DOI: 10.5194/tc-10-465-2016
Scopus记录号: 2-s2.0-84959516525
论文题名: The importance of a surface organic layer in simulating permafrost thermal and carbon dynamics
作者: Jafarov E ; , Schaefer K
刊名: Cryosphere
ISSN: 19940416
出版年: 2016
卷: 10, 期: 1 起始页码: 465
结束页码: 475
语种: 英语
英文关键词: active layer
; air-soil interaction
; carbon cycle
; carbon sequestration
; frozen ground
; gas exchange
; heat flux
; organic matter
; permafrost
; soil carbon
; spatial distribution
英文摘要: Permafrost-affected soils contain twice as much carbon as currently exists in the atmosphere. Studies show that warming of the perennially frozen ground could initiate significant release of the frozen soil carbon into the atmosphere. Initializing the frozen permafrost carbon with the observed soil carbon distribution from the Northern Circumpolar Soil Carbon Database reduces the uncertainty associated with the modeling of the permafrost carbon feedback. To improve permafrost thermal and carbon dynamics we implemented a dynamic surface organic layer with vertical carbon redistribution, and introduced dynamic root growth controlled by active layer thickness, which improved soil carbon exchange between frozen and thawed pools. These changes increased the initial amount of simulated frozen carbon from 313 to 560 Gt C, consistent with observed frozen carbon stocks, and increased the spatial correlation of the simulated and observed distribution of frozen carbon from 0.12 to 0.63. © 2016 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75181
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Institute of Arctic and Alpine Research, University of Colorado at Boulder, Boulder, CO, United States; National Snow and Ice Data Center, Cooperative Institute for Research in Environmental Sciences, University of Colorado at Boulder, Boulder, CO, United States
Recommended Citation:
Jafarov E,, Schaefer K. The importance of a surface organic layer in simulating permafrost thermal and carbon dynamics[J]. Cryosphere,2016-01-01,10(1)