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a
b
3 ı
3 ı region
Fig. 26.11
Vertical profiles of the 60 h time averaged and area averaged over a
around the centre of the depression for the ( a ) apparent heat source
.
Q 1 /
( b ) apparent moisture
sink
.
Q 2 /
for the 19-22 September 2006 depression
Earlier studies ( Schlesinger 1994 ) showed that the heating due to apparent moisture
sink has a minimum at about 9 km
D 0:225/
with the maximum peak observed
at about 3 km
. The relative absence of a pronounced maximum peak
associated with the apparent moisture sink is well captured in all the four model
experiments.
D 0:725/
26.4.2
Monsoon Depression That Formed During 02 to 05
September 2006
The depression which formed over the north Bay of Bengal during the first week
of September 2006 was first seen as a low pressure area over the same region in
the morning. The system became well marked in the forenoon and subsequently
intensified into a depression and lay centered about 180 km southeast of Balasore,
Orissa at 12 UTC on 03 September 2006. Moving in a north-westerly direction, the
depression crossed the Orissa coast close to Chandbali at 12 UTC on 04 September
2006. Furthermore, the system moved north-westwards and weakened into a well
marked low pressure area over north Chhattisgarh and adjoining east Madhya
Pradesh on 5 September 2006.
 
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