Influence of the Indian Ocean Dipole on the Southern Oscillation
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概要
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The influence of the Indian Ocean Dipole (IOD) on the interannual atmospheric pressure variability of the Indo-Pacific sector is investigated. Statistical correlation between the IOD index and the global sea level pressure anomalies demonstrates that loadings of opposite polarity occupy the western and the eastern parts of the Indian Ocean. The area of positive correlation coefficient in the eastern part even extends to the Australian region, and the IOD index has a peak correlation coefficient of about 0.4 with the Darwin pressure index, i.e. the western pole of the Southern Oscillation, when the former leads the latter by one month. The correlation analysis with seasonally stratified data further confirms the lead role of the IOD. The lOD-Darwin relation has undergone interdecadal changes ; in the last 50 years the correlation is highest during the most recent decade of 1990-99, and weakest during 1980-89.a
- 社団法人日本気象学会の論文
- 2003-02-25
著者
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Yamagata Toshio
Institute For Global Change Research:nanjing Institute Of Meteorology
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Behera Swadhin
Institute For Global Change Research Frontier Research System For Global Change
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Yamagata T
Institute For Global Change Research:nanjing Institute Of Meteorology
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Yamagata Toshio
Institute For Global Change Research
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- THE INTERACTION BETWEEN THE ENSO AND THE INDIAN OCEAN DIPOLE EVENTS : IMPACT ON THE INDIAN SUMMER CLIMATE
- THE TROPICAL ATMOSPHERIC RESPONSE TO THE 1994 INDIAN OCEAN DIPOLE EVENT : AN AGCM STUDY