Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/NCLIMATE3421 |
Higher climatological temperature sensitivity of soil carbon in cold than warm climates | |
Koven, Charles D.1; Hugelius, Gustaf2,3,4; Lawrence, David M.5; Wieder, William R.5,6 | |
2017-11-01 | |
发表期刊 | NATURE CLIMATE CHANGE |
ISSN | 1758-678X |
EISSN | 1758-6798 |
出版年 | 2017 |
卷号 | 7期号:11 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Sweden |
英文摘要 | The projected loss of soil carbon to the atmosphere resulting from climate change is a potentially large but highly uncertain feedback to warming. The magnitude of this feedback is poorly constrained by observations and theory, and is disparately represented in Earth system models (ESMs)(1-3). To assess the climatological temperature sensitivity of soil carbon, we calculate apparent soil carbon turnover times(4) that reflect long-term and broad-scale rates of decomposition. Here, we show that the climatological temperature control on carbon turnover in the top metre of global soils is more sensitive in cold climates than in warm climates and argue that it is critical to capture this emergent ecosystem property in global-scale models. We present a simplified model that explains the observed high cold-climate sensitivity using only the physical scaling of soil freeze-thaw state across climate gradients. Current ESMs fail to capture this pattern, except in anESMthat explicitly resolves vertical gradients in soil climate and carbon turnover. An observed weak tropical temperature sensitivity emerges in a different model that explicitly resolves mineralogical control on decomposition. These results support projections of strong carbon- climate feedbacks from northern soils(5,6) and demonstrate a method for ESMs to capture this emergent behaviour. |
领域 | 资源环境 |
收录类别 | SCI-E ; SSCI |
WOS记录号 | WOS:000414250600019 |
WOS关键词 | EARTH SYSTEM MODELS ; GLOBAL VEGETATION MODEL ; PERMAFROST CARBON ; RESPIRATION ; FEEDBACKS ; DYNAMICS ; STORAGE ; DECOMPOSITION ; 21ST-CENTURY ; IMPROVEMENTS |
WOS类目 | Environmental Sciences ; Environmental Studies ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/34175 |
专题 | 资源环境科学 |
作者单位 | 1.Lawrence Berkeley Natl Lab, Earth & Environm Sci Div, Berkeley, CA 94720 USA; 2.Stockholm Univ, Dept Phys Geog, SE-10691 Stockholm, Sweden; 3.Stockholm Univ, Bolin Ctr Climate Res, SE-10691 Stockholm, Sweden; 4.Stanford Univ, Sch Earth Energy & Environm Sci, Stanford, CA 94305 USA; 5.Natl Ctr Atmospher Res, Climate & Global Dynam Lab, Boulder, CO 80305 USA; 6.Univ Colorado, Inst Arctic & Alpine Res, Boulder, CO 80309 USA |
推荐引用方式 GB/T 7714 | Koven, Charles D.,Hugelius, Gustaf,Lawrence, David M.,et al. Higher climatological temperature sensitivity of soil carbon in cold than warm climates[J]. NATURE CLIMATE CHANGE,2017,7(11). |
APA | Koven, Charles D.,Hugelius, Gustaf,Lawrence, David M.,&Wieder, William R..(2017).Higher climatological temperature sensitivity of soil carbon in cold than warm climates.NATURE CLIMATE CHANGE,7(11). |
MLA | Koven, Charles D.,et al."Higher climatological temperature sensitivity of soil carbon in cold than warm climates".NATURE CLIMATE CHANGE 7.11(2017). |
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