DOI: 10.1175/JCLI-D-13-00130.1
Scopus记录号: 2-s2.0-84901823569
论文题名: The varied impacts of El Niño-southern oscillation on pacific Island climates
作者: Murphy B.F. ; Power S.B. ; Mcgree S.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 11 起始页码: 4015
结束页码: 4036
语种: 英语
Scopus关键词: Atmospheric pressure
; Convergence zones
; Equatorial Pacific
; Interannual climate variability
; Intertropical convergence zone
; Normal condition
; Rainfall patterns
; Sea surface temperature anomalies
; South pacific convergence zones
; Rain
; annual variation
; El Nino-Southern Oscillation
; intertropical convergence zone
; rainfall
; sea surface temperature
; surface wind
; warm pool
; Pacific islands
; Pacific Ocean
英文摘要: El Niño-Southern Oscillation (ENSO) drives interannual climate variability in many tropical Pacific island countries, but different El Niño events might be expected to produce varying rainfall impacts. To investigate these possible variations, El Niño events were divided into three categories based on where the largest September-February sea surface temperature (SST) anomalies occur: warm pool El Niño (WPE), cold tongue El Niño (CTE), and mixed El Niño (ME), between the other two. Large-scale SST and wind patterns for each type of El Niño show distinct and significant differences, as well as shifts in rainfall patterns in the main convergence zones. As a result, November to April rainfall in many Pacific island countries is significantly different among the El Niño types. In western equatorial Pacific islands, CTE events are associated with drier than normal conditions whereas ME and WPE events are associated with significantly wetter than normal conditions. This is due to the South Pacific convergence zone and intertropical convergence zone moving equatorward and merging in CTE events. Rainfall in the convergence zones is enhanced during ME and WPE and the displacement is smaller. La Niña events also show robust impacts that most closely mirror those of ME events. In the northwest and southwest Pacific strong CTE events have much larger impacts on rainfall than ME and WPE, as SST anomalies and correspondingly large-scale surface wind and rainfall changes are largest in CTE. While variations in rainfall exist between different types of El Niño and the significant impacts on Pacific countries of each event are different, the two extreme CTE events have produced the most atypical impacts. © 2014 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51066
Appears in Collections: 气候变化事实与影响
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作者单位: Centre for Australian Weather and Climate Research, Bureau of Meteorology, Melbourne VIC, Australia; National Climate Centre, Bureau of Meteorology, Melbourne, VIC, Australia
Recommended Citation:
Murphy B.F.,Power S.B.,Mcgree S.. The varied impacts of El Niño-southern oscillation on pacific Island climates[J]. Journal of Climate,2014-01-01,27(11)