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气候变化将导致热带雨带在区域的不均衡变化 快报文章
气候变化快报,2021年第3期
作者:  廖琴
Microsoft Word(12Kb)  |  收藏  |  浏览/下载:490/0  |  提交时间:2021/02/05
High Latitudes  Complex Terrain  Future Land Cover Scenarios  
植树造林并不能作为高纬度地区的气候变化减缓政策 快报文章
气候变化快报,2021年第2期
作者:  董利苹
Microsoft Word(14Kb)  |  收藏  |  浏览/下载:511/0  |  提交时间:2021/01/20
High Latitudes  Complex Terrain  Future Land Cover Scenarios  
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.


  
The projected timing of abrupt ecological disruption from climate change 期刊论文
NATURE, 2020, 580 (7804) : 496-+
作者:  Gorgulla, Christoph;  Boeszoermenyi, Andras;  Wang, Zi-Fu;  Fischer, Patrick D.;  Coote, Paul W.;  Padmanabha Das, Krishna M.;  Malets, Yehor S.;  Radchenko, Dmytro S.;  Moroz, Yurii S.;  Scott, David A.;  Fackeldey, Konstantin;  Hoffmann, Moritz;  Iavniuk, Iryna;  Wagner, Gerhard;  Arthanari, Haribabu
收藏  |  浏览/下载:56/0  |  提交时间:2020/05/13

As anthropogenic climate change continues the risks to biodiversity will increase over time, with future projections indicating that a potentially catastrophic loss of global biodiversity is on the horizon(1-3). However, our understanding of when and how abruptly this climate-driven disruption of biodiversity will occur is limited because biodiversity forecasts typically focus on individual snapshots of the future. Here we use annual projections (from 1850 to 2100) of temperature and precipitation across the ranges of more than 30,000 marine and terrestrial species to estimate the timing of their exposure to potentially dangerous climate conditions. We project that future disruption of ecological assemblages as a result of climate change will be abrupt, because within any given ecological assemblage the exposure of most species to climate conditions beyond their realized niche limits occurs almost simultaneously. Under a high-emissions scenario (representative concentration pathway (RCP) 8.5), such abrupt exposure events begin before 2030 in tropical oceans and spread to tropical forests and higher latitudes by 2050. If global warming is kept below 2 degrees C, less than 2% of assemblages globally are projected to undergo abrupt exposure events of more than 20% of their constituent species  however, the risk accelerates with the magnitude of warming, threatening 15% of assemblages at 4 degrees C, with similar levels of risk in protected and unprotected areas. These results highlight the impending risk of sudden and severe biodiversity losses from climate change and provide a framework for predicting both when and where these events may occur.


Using annual projections of temperature and precipitation to estimate when species will be exposed to potentially harmful climate conditions reveals that disruption of ecological assemblages as a result of climate change will be abrupt and could start as early as the current decade.


  
Pronounced and unavoidable impacts of low-end global warming on northern high-latitude land ecosystems 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2020, 15 (4)
作者:  Ito, Akihiko;  Reyer, Christopher P. O.;  Gaedeke, Anne;  Ciais, Philippe;  Chang, Jinfeng;  Chen, Min;  Francois, Louis;  Forrest, Matthew;  Hickler, Thomas;  Ostberg, Sebastian;  Shi, Hao;  Thiery, Wim;  Tian, Hanqin
收藏  |  浏览/下载:16/0  |  提交时间:2020/07/02
biome sector  ISIMIP2b  northern high latitudes  Paris agreement  climatic impacts  
High-Latitude Observations of a Localized Wind Wall and Its Coupling to the Lower Thermosphere 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2018, 45 (10) : 4586-4593
作者:  Shepherd, Gordon G.;  Shepherd, Marianna G.
收藏  |  浏览/下载:5/0  |  提交时间:2019/04/09
thermosphere  neutral winds  dynamic reversals  high latitudes  longitude dependence  wind wall  
Impacts of snow on soil temperature observed across the circumpolar north 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2018, 13 (4)
作者:  Zhang, Yu;  Sherstiukov, Artem B.;  Qian, Budong;  Kokelj, Steven V.;  Lantz, Trevor C.
收藏  |  浏览/下载:16/0  |  提交时间:2019/04/09
soil temperature  soil-air temperature difference  snow  northern high latitudes  
Novel three-pattern decomposition of global atmospheric circulation: generalization of traditional two-dimensional decomposition 期刊论文
CLIMATE DYNAMICS, 2017, 49
作者:  Hu, Shujuan;  Cheng, Jianbo;  Chou, Jifan
收藏  |  浏览/下载:6/0  |  提交时间:2019/04/09
Vortex circulation in the middle-high latitudes  Overturning circulation in the tropics  Traditional two-dimensional decomposition  Three-pattern decomposition of global atmospheric circulation  Decomposition of vertical vorticity