Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/s41558-019-0468-y |
C-14 evidence that millennial and fast-cycling soil carbon are equally sensitive to warming | |
Vaughn, Lydia J. S.1,2; Torn, Margaret S.1,3 | |
2019-06-01 | |
发表期刊 | NATURE CLIMATE CHANGE |
ISSN | 1758-678X |
EISSN | 1758-6798 |
出版年 | 2019 |
卷号 | 9期号:6页码:467-+ |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The Arctic is expected to shift from a sink to a source of atmospheric CO2 this century due to climate-induced increases in soil carbon mineralization(1). The magnitude of this effect remains uncertain, largely because temperature sensitivities of organic matter decomposition(2,3) and the distribution of these temperature sensitivities across soil carbon pools(4) are not well understood. Here, a new analytical method with natural abundance radiocarbon was used to evaluate temperature sensitivities across soil carbon pools. With soils from Utqiagvik (formerly Barrow), Alaska, an incubation experiment was used to evaluate soil carbon age and decomposability, disentangle the effects of temperature and substrate depletion on carbon mineralization, and compare temperature sensitivities of fast-cycling and slow-cycling carbon. Old, historically stable carbon was shown to be vulnerable to decomposition under warming. Using radiocarbon to differentiate between slow-cycling and fast-cycling carbon, temperature sensitivity was found to be invariant among pools, with a Q(10) of similar to 2 irrespective of native decomposition rate. These findings suggest that mechanisms other than chemical recalcitrance mediate the effect of warming on soil carbon mineralization. |
领域 | 资源环境 |
收录类别 | SCI-E ; SSCI |
WOS记录号 | WOS:000469265500017 |
WOS关键词 | ORGANIC-MATTER POOLS ; TEMPERATURE SENSITIVITY ; PERMAFROST CARBON ; ARCTIC TUNDRA ; ECOSYSTEM RESPIRATION ; DECOMPOSITION ; RADIOCARBON ; CO2 ; BARROW ; OLD |
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/183916 |
专题 | 资源环境科学 |
作者单位 | 1.Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA; 2.Univ Calif Berkeley, Integrat Biol, Berkeley, CA 94720 USA; 3.Univ Calif Berkeley, Energy & Resources Grp, Berkeley, CA 94720 USA |
推荐引用方式 GB/T 7714 | Vaughn, Lydia J. S.,Torn, Margaret S.. C-14 evidence that millennial and fast-cycling soil carbon are equally sensitive to warming[J]. NATURE CLIMATE CHANGE,2019,9(6):467-+. |
APA | Vaughn, Lydia J. S.,&Torn, Margaret S..(2019).C-14 evidence that millennial and fast-cycling soil carbon are equally sensitive to warming.NATURE CLIMATE CHANGE,9(6),467-+. |
MLA | Vaughn, Lydia J. S.,et al."C-14 evidence that millennial and fast-cycling soil carbon are equally sensitive to warming".NATURE CLIMATE CHANGE 9.6(2019):467-+. |
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