Trend Assessment in Climatic Variables  by Mann Kendall and t–test: A Case Study  of Yavatmal District in Vidarbha, India

D. T. Deshmukh; H. S. Lunge

Volume : II, Issue : V, May - 2013

Trend Assessment in Climatic Variables by Mann Kendall and t–test: A Case Study of Yavatmal District in Vidarbha, India

D. T. Deshmukh, H. S. Lunge

Abstract :

There is a growing concern about global warming day by day as it affects climatic variables on planet earth. The main objective of the present research paper is to examine trends in rainfall and temperature of Yavatmal district in Vidarbha. The trends of maximum atmospheric temperature, rainfall and rainy days are analysed statistically for meteorological data of Yavatmal district in Vidarbha, over last three decades stretching between years 1975 to 2005. The long term change in temperature, rainfall and rainy days has been analysed by correlation and linear trend analysis. The decreasing trend is observed in mean of maximum (MMAX) temperature, rainy days (RD) and rainy days (RD J–S) during season June to September and is confirmed by Mann–Kendall trend test whereas very weak increasing trend is observed in total month rainfall (TMRF) and total month rainfall (TMRF J–S) during season June to September. Summary: The Yavatmal district is one of the distressed districts due to farmer�s suicides in Vidarbha, Maharashtra. Maximum temperature, rainfall and rainy days data during period 1975 to 2005 obtained from Indian Meteorological Department (IMD), Pune were analysed. It is observed that MMAX temperature, RD, RD (J–S) shows decreasing trend and TMRF and TMRF (J–S) observed weak increasing trend in Yavatmal district.