By
Jisha Surya - THIRUVANANTHAPURAM
23rd October 2012 11:44 AM
For the first time in the past 31 years, there was no low pressure
formation in the North Indian Ocean region in June, the first month of
the south-west monsoon season.
According to the end of the season report by the India Meteorological Department (IMD), this year was the first occasion during the period from 1981-2012, when no low pressure area formed during June. (Bay of Bengal and Arabian Sea form North Indian Ocean Region.) Development of low pressures, depressions and cyclones are crucial during the monsoon season.
South-west monsoon withdrew from the country on October 18, recording a deficient monsoon of 30 per cent in meteorological stations. The state recorded 24 per cent deficient monsoon.
“Though 10 low pressure areas were formed during the season, none intensified into a depression,” the report said. Similar situation had occurred in 2002 and 2010. Of the 10 low pressure areas formed during the season, two were in July, five in August and three in September. Five low pressure areas formed in succession during August. But no low pressure area formed during June.
During July, August and September, one low pressure area each formed over the land and the remaining low pressure areas formed over the Bay of Bengal.
A recent study by the IMD had pointed out that the number of monsoon depressions over the Arabian Sea was decreasing. This year, the Arabian Sea was devoid of low pressure formations.
Also, the North Indian Ocean was devoid of monsoon cyclones during the last five years. The last monsoon cyclone was Cyclone GONU in 2007.
Meanwhile, the IMD is yet to introspect the changing phenomenon.
According to the end of the season report by the India Meteorological Department (IMD), this year was the first occasion during the period from 1981-2012, when no low pressure area formed during June. (Bay of Bengal and Arabian Sea form North Indian Ocean Region.) Development of low pressures, depressions and cyclones are crucial during the monsoon season.
South-west monsoon withdrew from the country on October 18, recording a deficient monsoon of 30 per cent in meteorological stations. The state recorded 24 per cent deficient monsoon.
“Though 10 low pressure areas were formed during the season, none intensified into a depression,” the report said. Similar situation had occurred in 2002 and 2010. Of the 10 low pressure areas formed during the season, two were in July, five in August and three in September. Five low pressure areas formed in succession during August. But no low pressure area formed during June.
During July, August and September, one low pressure area each formed over the land and the remaining low pressure areas formed over the Bay of Bengal.
A recent study by the IMD had pointed out that the number of monsoon depressions over the Arabian Sea was decreasing. This year, the Arabian Sea was devoid of low pressure formations.
Also, the North Indian Ocean was devoid of monsoon cyclones during the last five years. The last monsoon cyclone was Cyclone GONU in 2007.
Meanwhile, the IMD is yet to introspect the changing phenomenon.
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