/10.3390/Atmos10100568, 2019.
Kendy, E., Gerard-Marchant, P., Walter, M. T., Zhang, Y. Q., Liu, C. M., and
Steenhuis, T. S.: A soil-water-balance approach to quantify groundwater
recharge from irrigated cropland in the North China Plain, Hydrol. Process.,
17, 2011–2031, https://doi.org/10.1002/hyp.1240, 2003.
Kim, Y., Johnson, M. S., Knox, S. H., Black, T. A., Dalmagro, H. J., Kang, M.,
Kim, J., and Baldocchi, D.: Gap-filling approaches for eddy covariance methane
fluxes: A comparison of three machine learning algorithms and a traditional
method with principal component analysis, Glob. Change Biol., 26, 1–20, https://doi.org/10.1111/gcb.14845, 2019.
Kutsch, W. L., Aubinet, M., Buchmann, N., Smith, P., Osborne, B., Eugster,
W., Wattenbach, M., Schrumpf, M., Schulze, E. D., Tomelleri, E., Ceschia,
E., Bernhofer, C., Beziat, P., Carrara, A., Di Tommasi, P., Grunwald, T.,
Jones, M., Magliulo, V., Marloie, O., Moureaux, C., Olioso, A., Sanz, M. J.,
Saunders, M., Sogaard, H., and Ziegler, W.: The net biome production of full
crop rotations in Europe, Agr. Ecosyst. Environ., 139, 336–345, https://doi.org/10.1016/j.agee.2010.07.016, 2010.
Lal, R.: World cropland soils as a source or sink for atmospheric carbon,
Adv. Agron., 71, 145–191, 2001.
Latimer, R. N. C. and Risk, D. A.: An inversion approach for determining distribution of production and temperature sensitivity of soil respiration, Biogeosciences, 13, 2111–2122, https://doi.org/10.5194/bg-13-2111-2016, 2016.
Lei, H. M. and Yang, D. W.: Seasonal and interannual variations in carbon
dioxide exchange over a cropland in the North China Plain, Glob. Change
Biol., 16, 2944–2957, https://doi.org/10.1111/j.1365-2486.2009.02136.x, 2010.
Lei, H. M., Yang, D. W., Cai, J. F., and Wang, F. J.: Long-term variability
of the carbon balance in a large irrigated area along the lower Yellow River
from 1984 to 2006, Sci. China Earth Sci., 56, 671–683, https://doi.org/10.1007/s11430-012-4473-5, 2013.
Li, J., Yu, Q., Sun, X. M., Tong, X. J., Ren, C. Y., Wang, J., Liu, E. M.,
Zhu, Z. L., and Yu, G. R.: Carbon dioxide exchange and the mechanism of
environmental control in a farmland ecosystem in North China Plain, Sci.
China Ser. D, 49, 226–240, https://doi.org/10.1007/s11430-006-8226-1, 2006.
Luo, Y., He, C. S., Sophocleous, M., Yin, Z. F., Ren, H. R., and Zhu, O. Y.:
Assessment of crop growth and soil water modules in SWAT2000 using extensive
field experiment data in an irrigation district of the Yellow River Basin, J.
Hydrol., 352, 139–156, https://doi.org/10.1016/j.jhydrol.2008.01.003, 2008.
Mauder, M. and Foken, T.: Documentation and instruction manual of the eddy
covariance software package TK2, Abt.
Mikrometeorologie, Arbeitsergebnisse, Universität Bayreuth, 2004.
Mauder, M. and Foken, T.: Documentation and instruction manual of the
eddy-covariance software package TK3, Abt.
Mikrometeorologie, Arbeitsergebnisse, Universität Bayreuth, 2011.
Moureaux, C., Debacq, A., Bodson, B., Heinesch, B., and Aubinet, M.: Annual
net ecosystem carbon exchange by a sugar beet crop, Agr. Forest Meteorol.,
139, 25–39, https://doi.org/10.1016/j.agrformet.2006.05.009, 2006.
Moureaux, C., Debacq, A., Hoyaux, J., Suleau, M., Tourneur, D., Vancutsem,
F., Bodson, B., and Aubinet, M.: Carbon balance assessment of a Belgian
winter wheat crop (Triticum aestivum L.), Glob. Change Biol., 14, 1353–1366, https://doi.org/10.1111/j.1365-2486.2008.01560.x, 2008.
National Standards of Environmental Protection of the People's Republic of China: Soil–Determination of organic carbon – Combustion oxidation-titration method, HJ658-2013, Ministry of environmental protection, P.R. China, Beijing, 2013.
Özdoğan, M.: Exploring the potential contribution of irrigation to
global agricultural primary productivity, Global Biogeochem. Cy., 25, GB3016,
https://doi.org/10.1029/2009GB003720, 2011.
Phillips, C. L., Nickerson, N., Risk, D., and Bond, B. J.: Interpreting diel
hysteresis between soil respiration and temperature, Glob. Change Biol.,
17, 515–527, https://doi.org/10.1111/j.1365-2486.2010.02250.x, 2011.
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,
https://doi.org/10.1111/j.1469-8137.2011.03952.x, 2012.
Poulter, B., Frank, D., Ciais, P., Myneni, R. B., Andela, N., Bi, J.,
Broquet, G., Canadell, J. G., Chevallier, F., Liu, Y. Y., and Running, S. W.:
Contribution of semi-arid ecosystems to interannual variability of the
global carbon cycle, Nature, 509, 600–603, https://doi.org/10.1038/nature13376, 2014.
Reichstein, M., Falge, E., Baldocchi, D., Papale, D., Aubinet, M.,
Berbigier, P., Bernhofer, C., Buchmann, N., Gilmanov, T., Granier, A.,
Grunwald, T., Havrankova, K., Ilvesniemi, H., Janous, D., Knohl, A.,
Laurila, T., Lohila, A., Loustau, D., Matteucci, G., Meyers, T., Miglietta,
F., Ourcival, J. M., Pumpanen, J., Rambal, S., Rotenberg, E., Sanz, M.,
Tenhunen, J., Seufert, G., Vaccari, F., Vesala, T., Yakir, D., and
Valentini, R.: On the separation of net ecosystem exchange into assimilation
and ecosystem respiration: review and improved algorithm, Glob. Change
Biol., 11, 1424–1439, https://doi.org/10.1111/j.1365-2486.2005.001002.x, 2005.
Sauerbeck, D. R.: CO2 emissions and C sequestration by agriculture –
perspectives and limitations, Nutr. Cycl. Agroecosys., 60, 253–266, https://doi.org/10.1023/A:1012617516477, 2001.
Schmidt, M., Reichenau, T. G., Fiener, P., and Schneider, K.: The carbon
budget of a winter wheat field: An eddy covariance analysis of seasonal and
inter-annual variability, Agr. Forest Meteorol., 165, 114–126, https://doi.org/10.1016/j.agrformet.2012.05.012, 2012.
Shen, Y., Zhang, Y., Scanlon, B. R., Lei, H., Yang, D., and Yang, F:
Energy/water budgets and productivity of the typical croplands irrigated
with groundwater and surface water in the North China Plain, Agr. Forest
Meteorol., 181, 133–142, https://doi.org/10.1016/j.agrformet.2013.07.013, 2013.
Smith, P.: Carbon sequestration in croplands: the potential in Europe and
the global context, Eur. J. Agron., 20, 229–236, https://doi.org/10.1016/j.eja.2003.08.002, 2004.
Smith, W. K., Cleveland, C. C., Reed, S. C., and Running, S. W.:
Agricultural conversion without external water and nutrient inputs reduces
terrestrial vegetation productivity, Geophys. Res. Lett., 41, 449–455, https://doi.org/10.1002/2013GL058857, 2014.
Suleau, M., Moureaux, C., Dufranne, D., Buysse, P., Bodson, B., Destain, J.
P., Heinesch, B., Debacq, A., and Aubinet, M.: Respiration of three Belgian
crops: Partitioning of total ecosystem respiration in its heterotrophic,
above- and below-ground autotrophic components, Agr. Forest Meteorol., 151,
633–643, https://doi.org/10.1016/j.agrformet.2011.01.012, 2011.
Taylor, A. M., Amiro, B. D., and Fraser, T. J.: Net CO2 exchange and
carbon budgets of a three-year crop rotation following conversion of
perennial lands to annual cropping in Manitoba, Canada, Agr. Forest
Meteorol., 182–183, 67–75, https://doi.org/10.1016/j.agrformet.2013.07.008, 2013.
Terazawa, K., Maruyama, Y., and Morikawa, Y.: Photosynthetic and Stomatal
Responses of Larix-Kaempferi Seedlings to Short-Term Waterlogging, Ecol.
Res., 7, 193–197, https://doi.org/10.1007/Bf02348500, 1992.
Tian, H., Melillo, J., Kicklighter, D., McGuire, A., and Helfrich, J.: The
sensitivity of terrestrial carbon storage to historical climate variability
and atmospheric CO2 in the United States, Tellus B, 51, 414–452, 1999.
Ueyama, M., Ichii, K., Iwata, H., Euskirchen, E. S., Zona, D., Rocha, A. V.,
Harazono, Y., Iwama, C., Nakai, T., and Oechel, W. C.: Upscaling terrestrial
carbon dioxide fluxes in Alaska with satellite remote sensing and support
vector regression, J. Geophys. Res.-Biogeo., 118, 1266–1281, https://doi.org/10.1002/jgrg.20095, 2013.
van Wesemael, B., Paustian, K., Meersmans, J., Goidts, E., Barancikova, G.,
and Easter, M.: Agricultural management explains historic changes in
regional soil carbon stocks, P. Natl. Acad. Sci. USA, 107, 14926–14930, https://doi.org/10.1073/pnas.1002592107, 2010.
Verma, S. B., Dobermann, A., Cassman, K. G., Walters, D. T., Knops, J. M.,
Arkebauer, T. J., Suyker, A. E., Burba, G. G., Amos, B., Yang, H. S.,
Ginting, D., Hubbard, K. G., Gitelson, A. A., and Walter-Shea, E. A.: Annual
carbon dioxide exchange in irrigated and rainfed maize-based agroecosystems,
Agr. Forest Meteorol., 131, 77–96, https://doi.org/10.1016/j.agrformet.2005.05.003,
2005.
Vick, E. S. K., Stoy, P. C., Tang, A. C. I., and Gerken, T.: The
surface-atmosphere exchange of carbon dioxide, water, and sensible heat
across a dryland wheat-fallow rotation, Agr. Ecosyst. Environ.,
232, 129–140, https://doi.org/10.1016/j.agee.2016.07.018, 2016.
Wang, Y. Y., Hu, C. S., Dong, W. X., Li, X. X., Zhang, Y. M., Qin, S. P.,
and Oenema, O.: Carbon budget of a winter-wheat and summer-maize rotation
cropland in the North China Plain, Agr. Ecosyst. Environ., 206, 33–45,
https://doi.org/10.1016/j.agee.2015.03.016, 2015.
Wolf, J., West, T. O., Le Page, Y., Kyle, G. P., Zhang, X., Collatz, G. J.,
and Imhoff, M. L.: Biogenic carbon fluxes from global agricultural
production and consumption, Global Biogeochem. Cy., 29, 1617–1639, https://doi.org/10.1002/2015gb005119, 2015.
Zhang, Q., Lei, H. M., and Yang, D. W.: Seasonal variations in soil
respiration, heterotrophic respiration and autotrophic respiration of a
wheat and maize rotation cropland in the North China Plain, Agr. Forest
Meteorol., 180, 34–43, https://doi.org/10.1016/j.agrformet.2013.04.028, 2013.
Zhang, Q., Katul, G. G., Oren, R., Daly, E., Manzoni, S., and Yang, D. W.:
The hysteresis response of soil CO2 concentration and soil respiration
to soil temperature, J. Geophys. Res.-Biogeo., 120, 1605–1618, https://doi.org/10.1002/2015JG003047, 2015a.
Zhang, Q., Lei, H. M., Yang, D. W., Bo, H. B., and Cai, J. F.: On the diel
characteristics of soil respiration over the North China Plain, J. Tsinghua
University (Science and Technology), 55, 33–38, 2015b (in Chinese with
English abstract).
Zhang, Q., Phillips, R. P., Manzoni, S., Scott, R. L., Oishi, A. C., Finzi, A.,
Daly, E., Vargas, R., and Novick, K. A.: Changes in photosynthesis and soil
moisture drive the seasonal soil respiration-temperature hysteresis
relationship, Agr. Forest Meteorol., 259, 184–195, https://doi.org/10.1016/j.agrformet.2018.05.005, 2018.
Zhang, Y. Q., Yu, Q., Jiang, J., and Tang, Y. H.: Calibration of Terra/MODIS
gross primary production over an irrigated cropland on the North China Plain
and an alpine meadow on the Tibetan Plateau, Glob. Change Biol., 14,
757–767, https://doi.org/10.1111/j.1365-2486.2008.01538.x, 2008.
Zhao, M. S., Heinsch, F. A., Nemani, R. R., and Running, S. W.: Improvements
of the MODIS terrestrial gross and net primary production global data set,
Remote Sens. Environ., 95, 164–176, https://doi.org/10.1016/j.rse.2004.12.011, 2005.
Short summary
Research into climate change has been popular over the past few decades. Greenhouse gas emissions are found to be responsible for climate change. Among all the ecosystems, cropland is the main food source for mankind, therefore its carbon cycle and contribution to the global carbon balance interest us. Our evaluation of the typical wheat–maize rotation cropland over the North China Plain shows it is a net CO2 emission to the atmosphere and that emissions will continue to rise in the future.
Research into climate change has been popular over the past few decades. Greenhouse gas...
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