DOI: 10.1175/JCLI-D-13-00092.1
Scopus记录号: 2-s2.0-84892553187
论文题名: Comparison of the SST-forced responses between coupled and uncoupled climate simulations
作者: Chen H. ; Schneider E.K.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 2 起始页码: 740
结束页码: 756
语种: 英语
Scopus关键词: Atmospheric circulation
; Atmospheric fields
; Atmospheric model
; Climate simulation
; Noise decorrelation
; North atlantic oscillation indices
; PERFECT model
; SST anomalies
; Atmospheric thermodynamics
; Climate change
; Testing
; Oceanography
; atmosphere-ocean coupling
; atmospheric general circulation model
; climate forcing
; El Nino-Southern Oscillation
; monsoon
; oceanic general circulation model
; sea surface temperature
; temperature anomaly
英文摘要: It is commonly assumed that a reasonable estimate of the SST-forced component of the observed atmospheric circulation is given by an atmospheric GCM (AGCM) forced with the observed SST. However, there are results that find different SST-forced responses from the observed, for example for the ENSO-monsoon relationship, and suggest that these differences are due to lack of coupling to the ocean rather than atmospheric model bias unrelated to coupling. Here, the coupling issue is isolated and examined through perfect model experiments. A coupled atmosphere-ocean GCM (CGCM) simulation and an AGCM simulation forced by the SST from the CGCMare compared to examine whether the SST-forced responses are the same. This question cannot be addressed directly, since the SST-forced response of the CGCM is a priori unknown. Therefore, two indirect tests are applied, based on the assumption that the noise decorrelation time scale is short compared to a month. The first test is to compare the time-lagged linear regressions of the atmospheric fields onto several SST indices (defined as the area-averaged SST anomalies in the tropics or extratropics), with SST leading the atmosphere by a month. The second test is to compare the time lagged linear covariances of several atmospheric indices (including two monsoon indices and a North Atlantic Oscillation index) and SST, with the SST leading the atmosphere by a month. Both tests find that the SST-forced responses are the same in the CGCM and SST-forced AGCM. These tests can be extended to compare the SST-forced responses between different AGCMs, CGCMs, and observations. © 2014 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51270
Appears in Collections: 气候变化事实与影响
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作者单位: Center for ocean-land-atmosphere studies, Calverton, MD, United States; Department of Atmospheric, Oceanic, and Earth Sciences, George Mason University, Fairfax, VA, United States; Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing university of information science and technology, Nanjing, Jiangsu, China
Recommended Citation:
Chen H.,Schneider E.K.. Comparison of the SST-forced responses between coupled and uncoupled climate simulations[J]. Journal of Climate,2014-01-01,27(2)