DOI: 10.1175/JCLI-D-11-00213.1
Scopus记录号: 2-s2.0-84863054243
论文题名: Influence of mean flow on the ENSO-vertical wind shear relationship over the northern tropical Atlantic
作者: Zhu X. ; Saravanan R. ; Chang P.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 3 起始页码: 858
结束页码: 864
语种: 英语
Scopus关键词: Air sea interactions
; Atlantic hurricane
; Background flow
; Climate change simulations
; Climate model simulations
; Climate modeling
; Climate variability
; ENSO
; ENSO events
; Environmental factors
; Hurricane activity
; Influence of ENSO
; Mean flow
; Model simulation
; Nonlinear nature
; Nonlinear superposition
; Realistic simulation
; Tropical atlantic
; Tropical cyclogenesis
; Upper troposphere
; Vertical shear
; Vertical wind shear
; Wind shears
; Zonal flows
; Atmospheric pressure
; Climate change
; Computer simulation
; Hurricanes
; Nickel compounds
; Tropics
; Shear flow
; air-sea interaction
; climate change
; climate modeling
; climate variation
; cyclogenesis
; El Nino-Southern Oscillation
; environmental factor
; hurricane
; troposphere
; westerly
; wind shear
; zonal flow
; Atlantic Ocean
; Atlantic Ocean (Tropical)
英文摘要: Vertical wind shear over the tropical Atlantic Ocean plays an important role in mediating hurricane activity. The vertical shear variability over the main development region for Atlantic hurricanes is affected by local factors as well as by the remote influence of the El Niño-Southern Oscillation (ENSO) phenomenon, as indicated by observational and climate modeling analyses. Climate model simulations of the ENSO-shear relationship are compared with observations. It is shown that there is a strong influence of background mean flow on the ENSO-shear relationship, because of the inherently nonlinear nature of vertical wind shear. In particular, the simulation of zonal flow over the tropical Atlantic is shown to play a critical role in how the remote influence of ENSO modulates the shear. Even with realistic simulations of the ENSO-induced westerly anomaly in the upper troposphere, overestimated easterly background flow in the model simulations can alter the relationship between ENSO and vertical wind shear, resulting in decreased vertical wind shear during warm ENSO events. This nonlinear superposition has important implications for the assessment of trends in large-scale environmental factors affecting tropical cyclogenesis in climate change simulations. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52561
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Atmospheric Sciences, Texas A and M University, College Station, TX, United States; State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou, Zhejiang, China
Recommended Citation:
Zhu X.,Saravanan R.,Chang P.. Influence of mean flow on the ENSO-vertical wind shear relationship over the northern tropical Atlantic[J]. Journal of Climate,2012-01-01,25(3)