Abstract
Surface and upper air synoptic features prevailing at the time of onset of southwest monsoon over Mumbai have been examined for a period of 50 years from 1947 to 1996. These synoptic situations have been found to fall under three broad categories. The study shows that on about 66% of the occasions, the onset of monsoon over Mumbai is caused by low pressure area forming over southeast and east central Arabian Sea as they move northwards, while on 28% of the occasions, the onset is due to the low pressure systems forming over northwest/head Bay of Bengal and their movement towards northwest/west northwest. Based on the findings of the study and the climatological aspects, a criterion for declaring onset over Mumbai has been suggested.
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Kumar, S., Prasad, T. & Agrawal, A.L. A synoptic-climatic study of the onset of southwest monsoon over Mumbai. Proc. Indian Acad. Sci. (Earth Planet Sci.) 108, 321–326 (1999). https://doi.org/10.1007/BF02840511
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DOI: https://doi.org/10.1007/BF02840511