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High Production of Soluble Iron Promoted by Aerosol Acidification in Fog 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2020, 47 (12)
作者:  Shi, Jinhui;  Guan, Yang;  Ito, Akinori;  Gao, Huiwang;  Yao, Xiaohong;  Baker, Alex R.;  Zhang, Daizhou
收藏  |  浏览/下载:10/0  |  提交时间:2020/06/16
aerosol acidification  dust  fog  haze  iron solubility  observation model comparison  
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.


  
Focus on the role of forests and soils in meeting climate change mitigation goals: summary 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2020, 15 (4)
作者:  Moomaw, William R.;  Law, Beverly E.;  Goetz, Scott J.
收藏  |  浏览/下载:17/0  |  提交时间:2020/07/02
natural climate solutions  forest and soil carbon  tropical forests  carbon sequestration  forest products carbon storage  forest carbon accounting  forest bioenergy accounting  
Groundwater as a major source of dissolved organic matter to Arctic coastal waters 期刊论文
NATURE COMMUNICATIONS, 2020, 11 (1)
作者:  Connolly, Craig T.;  Cardenas, M. Bayani;  Burkart, Greta A.;  Spencer, Robert G. M.;  McClelland, James W.
收藏  |  浏览/下载:8/0  |  提交时间:2020/05/13
Recycling and metabolic flexibility dictate life in the lower oceanic crust 期刊论文
NATURE, 2020, 579 (7798) : 250-+
作者:  Zhou, Peng;  Yang, Xing-Lou;  Wang, Xian-Guang;  Hu, Ben;  Zhang, Lei;  Zhang, Wei;  Si, Hao-Rui;  Zhu, Yan;  Li, Bei;  Huang, Chao-Lin;  Chen, Hui-Dong;  Chen, Jing;  Luo, Yun;  Guo, Hua;  Jiang, Ren-Di;  Liu, Mei-Qin;  Chen, Ying;  Shen, Xu-Rui;  Wang, Xi;  Zheng, Xiao-Shuang;  Zhao, Kai;  Chen, Quan-Jiao;  Deng, Fei;  Liu, Lin-Lin;  Yan, Bing;  Zhan, Fa-Xian;  Wang, Yan-Yi;  Xiao, Geng-Fu;  Shi, Zheng-Li
收藏  |  浏览/下载:37/0  |  提交时间:2020/05/13

The lithified lower oceanic crust is one of Earth'  s last biological frontiers as it is difficult to access. It is challenging for microbiota that live in marine subsurface sediments or igneous basement to obtain sufficient carbon resources and energy to support growth(1-3) or to meet basal power requirements(4) during periods of resource scarcity. Here we show how limited and unpredictable sources of carbon and energy dictate survival strategies used by low-biomass microbial communities that live 10-750 m below the seafloor at Atlantis Bank, Indian Ocean, where Earth'  s lower crust is exposed at the seafloor. Assays of enzyme activities, lipid biomarkers, marker genes and microscopy indicate heterogeneously distributed and viable biomass with ultralow cell densities (fewer than 2,000 cells per cm(3)). Expression of genes involved in unexpected heterotrophic processes includes those with a role in the degradation of polyaromatic hydrocarbons, use of polyhydroxyalkanoates as carbon-storage molecules and recycling of amino acids to produce compounds that can participate in redox reactions and energy production. Our study provides insights into how microorganisms in the plutonic crust are able to survive within fractures or porous substrates by coupling sources of energy to organic and inorganic carbon resources that are probably delivered through the circulation of subseafloor fluids or seawater.


  
Onshore-offshore correlations of Cretaceous fluvial-deltaic sequences, southern Baltimore Canyon trough 期刊论文
AAPG BULLETIN, 2020, 104 (2) : 411-448
作者:  Schmelz, William J.;  Miller, Kenneth G.;  Mountain, Gregory S.;  Browning, James, V;  Baldwin, Kimberly E.
收藏  |  浏览/下载:5/0  |  提交时间:2020/05/13
Ocean Carbon Storage across the middle Miocene: a new interpretation for the Monterey Event 期刊论文
NATURE COMMUNICATIONS, 2020, 11 (1)
作者:  Sosdian, S. M.;  Babila, T. L.;  Greenop, R.;  Foster, G. L.;  Lear, C. H.
收藏  |  浏览/下载:4/0  |  提交时间:2020/05/13
Global cooling linked to increased glacial carbon storage via changes in Antarctic sea ice 期刊论文
NATURE GEOSCIENCE, 2019, 12 (12) : 1001-+
作者:  Marzocchi, Alice;  Jansen, Malte F.
收藏  |  浏览/下载:9/0  |  提交时间:2020/02/16
A See-Saw in Pacific Subantarctic Mode Water Formation Driven by Atmospheric Modes 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019, 46 (22) : 13152-13160
作者:  Meijers, A. J. S.;  Cerovecki, I.;  King, B. A.;  Tamsitt, V.
收藏  |  浏览/下载:3/0  |  提交时间:2020/02/17
Southern Ocean  Mode Water  Heat uptake  Variability  Atmospheric modes  
Rapid expansion of northern peatlands and doubled estimate of carbon storage 期刊论文
NATURE GEOSCIENCE, 2019, 12 (11) : 917-+
作者:  Nichols, Jonathan E.;  Peteet, Dorothy M.
收藏  |  浏览/下载:10/0  |  提交时间:2020/02/16