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Millennial-scale hydroclimate control of tropical soil carbon storage 期刊论文
NATURE, 2020, 581 (7806) : 63-+
作者:  Lam, Tommy Tsan-Yuk;  Jia, Na;  Zhang, Ya-Wei;  Shum, Marcus Ho-Hin;  Jiang, Jia-Fu;  Zhu, Hua-Chen;  Tong, Yi-Gang;  Shi, Yong-Xia;  Ni, Xue-Bing;  Liao, Yun-Shi;  Li, Wen-Juan;  Jiang, Bao-Gui;  Wei, Wei;  Yuan, Ting-Ting;  Zheng, Kui;  Cui, Xiao-Ming;  Li, Jie;  Pei, Guang-Qian
收藏  |  浏览/下载:25/0  |  提交时间:2020/05/13

Over the past 18,000 years, the residence time and amount of soil carbon stored in the Ganges-Brahmaputra basin have been controlled by the intensity of Indian Summer Monsoon rainfall, with greater carbon destabilization during wetter, warmer conditions.


The storage of organic carbon in the terrestrial biosphere directly affects atmospheric concentrations of carbon dioxide over a wide range of timescales. Within the terrestrial biosphere, the magnitude of carbon storage can vary in response to environmental perturbations such as changing temperature or hydroclimate(1), potentially generating feedback on the atmospheric inventory of carbon dioxide. Although temperature controls the storage of soil organic carbon at mid and high latitudes(2,3), hydroclimate may be the dominant driver of soil carbon persistence in the tropics(4,5)  however, the sensitivity of tropical soil carbon turnover to large-scale hydroclimate variability remains poorly understood. Here we show that changes in Indian Summer Monsoon rainfall have controlled the residence time of soil carbon in the Ganges-Brahmaputra basin over the past 18,000 years. Comparison of radiocarbon ages of bulk organic carbon and terrestrial higher-plant biomarkers with co-located palaeohydrological records(6) reveals a negative relationship between monsoon rainfall and soil organic carbon stocks on a millennial timescale. Across the deglaciation period, a depletion of basin-wide soil carbon stocks was triggered by increasing rainfall and associated enhanced soil respiration rates. Our results suggest that future hydroclimate changes in tropical regions are likely to accelerate soil carbon destabilization, further increasing atmospheric carbon dioxide concentrations.


  
Evidence for large carbon sink and long residence time in semiarid forests based on 15 year flux and inventory records 期刊论文
GLOBAL CHANGE BIOLOGY, 2019
作者:  Qubaja, Rafat;  Grunzweig, Jose M.;  Rotenberg, Eyal;  Yakir, Dan
收藏  |  浏览/下载:13/0  |  提交时间:2020/02/17
carbon sequestration  carbon sink  carbon turnover time  ecosystem productivity  semiarid  soil carbon  
Underestimated ecosystem carbon turnover time and sequestration under the steady state assumption: A perspective from long-term data assimilation 期刊论文
GLOBAL CHANGE BIOLOGY, 2019, 25 (3) : 938-953
作者:  Ge, Rong;  He, Honglin;  Ren, Xiaoli;  Zhang, Li;  Yu, Guirui;  Smallman, T. Luke;  Zhou, Tao;  Yu, Shi-Yong;  Luo, Yiqi;  Xie, Zongqiang;  Wang, Silong;  Wang, Huimin;  Zhou, Guoyi;  Zhang, Qibin;  Wang, Anzhi;  Fan, Zexin;  Zhang, Yiping;  Shen, Weijun;  Yin, Huajun;  Lin, Luxiang
收藏  |  浏览/下载:13/0  |  提交时间:2019/04/09
carbon sequestration  climate sensitivity  non-steady state  steady state  turnover time  
Carbon cycle confidence and uncertainty: Exploring variation among soil biogeochemical models 期刊论文
GLOBAL CHANGE BIOLOGY, 2018, 24 (4) : 1563-1579
作者:  Wieder, William R.;  Hartman, Melannie D.;  Sulman, Benjamin N.;  Wang, Ying-Ping;  Koven, Charles D.;  Bonan, Gordon B.
收藏  |  浏览/下载:8/0  |  提交时间:2019/04/09
biogeochemistry  carbon cycle  earth system models  global change  microbial models  soil organic matter  structural uncertainty  turnover time  
Temperature sensitivity of soil organic carbon decomposition increased with mean carbon residence time: Field incubation and data assimilation 期刊论文
GLOBAL CHANGE BIOLOGY, 2018, 24 (2) : 810-822
作者:  Zhou, Xuhui;  Xu, Xia;  Zhou, Guiyao;  Luo, Yiqi
收藏  |  浏览/下载:7/0  |  提交时间:2019/04/09
C turnover time  data assimilation  field incubation  soil organic carbon decomposition  warming