Interannual Variability of the Madden-Julian Oscillations in Indian Summer Monsoon Rainfall

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  • 1 Indian Institute of Tropical Meteorology, Pune, India
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Abstract

The Madden-Julian oscillations are quite prominent over the Indian monsoon region and they are related with the large-scale active-break phases of the monsoon. These oscillations, however, show considerable inter-annual variability in period and intensity. In this study interannual variability of these oscillations has been studied by using daily rainfall data of 365 stations for 80 years (1901–80). It is found that the intensity of these oscillations is not related with the overall performance of the monsoon and the El Niño–Southern Oscillation phenomenon.

Abstract

The Madden-Julian oscillations are quite prominent over the Indian monsoon region and they are related with the large-scale active-break phases of the monsoon. These oscillations, however, show considerable inter-annual variability in period and intensity. In this study interannual variability of these oscillations has been studied by using daily rainfall data of 365 stations for 80 years (1901–80). It is found that the intensity of these oscillations is not related with the overall performance of the monsoon and the El Niño–Southern Oscillation phenomenon.

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