Global annual mean surface air temperature anomalies and their link with Indian summer monsoon failures |
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| Authors: | S. S. Dugam S. B. Kakade R. K. Verma |
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| Affiliation: | Indian Institute of Tropical Meteorology, Pune-411005, India,Indian Institute of Tropical Meteorology, Pune-411005, India,Indian Institute of Tropical Meteorology, Pune-411005, India |
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| Abstract: | Analysis of the global mean annual temperature anomalies based on land and marine data for the last 88 years (1901-1988) of this century has been carried out with a view to find any relationship with failures in Indian summer monsoon rainfall. On the climatological scale (i.e. 30 years) it has been noticed that there is as abnormal increase in the frequency of drought years during epochs of global warming and cooling, while it is considerably less when global temperatures are near normal. Results are unchanged even when the data are filtered out for ENSO (El-Nino South-ern Oscillation) effect.It has also been noticed that during warm and cold epochs in global temperatures the amount of summer mon-soon rainfall decreases as compared to the rainfall during a normal temperature epoch. |
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