DOI: 10.1002/2015MS000504
Scopus记录号: 2-s2.0-84978326129
论文题名: Comparison of effects of cold-region soil/snow processes and the uncertainties from model forcing data on permafrost physical characteristics
作者: Barman R ; , Jain A ; K
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2016
卷: 8, 期: 1 起始页码: 453
结束页码: 466
语种: 英语
英文关键词: Biogeochemistry
; Carbon
; Climate models
; Compaction
; Degradation
; Organic carbon
; Snow
; Soils
; Uncertainty analysis
; Biogeophysics
; Energy cycle
; Permafrost area
; Permafrost degradation
; Water cycle
; Permafrost
; atmospheric forcing
; biogeochemistry
; cold region
; degradation
; energy flow
; environmental degradation
; geophysics
; hydrological cycle
; land surface
; organic carbon
; permafrost
; physical property
; rhizosphere
; snow cover
; soil temperature
; uncertainty analysis
英文摘要: We used a land surface model to (1) evaluate the influence of recent improvements in modeling cold-region soil/snow physics on near-surface permafrost physical characteristics (within 0-3 m soil column) in the northern high latitudes (NHL) and (2) compare them with uncertainties from climate and land-cover data sets. Specifically, four soil/snow processes are investigated: deep soil energetics, soil organic carbon (SOC) effects on soil properties, wind compaction of snow, and depth hoar formation. In the model, together they increased the contemporary NHL permafrost area by 9.2 × 106 km2 (from 2.9 to 12.3 - without and with these processes, respectively) and reduced historical degradation rates. In comparison, permafrost area using different climate data sets (with annual air temperature difference of 0.5°C) differed by up to 2.3 × 106 km2, with minimal contribution of up to 0.7 × 106 km2 from substantial land-cover differences. Individually, the strongest role in permafrost increase was from deep soil energetics, followed by contributions from SOC and wind compaction, while depth hoar decreased permafrost. The respective contribution on 0-3 m permafrost stability also followed a similar pattern. However, soil temperature and moisture within vegetation root zone (0-1 m), which strongly influence soil biogeochemistry, were only affected by the latter three processes. The ecosystem energy and water fluxes were impacted the least due to these soil/snow processes. While it is evident that simulated permafrost physical characteristics benefit from detailed treatment of cold-region biogeophysical processes, we argue that these should also lead to integrated improvements in modeling of biogeochemistry. © 2016. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75923
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: Department of Atmospheric Sciences, University of Illinois, Urbana, IL, United States
Recommended Citation:
Barman R,, Jain A,K. Comparison of effects of cold-region soil/snow processes and the uncertainties from model forcing data on permafrost physical characteristics[J]. Journal of Advances in Modeling Earth Systems,2016-01-01,8(1)