Evolution of salinity field in the upper layers of the east central Arabian Sea and northern Bay of Bengal during summer monsoon experiments |
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| Authors: | R R Rao K V Sanil Kumar |
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| Institution: | (1) Naval Physical and Oceanographic Laboratory, 682021 Cochin, India |
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| Abstract: | The intra-seasonal variability observed in the salinity field of the upper layers at a few locations in the east central Arabian
Sea and the northern Bay of Bengal during the summer monsoon seasons of 1977 and 1979 is documented with the aid of short
time series (1–2 weeks) of salinity measurements made from USSR and Indian ships deployed during MONSOON-77 (1977) and MONEX-79
(1979) field experiments. In the Arabian Sea a typical subsurface maxima observed beneath the mixed layer base either disappeared
or considerably weakened due to strong vertical mixing caused by the monsoonal forcing. In the northern Bay of Bengal the
salinity variability in the top 30 m water column was rapid and appeared to be influenced by large amounts of fresh water
from rain and probably from the major adjoining rivers. Some simple diagnostic calculations are presented to assess the relative
importance of various processes which control the observed salinity variability. |
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| Keywords: | Arabian Sea Bay of Bengal upper layers summer monsoon season salinity variability salt budget of the mixed layer |
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