DOI: 10.1175/JCLI-D-13-00611.1
Scopus记录号: 2-s2.0-84899059657
论文题名: Indo-Pacific-induced wave trains during austral autumn and their effect on Australian rainfall
作者: van Rensch P. ; Cai W.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 9 起始页码: 3208
结束页码: 3221
语种: 英语
Scopus关键词: Atmospheric pressure
; Mechanical waves
; Ocean currents
; Australian rainfall
; Eastern Australia
; Indian ocean dipoles
; Pressure anomaly
; Sea surface temperature (SST)
; Southeastern tropical indian oceans
; Tropical Indian ocean
; Tropical Pacific ocean
; Rain
; autumn
; barotropic wave
; El Nino-Southern Oscillation
; rainfall
; Rossby wave
; sea surface temperature
; Australia
; Indian Ocean
; Indian Ocean (Tropical)
; Pacific Ocean
; Pacific Ocean (Tropical)
英文摘要: During austral winter and spring, the El Niño-Southern Oscillation (ENSO) and the Indian Ocean dipole (IOD), individually or in combination, induce equivalent-barotropic Rossby wave trains, affecting midlatitude Australian rainfall. In autumn, ENSO is at its annual minimum, and the IOD has usually not developed. However, there is still a strong equivalent-barotropic Rossby wave train associated with tropical Indian Ocean sea surface temperature (SST) variability, with a pressure anomaly to the south of Australia. This wave train is similar in position, but opposite in sign, to the IOD-induced wave train in winter and spring and has little effect on Australian rainfall. This study shows that the SST in the southeastern tropical Indian Ocean (SETIO) displays a high variance during austral autumn, with a strong influence on southeast and eastern Australian rainfall. However, this influence is slightly weaker than that associated with SST to the north of Australia, which shares fluctuations with SST in the SETIO region. The SST north of Australia is coherent with a convective dipole in the tropical Pacific Ocean, which is the source of a wave train to the east of Australia influencing rainfall in eastern Australia. ENSO Modoki is a contributor to the convective dipole and as a result it exerts a weak influence on eastern Australian rainfall through the connecting north Australian SST relationship. Thus, SST to the north of Australia acts as the main agent for delivering the impact of tropical Indo-Pacific variability to eastern Australia. © 2014 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51391
Appears in Collections: 气候变化事实与影响
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作者单位: Wealth from Oceans Flagship, Water for a Healthy Country Flagship, CSIRO Marine and Atmospheric Research, Aspendale, VIC, Australia
Recommended Citation:
van Rensch P.,Cai W.. Indo-Pacific-induced wave trains during austral autumn and their effect on Australian rainfall[J]. Journal of Climate,2014-01-01,27(9)