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Diurnal and spatial variation of Indian summer monsoon rainfall using tropical rainfall measuring mission rain rate

Varikoden, H and Preethi, B and Revadekar, JV (2012) Diurnal and spatial variation of Indian summer monsoon rainfall using tropical rainfall measuring mission rain rate. Journal of Hydrology, 475. pp. 248-258.

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Abstract

This paper deals with the diurnal and spatial variation of summer monsoon (JJAS) rainfall, extremes and its frequency for a period of 12. years using the TRMM (Tropical Rainfall Measuring Mission) rain rate data set. Rainfall and frequency of rain events are more observed over the western coastal belts, northeastern regions, foothills of Himalayas and Bay of Bengal regions. Average seasonal rainfall is about 400. mm from 150. rainy hours. The rainfall amount and frequency of rain events show a peak at 1730 IST over Central India, 0230 IST over the foothills of Himalayas and 0830 IST over the north Bay of Bengal. Rainfall over the west coast is more evenly distributed throughout the day. Diurnal pattern of rain intensity is different than that of the rainfall, it is more over the Gujarat regions and peak is observed at 1730 IST and 0230 IST. The relative contribution of rainfall by each octet towards the seasonal total is different. Contribution of rainfall towards its seasonal is maximum at 1730 IST over the main land and is different over other regions. In addition to this, the diurnal pattern of high intensity (90th percentile and above) and low intensity (10th percentile and below) rainfall during the season were also analyzed to find out their spatial distribution. We found that the diurnal pattern is more prominent for the high intensity rainfall than that for the low rainfall intensity. Maximum rainfall hours show systematic southward propagation from early morning to late night.

Item Type: Article
Additional Information: Copyright of this article belongs to Elsevier.
Uncontrolled Keywords: Bay of Bengal; Central India; Data sets; Diurnal pattern; Frequency; High intensity; High intensity rainfall; Himalayas; Indian summer monsoon rainfall; Intensity; Low-intensity; Rain events; Rain rates; Rain-intensity; Rainfall intensity; Rainy hours; Relative contribution; Seasonal rainfall; Spatial variations; Summer monsoon; Summer monsoon rainfall; Tropical rainfall measuring missions; West coast, Atmospheric thermodynamics; Rain gages, Rain, belt; data set; monsoon; precipitation intensity; rainfall; spatial distribution; summer; temporal variation; tropical environment, Bay of Bengal; Himalayas; Indian Ocean
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 10 Jun 2014 07:14
Last Modified: 10 Jun 2014 07:14
URI: http://moeseprints.incois.gov.in/id/eprint/412

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