DOI: 10.1007/s00382-013-1765-1
Scopus记录号: 2-s2.0-84894379736
论文题名: Indian Ocean dipole interpreted in terms of recharge oscillator theory
作者: McPhaden M.J. ; Nagura M.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 42, 期: 2017-05-06 起始页码: 1569
结束页码: 1586
语种: 英语
英文摘要: In this paper we use sea surface height (SSH) derived from satellite altimetry and an analytical linear equatorial wave model to interpret the evolution of the Indian Ocean Dipole (IOD) in the framework of recharge oscillator theory. The specific question we address is whether heat content in the equatorial band, for which SSH is a proxy, is a predictor of IOD development as it is for El Niño and the Southern Oscillation (ENSO) in the Pacific. We find that, as in the Pacific, there are zonally coherent changes in heat content along the equator prior to the onset of IOD events. These changes in heat content are modulated by wind-forced westward propagating Rossby waves in the latitude band 5°-10°S, which at the western boundary reflect into Kelvin waves trapped to the equator. The biennial character of the IOD is affected by this cycling of wave energy between 5° and 10°S and the equator. Heat content changes are a weaker leading indicator of IOD sea surface temperature anomaly development than is the case for ENSO in the Pacific though because other factors are at work in generating IOD variability, one of which is ENSO forcing itself through changes in the Walker Circulation. © 2013 Springer-Verlag (outside the USA). 资助项目: NOAA, National Oceanic and Atmospheric Administration
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54263
Appears in Collections: 过去全球变化的重建
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作者单位: Pacific Marine Environmental Laboratory, NOAA, Seattle, WA, 98115, United States; Application Laboratory, Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan
Recommended Citation:
McPhaden M.J.,Nagura M.. Indian Ocean dipole interpreted in terms of recharge oscillator theory[J]. Climate Dynamics,2014-01-01,42(2017-05-06)