Diametric changes in trends and patterns of extreme rainfall over India from pre-1950 to post-1950
作者： Hersha Vittal , Subhankar Karmakar , Subimal Ghosh , None
DOI: 10.1002/GRL.50631
关键词: Geography 、 Urbanization 、 Precipitation 、 Climatology 、 Monsoon of South Asia 、 Change points 、 Extreme value theory 、 Change-Point Analysis
摘要: [1] Spatially aggregated extreme rainfall over India shows an increasing trend the last 50 years of 20th century, while fine-resolution analysis reveals a spatially nonuniform trend. Analysis 104 years (1901–2004) precipitation at 1° resolution, using Extreme Value Theory, that post-1950 characteristics (intensity, duration, and frequency) their trends are significantly different from those before 1950, with spatial nonuniformity. Majority locations in have extremes sign as compared to pre-1950. Further investigations statistical change point reveal fraction grid points having post-1975 changes is maximum. urbanized areas points, same not true for nonurban areas. As urbanization has intensified during 1971–1981 India, these results indicate possible impacts on patterns.
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