DOI: 10.1175/JCLI-D-11-00647.1
Scopus记录号: 2-s2.0-84867690580
论文题名: Tropical cyclone climatology of the south pacific ocean and its relationship to El Niño-Southern oscillation
作者: Dowdy A.J. ; Qi L. ; Jones D. ; Ramsay H. ; Fawcett R. ; Kuleshov Y.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 18 起始页码: 6108
结束页码: 6122
语种: 英语
Scopus关键词: Critical lines
; Cyclogenesis
; Favorable conditions
; Geographic boundaries
; Oscillation phasis
; Oscillation phenomenon
; Pacific ocean
; Phase Change
; Regional variability
; Sea surface temperature (SST)
; South pacific convergence zones
; Southern Hemisphere
; Spatial variability
; Tropical cyclone
; Tropical cyclone activity
; Vertical wind shear
; Vortex tracking
; Atmospheric pressure
; Climate change
; Hurricanes
; Storms
; Nickel compounds
; climate variation
; climatology
; cyclogenesis
; El Nino-Southern Oscillation
; relative humidity
; sea surface temperature
; Southern Hemisphere
; spatial variation
; tropical cyclone
; vorticity
; wind shear
; Pacific Ocean
; Pacific Ocean (South)
英文摘要: Climatological features of tropical cyclones in the South Pacific Ocean have been analyzed based on a new archive for the Southern Hemisphere. A vortex tracking and statistics package is used to examine features such as climatological maps of system intensity and the change in intensity with time, average tropical cyclone system movement, and system density. An examination is presented of the spatial variability of these features, as well as changes in relation to phase changes of the El Niñ o-Southern Oscillation phenomenon. A critical line is defined in this study based on maps of cyclone intensity to describe the statistical geographic boundary for cyclone intensification. During El Niñ o events, the critical line shifts equatorward, while during La Niñ a events the critical line is generally displaced poleward. Regional variability in tropical cyclone activity associated with El Niñ o-Southern Oscillation phases is examined in relation to the variability of large-scale atmospheric or oceanic variables associated with tropical cyclone activity. Maps of the difference fields between different phases of El Niñ o-Southern Oscillation are examined for sea surface temperature, vertical wind shear, lower-tropospheric vorticity, and midtropospheric relative humidity. Results are also examined in relation to the South Pacific convergence zone. The common region where each of the large-scale variables showed favorable conditions for cyclogenesis coincided with the location of maximum observed cyclogenesis for El Niño events as well as for La Niñ a years. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52233
Appears in Collections: 气候变化事实与影响
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作者单位: Bureau of Meteorology, Melbourne, VIC, Australia; Monash University, Melbourne, VIC, Australia
Recommended Citation:
Dowdy A.J.,Qi L.,Jones D.,et al. Tropical cyclone climatology of the south pacific ocean and its relationship to El Niño-Southern oscillation[J]. Journal of Climate,2012-01-01,25(18)