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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.


  
Present-Day Subsidence in the Ganges-Brahmaputra-Meghna Delta: Eastern Amplification of the Holocene Sediment Loading Contribution 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019
作者:  Krien, Y.;  Karpytchev, M.;  Ballu, V;  Becker, M.;  Grall, C.;  Goodbred, S.;  Calmant, S.;  Shum, C. K.;  Khan, Z.
收藏  |  浏览/下载:7/0  |  提交时间:2019/11/27
land subsidence  sediment loading  relative sea level rise  Ganges-Brahmaputra-Meghna Delta  
Enhanced flood risk with 1.5 degrees C global warming in the Ganges-Brahmaputra-Meghna basin 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2019, 14 (7)
作者:  Uhe, P. F.;  Mitchell, D. M.;  Bates, P. D.;  Sampson, C. C.;  Smith, A. M.;  Islam, A. S.
收藏  |  浏览/下载:6/0  |  提交时间:2019/11/27
flooding  climate change  Ganges-Brahmaputra-Meghna  1.5 degrees C global warming  
Strong Influence of Irrigation on Water Budget and Land Surface Temperature in Indian Subcontinental River Basins 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2019, 124 (3) : 1449-1462
作者:  Shah, Harsh L.;  Zhou, Tian;  Huang, Maoyi;  Mishra, Vimal
收藏  |  浏览/下载:4/0  |  提交时间:2019/04/09
irrigation  land surface temperature  VIC model  Ganges  evapotranspiration  runoff  
Assessing regional climate simulations of the last 30 years (1982-2012) over Ganges-Brahmaputra-Meghna River Basin 期刊论文
CLIMATE DYNAMICS, 2017, 49
作者:  Khandu;  Awange, Joseph L.;  Anyah, Richard;  Kuhn, Michael;  Fukuda, Yoichi
收藏  |  浏览/下载:2/0  |  提交时间:2019/04/09
Ganges-Brahmaputra-Meghna  Regional climate models  Precipitation  Temperature  Climate variability  Onset  Withdrawal  Indian monsoon  
Evaluation of WRF PBL parameterization schemes against direct observations during a dry event over the Ganges valley 期刊论文
ATMOSPHERIC RESEARCH, 2017, 193
作者:  Sathyanadh, Anusha;  Prabha, Thara V.;  Balaji, B.;  Resmi, E. A.;  Karipot, Anandakumar
收藏  |  浏览/下载:7/0  |  提交时间:2019/04/09
WRF model  Heat wave  Planetary boundary layer parameterization  Local and non-local schemes  Ganges valley  CAIPEEX  
Changes and variability of precipitation and temperature in the Ganges-Brahmaputra-Meghna River Basin based on global high-resolution reanalyses 期刊论文
INTERNATIONAL JOURNAL OF CLIMATOLOGY, 2017, 37 (4)
作者:  Khandu;  Awange, Joseph L.;  Kuhn, Michael;  Anyah, Richard;  Forootan, Ehsan
收藏  |  浏览/下载:5/0  |  提交时间:2019/04/09
Ganges-Brahmaputra-Meghna River Basin  climate  reanalysis  satellite remote-sensing  precipitation  temperature