111-122The understanding of significant changes in the
oceanic mixed layer is important for dynamical prediction of tropical cyclone.
Present study aims at examining the variations in the upper ocean parameters
during the movement of tropical
cyclone in northern and southern Indian
Ocean, by applying 1½ layer wind driven reduced gravity
ocean model. Different idealized tracks in the Bay of
Bengal and their mirror images in southern hemisphere are
considered, The model produced mixed layer depth, temperature and currents are
compared for northern and southern hemispheric cyclone cases. Also the effect
of latitude for westward moving cyclones in both the hemisphere is
investigated. For this, tracks in the Arabian Sea
and their counter parts in the southern hemisphere
are considered. The maximum cooling found in the wake of cyclone is of the
order of 3 - 4°C, which is comparable with earlier studies and observations.
This significant cooling can cause weakening of the storm. This can be useful
for prediction especially in the event of a cyclonic storm heading towards land
and likely to make land fall. Moreover it is also seen that the mixed layer is
cooled more on the right (left) of the storm track in northern (southern)
hemisphere. This cooling decreases for the storms translating along higher
latitudes implying the sensitivity of the latitudinal location of the storm.
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