Title: Characterisation of spatio-temporal trend in temperature extremes for environmental decision making in Bangladesh

Authors: Md. Mohsan Khudri; Md. Shaddam Hossain Bagmar; Asef Mohammad Redwan

Addresses: Fogelman College of Business and Economics, The University of Memphis, USA ' Department of Mathematics and Statistics, University of Calgary, Canada; Institute of Statistical Research and Training (ISRT), University of Dhaka, Dhaka-1000, Bangladesh ' Department of Civil, Environmental and Construction Engineering, Texas Tech University, USA

Abstract: Spatial and sequential variability of extreme temperature events enthral the scientific community owing to their significant impact on global climate change. This study analysed trends in monthly data of temperature extremes of 23 meteorological stations of Bangladesh using Mann-Kendall test. Most of the stations showed significant increasing trend for both temperature extremes on monthly and annual scales. Most of the change points were detected during the last four decades and showed an upward trend. The results obtained from Sen's estimator vouchsafed that magnitudes of trend ranged from 0.007°C to 0.034°C per year and 0.014°C to 0.049°C per year for minimum and maximum temperature, respectively. The upward trend in both extreme temperatures pointed to global warming. The maximum number of significant trends was observed in monsoon and post-monsoon seasons for average maximum temperature. The upward trend in the monsoon and post-monsoon season may cause the drought and late winter in Bangladesh.

Keywords: temperature; climate change; trend analysis; environment; Bangladesh.

DOI: 10.1504/IJGW.2019.104269

International Journal of Global Warming, 2019 Vol.19 No.4, pp.364 - 381

Received: 05 Jan 2019
Accepted: 05 Aug 2019

Published online: 19 Dec 2019 *

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