Trends in seasonal temperatures over the Indian region
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An investigation has been carried out to identify the trends in maximum, minimum and mean temperatures and temperature range over the Indian land mass during the winter (January, and February), pre-monsoon (March–May), southwest monsoon (June–September) and post-monsoon (October–December) seasons by using high resolution daily gridded data set prepared by India Meteorological Department for the period of 1969–2005. It has been observed that the maximum temperatures over the west coast of India show rising trend in winter, southwest monsoon and post-monsoon seasons but the maximum temperatures do not show any significant trend over the other parts of the country. Minimum temperatures show increasing trend over the North Indian states in all seasons and they show an increasing trend over the west coast of India in winter and southwest monsoon seasons. Mean temperature shows an increasing trend over the west coast of India during winter and southwest monsoon seasons. Decreasing trend is observed in the temperature range over North India in all seasons due to increasing trend in minimum temperature.
KeywordsTemperature temperature range trend analysis India seasonal trend.
The authors are thankful to University Grants Commission, India for funding this research work and Department of Atmospheric and Space Sciences, University of Pune and Sir Parashurambhau College, Pune for providing the facilities for the work. The authors are also thankful to India Meteorological Department for making the data available for this research work. They thank Dr Anandakumar Karipot and Dr Makarand Kulkarni for their continuous encouragement and help for the research work. They also thank the anonymous reviewer for valuable comments which have led to vast improvement of the paper.
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