Active and break spells of the Indian summer monsoon |
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| Authors: | M Rajeevan Sulochana Gadgil Jyoti Bhate |
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| Institution: | (1) Indian Institute of Tropical Meteorology, Pashan, Pune, 411 008, India |
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| Abstract: | In this paper, we suggest criteria for the identification of active and break events of the Indian summer monsoon on the basis
of recently derived high resolution daily gridded rainfall dataset over India (1951–2007). Active and break events are defined
as periods during the peak monsoon months of July and August, in which the normalized anomaly of the rainfall over a critical
area, called the monsoon core zone exceeds 1 or is less than −1.0 respectively, provided the criterion is satisfied for at
least three consecutive days. We elucidate the major features of these events. We consider very briefly the relationship of
the intraseasonal fluctuations between these events and the interannual variation of the summer monsoon rainfall. |
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