Evidence of Long-term Climate Change at Major Cities of India during the Twentieth Century

By Amit Dhorde and Anargha Wakhare.

Published by The International Journal of Climate Change: Impacts and Responses

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Article: Print $US10.00
Article: Electronic $US5.00

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

The International Journal of Climate Change: Impacts and Responses, Volume 1, Issue 3, pp.15-42. Article: Print (Spiral Bound). Article: Electronic (PDF File; 2.730MB).

Dr. Amit Dhorde

Lecturer, Department of Geography, University of Pune, Pune, Maharashtra, India

My field of specialization is Climatology. I have done my masters and Ph.D. from the Department of Geography, University of Pune. I am interested in working on investigation of climatic trends, agroclimatology and human impacts on the environment. My doctoral research was on ‘Long-term trends of selected weather parameters at major cities of India’. My work is based on instrumental records, but I would also like to investigate climate change using proxies. My other fields of interests include use of Geographical Information Systems to understand climatic trends in a better way. I also work on extraction of land surface temperature using remotely sensed data. I have used remote sensing data to find spatio-temporal variations in urban heat island. Since 2001, I have been working as a lecturer in the Department of Geography, University of Pune.

Dr. Anargha Wakhare

Lecturer, Department of Geography, Nowrosjee Wadia College, Nowrosjee Wadia College, Pune, Maharashtra, India

I am a Geomorphologist and work in field of Coastal Geomorphology. I have done my masters and my doctoral research from Department of Geography, University of Pune. My interest area in research is basically in coastal geomorphology along with urban hydrology and applications of remote sensing and GIS techniques. I have completed one major research project on extraction of land surface temperature for pune city using remotely sensed data.

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