DOI: 10.1175/JCLI-D-19-0466.1
论文题名: Southern Ocean wind stress in CMIP5 models: Role of wind fluctuations
作者: Lin X. ; Zhai X. ; Wang Z. ; Munday D.R.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2020
卷: 33, 期: 4 语种: 英语
Scopus关键词: Climate models
; Ocean currents
; Antarctic Circumpolar Currents
; Atmospheric forcing
; Coupled Model Intercomparison Project
; Different time scale
; Overturning circulation
; Stress calculations
; Surface wind stress
; Wind fluctuation
; Wind stress
; atmospheric forcing
; climate modeling
; CMIP
; overturn
; surface wind
; westerly
; wind stress
; Antarctic Circumpolar Current
; Southern Ocean
英文摘要: The Southern Ocean (SO) surface wind stress is a major atmospheric forcing for driving the Antarctic Circumpolar Current and the global overturning circulation. Here the effects of wind fluctuations at different time scales on SO wind stress in 18 models from phase 5 of the Coupled Model Intercomparison Project (CMIP5) are investigated. It is found that including wind fluctuations, especially on time scales associated with synoptic storms, in the stress calculation strongly enhances the mean strength, modulates the seasonal cycle, and significantly amplifies the trends of SO wind stress. In 11 out of the 18 CMIP5 models, the SO wind stress has strengthened significantly over the period of 1960–2005. Among them, the strengthening trend of SO wind stress in one CMIP5 model is due to the increase in the intensity of wind fluctuations, while in all the other 10 models the strengthening trend is due to the increasing strength of the mean westerly wind. These discrepancies in SO wind stress trend in CMIP5 models may explain some of the diverging behaviors in the model-simulated SO circulation. Our results suggest that to reduce the uncertainty in SO responses to wind stress changes in the coupled models, both the mean wind and wind fluctuations need to be better simulated. © 2020 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159290
Appears in Collections: 气候变化与战略
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作者单位: College of Oceanography, International Polar Environment Research Laboratory, Hohai University, Nanjing, China; Centre for Ocean and Atmospheric Sciences, School of Environmental Sciences, University of East Anglia, Norwich, United Kingdom; British Antarctic Survey, Cambridge, United Kingdom
Recommended Citation:
Lin X.,Zhai X.,Wang Z.,et al. Southern Ocean wind stress in CMIP5 models: Role of wind fluctuations[J]. Journal of Climate,2020-01-01,33(4)