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Hydroclimatic changes in a climate-sensitive tropical region

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Title Hydroclimatic changes in a climate-sensitive tropical region
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Creator Dileep K. Panda
A. Kumar
R. B. Singandhupe
N. Sahoo
 
Subject hydroclimatic variables
cyclonic disturbances
Bay of Bengal
anthropogenic activity
nonparametric test
 
Description Not Available
In this study, the hydroclimatic variables of Orissa, a tropical region in eastern India, and the cyclonic disturbances over the Bay of Bengal were analysed to assess trends and variations using nonparametric statistical procedures. The trend results revealed pronounced warming pattern in the monthly maximum temperatures and cooling pattern in the monthly minimum temperatures for the period 1987–2001. The differential forcing mechanisms of greenhouse gases and aerosols were considered as a reason for the temperature extremes. For the period 1960–2003, significant upward shift was observed in June rainfall, particularly over the region where orography influences the rainfall. This study provides strong evidence suggesting the occurrence of abrupt shifts in the cyclonic disturbances over the Bay of Bengal. For the period
1901–2003, the monsoon depressions and cyclonic storms, which contribute a substantial amount of rainfall in Orissa and central India, exhibited significant downward abrupt shifts during 1971 and 1950, respectively. However, severe cyclonic storms in the post-monsoon season showed significant upward shift during the 1961–1965 pentad. More cases of non-significant decreasing trends were observed in the monsoon rainfall for the period 1980–2003 in spite of high inter-annual variability. These trends may be attributed to the significant downward shift in the monsoon depression from 1983 onwards analysed for the period 1960–2003. Results also show that the observed trends are highly sensitive to the season of analysis and the period of records.
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Date 2018-07-23T09:47:06Z
2018-07-23T09:47:06Z
2012-06-18
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/6287
 
Language English
 
Relation Not Available;
 
Publisher Wiley-Blackwell on behalf of the Royal Meteorological Society