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Abnormal modulation of atmospheric parameters during the tsunami of 2004

Vishnu, R and Varikoden, H and Kumar, VA and Das, SM and Kumar, GM and Symon, VNS (2012) Abnormal modulation of atmospheric parameters during the tsunami of 2004. Current Science, 102 (11). pp. 1575-596.

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This paper discusses the abnormal changes in weather elements observed at a tropical mountain location and a coastal station in India. Abnormal changes were noticed in the atmospheric parameters at a time close to the occurrence of tsunami on the Indian coasts due to high magnitude earthquakes in the Sumatra region on 26 December 2004. Close to the time of this earthquake occurrence, uncharacteristic and large magnitude changes in weather elements were recorded at Braemore (8o45â²N, 77o05â²E, 360 m amsl), a mountain field station at Western Ghats. Abnormal changes were also recorded at Minambakkam (13oN, 80o18â²E, 16 m SLP), close to eastern coastal belts. In the Braemore field station, simultaneous changes were observed in the atmospheric parameters; decrease in pressure by 0.6 hPa, increase in relative humidity by 30 and a prominent reduction in air temperature by more than 3oC on the day of tsunami. Also, unusually the relative humidity did not reach 100 on the previous night. However, in the Minambakkam station, the relative humidity increased by 10 associated with a sharp decrease in temperature by about 2.5oC. The changes in both the stations occurred almost at the same time and duration. Therefore, it may be concluded that these changes are associated with the high magnitude earthquake and subsequent tsunami.

Item Type: Article
Additional Information: Copyright of this article belongs to Indian Academy of Sciences.
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 04 Jan 2014 17:47
Last Modified: 04 Jan 2014 17:47

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