Abstract

The historical records of temperature for Aji river basin (Dist. Rajkot) were collected and the monthly seasonal and annual average of daily maximum, minimum and mean temperature were computed for 32 years (1978–2009). The each time series data of temperature were analyzed for the warming trend analysis and based on that the future scenario of climate was projected. Monthly average of maximum temperature was found decreasing, increasing and no significant during 3, 3 and 6 months, respectively, in a year. While that of minimum temperature indicated significantly decreasing trend in 12 months in a year. In fact, the monthly average of daily mean temperature was found decreased in 11 months and insignificant decreasing trend in 1 month. The seasonal average of maximum temperature showed decreasing trend during monsoon and winter and increasing trend in summer season. However, the highly significant decreasing trend in seasonal average minimum temperature was observed during all of three seasons of the year. Seasonal average of dailymean temperature was found in decreasing trend during winter, summer and monsoon. Annual average of daily minimum and meantemperature could be found significantly decreasing by 0.28°C and 0.15°C per year, whereas maximum temperature was found stable. This indicates that there will not be climate change in this region due to warming if the same temperature trend will continue.