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Development of summer monsoon and onset of continuous rains over central west coast of India

DRS at CSIR-National Institute of Oceanography

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Title Development of summer monsoon and onset of continuous rains over central west coast of India
 
Creator Varkey, M.J.
 
Description A new interpretation of the start of summer monsoon along central west coast of India is presented in this paper. Many authors misinterpret onset of continuous rains as start of summer monsoon front, These two are different phenomena, continuous rains happening during the last phase of monsoon development as a consequence of and after (2-5 weeks) the establishment of monsoon circulation or monsoon front. Summer monsoon front, as the term 'monsoon' originally meant, is to be delineated from the patterns of winds at surface and upto about 2 km height (observable from cloud movements) and becomes established during the first week (approximately) of May at Panjim (15 degrees 29 minutes N and 73 degrees 49 minutes E), a coastal station, which can be considered representative for a long coastal belt, west of Western Ghats, called here the central west coast of India. Before the establishment of summer monsoon front at Panjim, establishment of thermal front, humidity front and cloud front happen indicating start of hot and humid summer by about mid-April. Intensification of Indo-Pak Low and easterly upper tropospheric jet happen during May-June only (onset period for rain front also), two prerequisites for continuous rains. Day to day variations of surface temperatures, surface winds, humidities, clouds, upper winds and rainfalls are studied for the years 2000 and 1995 (year of earliest onset in a century and a delayed onset, respectively) to bring out patterns of change during progression of seasons. Similar situations can exist in other regions of the Asian Summer Monsoon sector with some differences
 
Date 2008-02-22T06:39:47Z
2008-02-22T06:39:47Z
2005
 
Type Conference Article
 
Identifier Proceedings of National Symposium on Half A Century Progress in Oceanographic studies of North Indian Ocean since Prof. La Fond's Contributions (HACPO), ed. by: Prasad, K.V.S.R. 38-45p.
http://drs.nio.org/drs/handle/2264/1022
 
Language en
 
Rights Copyright [2005]. It is tried to respect the rights of the copyright holders to the best of the knowledge. If it is brought to our notice by copyright holder that the rights are voilated then the item would be withdrawn.
 
Publisher Andhra University