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Diametric changes in trends and patterns of extreme rainfall over India from pre-1950 to post-1950

DSpace at IIT Bombay

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Title Diametric changes in trends and patterns of extreme rainfall over India from pre-1950 to post-1950
 
Creator VITTAL, H
KARMAKAR, S
GHOSH, S
 
Subject Rainfall Extremes
Indian Monsoon
SUMMER MONSOON
1981 CENSUS
URBANIZATION
SPELLS
 
Description Spatially aggregated extreme rainfall over India shows an increasing trend over the last 50years of the 20th century, while fine-resolution analysis reveals a spatially nonuniform trend. Analysis of 104years (1901-2004) extreme precipitation over India at 1 degrees resolution, using Extreme Value Theory, reveals that post-1950 extreme rainfall characteristics (intensity, duration, and frequency) and their trends are significantly different from those of before 1950, with spatial nonuniformity. Majority of the locations in India have post-1950 trends of extremes with a different sign as compared to pre-1950. Further investigations with statistical change point analysis reveal that fraction of grid points having post-1975 changes is maximum. Majority of the urbanized areas have post-1975 change points, while the same is not true for nonurban areas. As urbanization has intensified during 1971-1981 in India, these results indicate the possible impacts of urbanization on extreme rainfall trends and patterns.
 
Publisher AMER GEOPHYSICAL UNION
 
Date 2014-10-14T12:50:51Z
2014-10-14T12:50:51Z
2013
 
Type Article
 
Identifier GEOPHYSICAL RESEARCH LETTERS, 40(12)3253-3258
http://dx.doi.org/10.1002/grl.50631
http://dspace.library.iitb.ac.in/jspui/handle/100/14449
 
Language en