Spatio-temporal Trend Determination of Temperature and Rainfall for Climate Change and Variability in Assam State, India

Article type: Research Article

Authors: Begum, Asfika^a | Mahanta, Ratul^{b; *}

Affiliations: [a] Department of Economics, DKD College, Dergaon – 785614, Assam, India | [b] Department of Economics, Gauhati University, Assam, India

Correspondence: [*] Corresponding Author. rmeco@gauhati.ac.in

Abstract: The effect of climate change differs significantly from region to region and it becomes pertinent to ascertain whether the characteristics of major components such as temperature and rainfall have been changing on the regional scale too. In this context, the present study mainly aims to investigate whether there are spatio-temporal changes in temperature and rainfall in Assam and if so, to what extent these changes have been happening. Both parametric and non-parametric methods have been used to study climate change and variability. The study finds that there is a significant increase in annual minimum temperature than the annual maximum temperature in Assam. The fluctuations in annual minimum temperature as shown by the coefficient of variation are also more than the annual maximum temperature. Though the rainfall trend is not significant, the decreasing trend of rainfall in most of the stations during the monsoon season prevails in Assam.

Keywords: Climate change, Mann Kendall test, Mann Whitney test, Serial correlation

DOI: 10.3233/JCC220004

Journal: Journal of Climate Change, vol. 8, no. 1, pp. 45-58, 2022