DOI: 10.1016/j.gloplacha.2012.10.006
论文题名: Mean residence time of global topsoil organic carbon depends on temperature, precipitation and soil nitrogen
作者: Chen S. ; Huang Y. ; Zou J. ; Shi Y.
刊名: Global and Planetary Change
ISSN: 0921-8353
出版年: 2013
卷: 100 起始页码: 99
结束页码: 108
语种: 英语
英文关键词: Anomalies
; Global
; Mean residence time (MRT)
; Precipitation
; Soil nitrogen
; Soil organic carbon
; Temperature
Scopus关键词: Anomalies
; Global
; Mean residence time
; Soil nitrogen
; Soil organic carbon
; Carbon
; Ecosystems
; Global warming
; Precipitation (chemical)
; Temperature
; Climate models
; air temperature
; carbon sequestration
; climate modeling
; global warming
; latitude
; organic carbon
; organic soil
; precipitation (climatology)
; residence time
; soil nitrogen
; spatial variation
; temperature anomaly
; temporal variation
; terrestrial ecosystem
; topsoil
; uncertainty analysis
英文摘要: Mean residence time (MRT) of topsoil organic carbon is one critical parameter for predicting future land carbon sink dynamics. Large uncertainties remain about controls on the variability in global MRT of soil organic carbon. We estimated global MRT of topsoil (0-20. cm) organic carbon in terrestrial ecosystems and found that mean annual air temperature, annual precipitation, and topsoil nitrogen storage were responsible for the variability in MRT. An empirical climate and soil nitrogen-based (Clim&SN) model could be used to explain the temporal and spatial variability in MRT across various ecosystems. Estimated MRT was lowest in the low-latitude zones, and increased toward high-latitude zones. Global MRT of topsoil organic carbon showed a significant declining tendency between 1960 and 2008, particularly in the high-latitude zone of the northern hemisphere. The largest absolute and relative changes (0.2% per yr) in MRT of topsoil organic carbon from 1960 to 2008 occurred in high-latitude regions, consistent with large carbon stocks in, and greater degree of climate change being experienced by, these areas. Overall, global MRT anomalies (differences between MRT in each year and averaged value of MRT from 1960 to 2008) of terrestrial topsoil organic carbon were decreasing from 1960 to 2008. Global MRT anomalies decreased significantly (P< 0.001) with the increase of global temperature anomalies, indicating that global warming resulted in faster turnover rates of topsoil organic carbon. © 2012 Elsevier B.V. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84868473115&doi=10.1016%2fj.gloplacha.2012.10.006&partnerID=40&md5=eb71298fbfc9ba14939cf22fbde1142b
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/11259
Appears in Collections: 全球变化的国际研究计划
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作者单位: School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, 210044, China
Recommended Citation:
Chen S.,Huang Y.,Zou J.,et al. Mean residence time of global topsoil organic carbon depends on temperature, precipitation and soil nitrogen[J]. Global and Planetary Change,2013-01-01,100.