Variability of wind stress and wind stress curl over the north Indian Ocean during pre-monsoon and monsoon seasons of 1987 and 1988

O.P. Singh

Abstract



The computations of wind stress and wind stress curl over the north Indian Ocean have been made for pre-monsoon and monsoon seasons of the years 1987 and 1988 utilising all real-time and non real-time ship observations. During 1987 there was a major monsoon failure (June-September rainfall departure: -19%) whereas 1988 was an extremely good monsoon year (departure: +19%). In general, higher negative values of stress curl over the central and adjoining southern Arabian Sea and higher positive values over the Bay of Bengal are found during the period May-September of 1988 compared to the values during 1987. The magnitudes of wind stress are found to be higher over the southern Bay of Bengal during May, 1988 as compared to those of May, 1987 whereas over the northern Bay of Bengal higher values prevailed during May, 1987

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