DOI: 10.1175/JCLI-D-12-00142.1
Scopus记录号: 2-s2.0-84874808179
论文题名: Sensitivity of global tropical climate to land surface processes: Mean state and interannual variability
作者: Ma H.-Y. ; Xiao H. ; Mechoso C.R. ; Xue Y.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 5 起始页码: 1818
结束页码: 1837
语种: 英语
Scopus关键词: Atmosphere-land interactions
; Atmosphere-ocean interactions
; ENSO
; Land surface models
; Seasonal cycle
; Atmospheric thermodynamics
; Computer simulation
; Heat convection
; Soil moisture
; Tropics
; Vegetation
; Surface measurement
; air-sea interaction
; annual variation
; atmosphere-biosphere interaction
; atmosphere-hydrosphere interaction
; atmospheric convection
; atmospheric general circulation model
; El Nino-Southern Oscillation
; global climate
; land surface
; oceanic convection
; oceanic general circulation model
; sea surface temperature
; seasonal variation
; sensitivity analysis
; Pacific Ocean
; Pacific Ocean (Equatorial)
英文摘要: This study examines the sensitivity of the global climate to land surface processes (LSP) using an atmospheric general circulation model both uncoupled (with prescribed SSTs) and coupled to an oceanic general circulation model. The emphasis is on the interactive soil moisture and vegetation biophysical processes, which have firstorder influence on the surface energy and water budgets. The sensitivity to those processes is represented by the differences between model simulations, in which two land surface schemes are considered: 1) a simple land scheme that specifies surface albedo and soilmoisture availability and 2) the Simplified SimpleBiosphereModel (SSiB), which allows for consideration of interactive soil moisture and vegetation biophysical process. Observational datasets are also employed to assess the extent to which results are realistic. The mean state sensitivity to different LSP is stronger in the coupled mode, especially in the tropical Pacific. Furthermore, the seasonal cycle of SSTs in the equatorial Pacific, as well as the ENSO frequency, amplitude, and locking to the seasonal cycle of SSTs, is significantly modified and more realistic with SSiB. This outstanding sensitivity of the atmosphere-ocean system develops through changes in the intensity of equatorial Pacific trades modified by convection over land. The results further demonstrate that the direct impact of land-atmosphere interactions on the tropical climate is modified by feedbacks associated with perturbed oceanic conditions ("indirect effect" of LSP). The magnitude of such an indirect effect is strong enough to suggest that comprehensive studies on the importance of LSP on the global climate have to be made in a system that allows for atmosphere-ocean interactions. © 2013 American Meteorological Society.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51995
Appears in Collections: 气候变化事实与影响
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作者单位: Program for Climate Model Diagnosis and Intercomparison, Lawrence Livermore National Laboratory, Livermore, CA, United States; Atmospheric Sciences and Global Change Division, Pacific North National Laboratory, Richland, WA, United States; Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, Los Angeles, CA, United States; Department of Atmospheric and Oceanic Sciences, Department of Geography, University of California, Los Angeles, Los Angeles, CA, United States
Recommended Citation:
Ma H.-Y.,Xiao H.,Mechoso C.R.,et al. Sensitivity of global tropical climate to land surface processes: Mean state and interannual variability[J]. Journal of Climate,2013-01-01,26(5)