Monsoon rainfall extreme indices and tendencies from 1954–2003 in Kerala, India
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Climate change has the potential ability to alter the occurrence and severity of extreme events. Though predicting changes of such extreme events is difficult, understanding them is important to determine the impacts of climate change in various sectors. This paper presents the change in rainfall extremes in the monsoon season in south-west Indian peninsula. Daily rainfall data were analysed for the entire Kerala state in India to determine if the extreme rainfall had changed over the 50-year period. Several indices were derived from the data to identify the extreme rainfalls. The trends of all the extreme indices were assessed by parametric ordinary least square regression technique, which were tested for significance at 95% level. Results showed significant decrease in monsoon rainfall extremes in Kerala that would affect the tendency of change in seasonal total rainfall. This study provides a comprehensive knowledge on extreme monsoon precipitation in Kerala, which could also be employed to study changing climate at local scale in other regions.
KeywordsMonsoon Season Monsoon Rainfall Extreme Precipitation Extreme Rainfall Extreme Index
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- Bardossy A, Hundecha Y (2003) Trends of extreme precipitation and temperature associated climatic conditions in the German part of the Rhine basin from 1958–2001. Contribution to STARDEX D9Google Scholar
- Cruz RV, Harasawa H, Lal M, Wu S, Anokhin Y, Punsalmaa B, Honda Y, Jafari M, Li C, Huu Ninh N (2007) Asia Climate Change 2007: impacts, adaptation and vulnerability. In: Parry ML, Canziani OF, Palutikof JP, van der Linden PJ, Hanson CE (eds) Fourth assessment report of the intergovernmental panel on climate change. Cambridge University Press, Cambridge, pp 469–506Google Scholar
- De US, Dube RK, Prakasa Rao GS (2005) Extreme weather events over India in the last 100 years. J Indian Geophys Union 9(3):173–187Google Scholar
- Joshi UR, Rajeevan M (2006) Trends in precipitation extremes over India. National Climate Center Research Report 3, October 2006, India Meteorological Department, PuneGoogle Scholar
- Peterson TC (2005) Climate change indices. WMO Bull 54(2):83–86Google Scholar
- Rajeevan M, Bhate J, Kale JD, Lal B (2005) Development of a high resolution daily gridded rainfall data for the Indian region. Indian Meteorological Department, Met. Monograph Climatology No. 22/2005, p 26Google Scholar
- Rajeevan M, Bhate J, Kale JD, Lal B (2006) A high resolution daily gridded rainfall for the Indian region: analysis of break and active monsoon spells. Curr Sci 91(3):296–306Google Scholar
- Soman MK, Krishna Kumar K, Singh N (1988) Decreasing trend in the rainfall of Kerala. Curr Sci 57(1):7–12Google Scholar