气候变化领域集成服务门户(CCPortal): Southern Ocean wind stress in CMIP5 models: Role of wind fluctuations

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DOI	10.1175/JCLI-D-19-0466.1
	Southern Ocean wind stress in CMIP5 models: Role of wind fluctuations
	Lin X.; Zhai X.; Wang Z.; Munday D.R.
发表日期	2020
ISSN	0894-8755
起始页码	1209
结束页码	1226
卷号	33 期号:4
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.
英文关键词	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
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171447
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
推荐引用方式 GB/T 7714	Lin X.,Zhai X.,Wang Z.,et al. Southern Ocean wind stress in CMIP5 models: Role of wind fluctuations[J],2020,33(4).
APA	Lin X.,Zhai X.,Wang Z.,&Munday D.R..(2020).Southern Ocean wind stress in CMIP5 models: Role of wind fluctuations.Journal of Climate,33(4).
MLA	Lin X.,et al."Southern Ocean wind stress in CMIP5 models: Role of wind fluctuations".Journal of Climate 33.4(2020).