GSTDTAP

浏览/检索结果: 共76条,第1-10条 帮助

已选(0)清除 条数/页:   排序方式:
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.


  
Sentinel-1 observation frequency significantly increases burnt area detectability in tropical SE Asia 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2020, 15 (5)
作者:  Carreiras, Joao M. B.;  Quegan, Shaun;  Tansey, Kevin;  Page, Susan
收藏  |  浏览/下载:8/0  |  提交时间:2020/07/02
burnt area  tropics  Sentinel-1  radar  machine learning  Indonesia  
Vertical Temperature Structure Associated with Evaporation of Stratiform Precipitation in Idealized WRF Simulations 期刊论文
JOURNAL OF THE ATMOSPHERIC SCIENCES, 2020, 77 (5) : 1851-1864
作者:  Virman, M.;  Bister, M.;  Sinclair, V. A.;  Raeisaenen, J.;  Jaervinen, H.
收藏  |  浏览/下载:8/0  |  提交时间:2020/07/02
Tropics  Deep convection  Precipitation  Evaporation  Humidity  Cloud parameterizations  
Convective Dynamics and the Response of Precipitation Extremes to Warming in Radiative-Convective Equilibrium 期刊论文
JOURNAL OF THE ATMOSPHERIC SCIENCES, 2020, 77 (5) : 1637-1660
作者:  Abbott, Tristan H.;  Cronin, Timothy W.;  Beucler, Tom
收藏  |  浏览/下载:8/0  |  提交时间:2020/07/02
Tropics  Extreme events  Precipitation  Radiative-convective equilibrium  Climate change  Cloud resolving models  
Axisymmetric Hadley Cell Theory with a Fixed Tropopause Temperature Rather than Height 期刊论文
JOURNAL OF THE ATMOSPHERIC SCIENCES, 2020, 77 (4) : 1279-1294
作者:  Hill, Spencer A.;  Bordoni, Simona;  Mitchell, Jonathan L.
收藏  |  浏览/下载:5/0  |  提交时间:2020/07/02
Atmosphere  Tropics  Atmospheric circulation  Hadley circulation  Momentum  
Quasigeostrophic Controls on Precipitating Ascent in Monsoon Depressions 期刊论文
JOURNAL OF THE ATMOSPHERIC SCIENCES, 2020, 77 (4) : 1213-1232
作者:  Murthy, Varun S.;  Boos, William R.
收藏  |  浏览/下载:6/0  |  提交时间:2020/07/02
Tropics  Convective storms  systems  Vertical motion  Monsoons  Precipitation  Vortices  
A Mechanism for the Maintenance of Sharp Tropical Margins 期刊论文
JOURNAL OF THE ATMOSPHERIC SCIENCES, 2020, 77 (4) : 1181-1197
作者:  Masunaga, Hirohiko;  Mapes, Brian E.
收藏  |  浏览/下载:9/0  |  提交时间:2020/07/02
Tropics  Convection  Water vapor  Satellite observations  Single column models  
Tracer-Aided Modeling in the Low-Relief, Wet-Dry Tropics Suggests Water Ages and DOC Export Are Driven by Seasonal Wetlands and Deep Groundwater 期刊论文
WATER RESOURCES RESEARCH, 2020, 56 (4)
作者:  Birkel, Christian;  Duvert, Clement;  Correa, Alicia;  Munksgaard, Niels C.;  Maher, Damien T.;  Hutley, Lindsay B.
收藏  |  浏览/下载:10/0  |  提交时间:2020/07/02
wet-dry tropics  tracer-aided models  water age  DOC  savanna woodland  wetland  
Controls on the Tropical Response to Abrupt Climate Changes 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2020, 47 (6)
作者:  Roberts, W. H. G.;  Hoperoft, P. O.
收藏  |  浏览/下载:7/0  |  提交时间:2020/07/02
abrupt climate changes  tropics  ITCZ  paleoclimate  teleconnections  
Evaluating the CMIP5 ensemble in Ethiopia: Creating a reduced ensemble for rainfall and temperature in Northwest Ethiopia and the Awash basin 期刊论文
INTERNATIONAL JOURNAL OF CLIMATOLOGY, 2019
作者:  Dyer, Ellen;  Washington, Richard;  Taye, Meron Teferi
收藏  |  浏览/下载:17/0  |  提交时间:2020/02/17
climate  ensembles  general circulation models  policy  rainfall  seasonal  tropics