DOI: 10.1175/JCLI-D-12-00124.1
Scopus记录号: 2-s2.0-84874928561
论文题名: Influence of ENSO on the diurnal cycle of rainfall over the Maritime Continent and Australia
作者: Rauniyar S.P. ; Walsh K.J.E.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 4 起始页码: 1304
结束页码: 1321
语种: 英语
Scopus关键词: Dynamical fields
; Ecmwf re-analysis
; Influence of ENSO
; K-means clustering techniques
; Maritime Continent
; Positive rainfall anomalies
; Tropical rainfall measuring missions
; Walker circulation
; Rain gages
; Rain
; diurnal variation
; El Nino-Southern Oscillation
; marine atmosphere
; rainfall
; TRMM
; Walker circulation
; Australia
英文摘要: This study examines the influence of ENSO on the diurnal cycle of rainfall during boreal winter for the period 1998-2010 over the Maritime Continent (MC) and Australia using Tropical Rainfall Measuring Mission (TRMM) and reanalysis data. The diurnal cycles are composited for the ENSO cold (La Niñ a) and warm (El Nin o) phases. The k-means clustering technique is then applied to group the TRMM data into six clusters, each with a distinct diurnal cycle. Despite the alternating patterns of widespread large-scale subsidence and ascent associated with the Walker circulation, which dominates the climate over the MC during the opposing phases of ENSO, many of the islands of the MC show localized differences in rainfall anomalies that depend on the local geography and orography. While ocean regions mostly experience positive rainfall anomalies during La Niñ a, some local regions over the islands have more rainfall during El Niño. These local features are also associated with anomalies in the amplitude and characteristics of the diurnal cycle in these regions. These differences are also well depicted in large-scale dynamical fields derived from the interim ECMWF Re-Analysis (ERA-Interim). © 2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52037
Appears in Collections: 气候变化事实与影响
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作者单位: School of Earth Sciences, University of Melbourne, Melbourne, Vic., Australia
Recommended Citation:
Rauniyar S.P.,Walsh K.J.E.. Influence of ENSO on the diurnal cycle of rainfall over the Maritime Continent and Australia[J]. Journal of Climate,2013-01-01,26(4)