Analysis of temperature variability over north-west part of India for the period 1970-2000

作者：Punia Monika^*; Nain Suman; Kumar Amit; Singh Bhupendra Pratap; Prakash Amit; Kumar Krishan; Jain V K

来源：Natural Hazards, 2015, 75(1): 935-952.

DOI：10.1007/s11069-014-1352-8

• DTR
• Trend analysis
• Annual and seasonal scale
• CAM
• Correlation

The main aim of this study was to investigate the temporal trends in maximum (T-max), minimum (T-min) temperature and diurnal temperature range (DTR) at annual and seasonal basis for seven sites in north-west region of India. The analysis was carried out for period of 31 years (1970-2000). The magnitude of trends and their significance were determined using Sen's slope and Mann-Kendall methods. Additionally, persistence analysis of annual average DTR and mean temperature (T-mean) has been carried out using cumulative annual mean (CAM) method. It is clear from the results that during last three decades the majority of sites showed decrease/(increases) in DTR/(T-min) trends for seasonal and annual time scale. While, trends in annual and seasonal T-max were observed insignificant. CAM analysis demonstrated that T-mean has increased consistently since 1987-1988 onwards at majority of the sites. Further, correlation analysis revealed that rainfall along with potential evapotranspiration may be one of the important reasons for observed DTR decrease.

• 出版日期2015-1