Long-term temperature trends in maximum, minimum and mean temperature at 56 major cities of India are analyzed. Observed rates of change in temperature at annual and seasonal scales at all the cities along with the locational attribute i.e. latitudes and longitudes were subjected to cluster analysis. Ten distinct clusters were identified which depict spatial variations in the rates of change of temperature. Annual TM (mean temperature) is increasing over Southern Peninsula, particularly due to higher and significant rise in TMAX (maximum temperature) also associated with increase in TMIN (minimum temperature) at some cities. Over West Peninsula-South cluster the observed warming is wholly driven by an increase in TMIN (rates between 0.15 and 0.30ºC/decade). Over Lower Gangetic Plain annual TMIN is decreasing at most of the cities. In general it is observed that the southern parts of the country are warming with higher rates. On seasonal scale the rates of warming are higher during post-monsoon at majority of the locations. The effect of urbanization is also assessed and the results revealed that ever increasing urbanization has led to increase in temperature. On the contrary, few cities have experienced cooling in spite of urbanization. This cooling may be related to variations in other weather parameters, for example, rainfall or to the increasing aerosols over the cities.
|Keywords:||Urbanization, Climate Change, Less Urbanized Period, More Urbanized Period, Power demand|
Lecturer, Department of Geography, University of Pune, Pune, Maharashtra, India
Lecturer, Department of Geography, Nowrosjee Wadia College, Nowrosjee Wadia College, Pune, Maharashtra, India
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