DOI: 10.1175/JCLI-D-17-0481.1
Scopus记录号: 2-s2.0-85047066955
论文题名: Mean, variability, and trend of Southern Ocean wind stress: 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: 2018
卷: 31, 期: 9 起始页码: 3557
结束页码: 3573
语种: 英语
英文关键词: Atmosphere-ocean interaction
; Forcing
; Southern Ocean
; Wind
; Wind stress
Scopus关键词: Atmospheric thermodynamics
; Ocean currents
; Wind
; Antarctic Circumpolar Currents
; Atmosphere-ocean interactions
; Forcing
; Meridional overturning circulations
; Southern Annular Mode
; Southern ocean
; Stress calculations
; Wind variabilities
; Wind stress
英文摘要: The Southern Ocean (SO) surface westerly wind stress plays a fundamental role in driving the Antarctic Circumpolar Current and the global meridional overturning circulation. Here, the authors investigate the contributions of atmospheric wind fluctuations to the mean, variability, and trend of SO wind stress over the last four decades using NCEP reanalysis and ERA-Interim products. Including wind variability at synoptic frequencies (2-8 days) and higher in the stress calculation is found to increase the strength of the mean SO wind stress by almost 40% in both reanalysis products. The southern annular mode index is found to be a good indicator for the strength of the mean wind and mean wind stress, but not as good an indicator for wind fluctuations, at least for the chosen study period. Large discrepancies between reanalysis products emerge regarding the contributions of wind fluctuations to the strengthening trend of SO wind stress. Between one-third and one-half of the stress trend in NCEP can be explained by the increase in the intensity of wind fluctuations, while the stress trend in ERA-Interim is due entirely to the increasing strength of the mean westerly wind. This trend discrepancy may have important climatic implications since the sensitivity of SO circulation to wind stress changes depends strongly on how these stress changes are brought about. Given the important role of wind fluctuations in shaping the SO wind stress, studies of the SO response to wind stress changes need to account for changes of wind fluctuations in the past and future. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111564
Appears in Collections: 气候减缓与适应
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作者单位: Polar Climate System and Global Change Laboratory, Nanjing University of Information Science and Technology, Nanjing, China; Centre for Ocean and Atmospheric Sciences, School of Environmental Sciences, University of East Anglia, Norwich, United Kingdom; College of Oceanography, Hohai University, Nanjing, China; British Antarctic Survey, Cambridge, United Kingdom
Recommended Citation:
Lin X.,Zhai X.,Wang Z.,et al. Mean, variability, and trend of Southern Ocean wind stress: Role of wind fluctuations[J]. Journal of Climate,2018-01-01,31(9)