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Low-latitude volcanic eruptions and their effects on Sri Lanka rainfall during the north-east Monsoon.

Mukherjee, BK and Indira, K and Dani, KK (1987) Low-latitude volcanic eruptions and their effects on Sri Lanka rainfall during the north-east Monsoon. Journal of Climatology, 7 (2). pp. 145-155.

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Abstract

The rainfall at 15 meteorological stations in Sri Lanka and the low latitude (20oN to 20oS) volcanoes, having volcanic explosivity index (VEI) 4 or more, for a period of 112 years (1869-1980), are investigated to examine the effects of the eruptions on the rainfall activity over Sri Lanka during the north-east monsoon season (November and December). The study has suggested deficient rainfall in 14 out of 15 Sri Lankan stations during both the first and the first two successive north-east monsoon seasons, which followed 53 to 80 of volcanic eruption years. Occurrence of deficient rainfall to the north of the inter tropical convergence zone (ITCZ) over Sri Lanka after the eruptions of the low-latitude volcanoes could be attributed to the southward shift of the ITCZ due to depletion of the solar radiation caused by the aerosols released in the stratosphere by the strong volcanic eruptions.

Item Type: Article
Additional Information: Copyright of this article belongs to Royal Meteorological Society
Uncontrolled Keywords: equatorial rainfall; low latitude volcanic eruptions
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 02 May 2015 09:27
Last Modified: 02 May 2015 09:27
URI: http://moeseprints.incois.gov.in/id/eprint/1190

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