Title: Spatio-temporal patterns of rainfall variability in Bangladesh

Authors: Lipon Chandra Das; Zhihua Zhang; M. James C. Crabbe; Anxin Liu

Addresses: Climate Modeling Laboratory, School of Mathematics, Shandong University, Jinan, China; Department of Mathematics, University of Chittagong, Bangladesh ' Climate Modeling Laboratory, School of Mathematics, Shandong University, Jinan, China ' Wolfson College, Oxford University, Oxford, UK ' Climate Modeling Laboratory, School of Mathematics, Shandong University, Jinan, China

Abstract: Bangladesh is experiencing a more rapid warming trend compared to the global average, facing significant climate-related risks. This study gave a comprehensive assessment of rainfall variability across the whole Bangladesh during 1989-2022. Annual rainfall in Bangladesh exhibited significant decreasing trends and high oscillation patterns. The multi-scale SPI and SPEI analysis revealed that Bangladesh experienced severe droughts in 1995, 1999, 2018, 2021 and 2022. The DFA revealed that rainfall evolution exhibited significant long-term positive correlation in almost Bangladesh. These results will support policymakers in Bangladesh to develop suitable strategies in mitigating climate change impacts.

Keywords: rainfall variability; pattern analysis; inter-annual oscillations; drought evolution; long-range correlation; Bangladesh.

DOI: 10.1504/IJGW.2024.138447

International Journal of Global Warming, 2024 Vol.33 No.2, pp.206 - 221

Received: 31 Dec 2023
Accepted: 10 Feb 2024
Published online: 03 May 2024 *

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