Staff View: Recent changes in temperature extremes in subtropical climate region and the role of large-scale atmospheric oscillation patterns

Recent changes in temperature extremes in subtropical climate region and the role of large-scale atmospheric oscillation patterns

Understanding the recent variations in temperature extremes is crucial to anticipate the forthcoming incidences of extreme phenomena. However, knowledge of temperature extremes’ spatial and temporal patterns, as well as their links to atmospheric oscillation and topography, is scarce in Bangladesh....

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Main Authors:	Mallick, Javed, Salam, Roquia, Islam, H. M. Touhidul, Shahid, Shamsuddin, Mohammad Kamruzzaman, Mohammad Kamruzzaman, Pal, Subodh Chandra, Ahmad Bhat, Shakeel, Elbeltagi, Ahmed, Rodrigues, Thiago Rangel, Ibrahim, Sobhy M., Islam, Abu Reza Md. Towfiqul
Format:	Article
Published:	Springer Nature 2022
Subjects:	TA Engineering (General). Civil engineering (General)
Online Access:	http://eprints.utm.my/104585/ http://dx.doi.org/10.1007/s00704-021-03914-4
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spelling	my.utm.1045852024-02-21T08:18:57Z http://eprints.utm.my/104585/ Recent changes in temperature extremes in subtropical climate region and the role of large-scale atmospheric oscillation patterns Mallick, Javed Salam, Roquia Islam, H. M. Touhidul Shahid, Shamsuddin Mohammad Kamruzzaman, Mohammad Kamruzzaman Pal, Subodh Chandra Ahmad Bhat, Shakeel Elbeltagi, Ahmed Rodrigues, Thiago Rangel Ibrahim, Sobhy M. Islam, Abu Reza Md. Towfiqul TA Engineering (General). Civil engineering (General) Understanding the recent variations in temperature extremes is crucial to anticipate the forthcoming incidences of extreme phenomena. However, knowledge of temperature extremes’ spatial and temporal patterns, as well as their links to atmospheric oscillation and topography, is scarce in Bangladesh. To this end, this research intends to analyze the spatial and temporal trends in recent extreme temperatures and their relationships with oscillation indices and the topography of Bangladesh. Daily temperature data obtained from 20 meteorological stations for 1980–2017 were employed for this purpose. Results revealed increasing trends in summer days (SU25), tropical nights (TR20), warm days (TX90p), warmest days (TXx), and warm nights (TN90p), while decline in the coldest days (TNn), cold days (TX10p), and cold nights (TN10p) was observed in Bangladesh. Spatial distribution of trends revealed an increase in SU25 and TN90p by 1.9–2.38, 2.33–2.90 days/decade, and a decrease in TX10p and TN10p by 1.7–3.3 days/decade in most regions. Besides, TR20 showed an increase of 3.22–4.17 days/decade in all sub-regions. The temperature extremes of Bangladesh showed a significant connection with multivariate ENSO index (MEI) and Sea Surface Temperature (SST). Besides, the extremes in most regions of the country showed a significant connection with Southern Oscillation Index (SOI) and Indian Ocean Dipole (IOD). The influence of atmospheric oscillation indices was more evident on cold days/nights than on warm days/nights. TN10p and SU25 also showed a significant correlation with elevation, which suggests an increase in cold night and summer day temperature with the increase in elevation in Bangladesh. Large-scale climate mode reanalysis revealed that a strong (weak) wind speed, enhancing (decreasing) geopotential height, and fast warming (cooling) over the northwestern (southeast) region have attributed to the variations in extreme temperature in Bangladesh to several extents. These findings will assist the policymakers in disaster mitigation and climate change adaptation in Bangladesh. Springer Nature 2022-04 Article PeerReviewed Mallick, Javed and Salam, Roquia and Islam, H. M. Touhidul and Shahid, Shamsuddin and Mohammad Kamruzzaman, Mohammad Kamruzzaman and Pal, Subodh Chandra and Ahmad Bhat, Shakeel and Elbeltagi, Ahmed and Rodrigues, Thiago Rangel and Ibrahim, Sobhy M. and Islam, Abu Reza Md. Towfiqul (2022) Recent changes in temperature extremes in subtropical climate region and the role of large-scale atmospheric oscillation patterns. Theoretical and Applied Climatology, 148 (1-2). pp. 329-347. ISSN 0177-798X http://dx.doi.org/10.1007/s00704-021-03914-4 DOI:10.1007/s00704-021-03914-4
institution	Universiti Teknologi Malaysia
building	UTM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknologi Malaysia
content_source	UTM Institutional Repository
url_provider	http://eprints.utm.my/
topic	TA Engineering (General). Civil engineering (General)
spellingShingle	TA Engineering (General). Civil engineering (General) Mallick, Javed Salam, Roquia Islam, H. M. Touhidul Shahid, Shamsuddin Mohammad Kamruzzaman, Mohammad Kamruzzaman Pal, Subodh Chandra Ahmad Bhat, Shakeel Elbeltagi, Ahmed Rodrigues, Thiago Rangel Ibrahim, Sobhy M. Islam, Abu Reza Md. Towfiqul Recent changes in temperature extremes in subtropical climate region and the role of large-scale atmospheric oscillation patterns
description	Understanding the recent variations in temperature extremes is crucial to anticipate the forthcoming incidences of extreme phenomena. However, knowledge of temperature extremes’ spatial and temporal patterns, as well as their links to atmospheric oscillation and topography, is scarce in Bangladesh. To this end, this research intends to analyze the spatial and temporal trends in recent extreme temperatures and their relationships with oscillation indices and the topography of Bangladesh. Daily temperature data obtained from 20 meteorological stations for 1980–2017 were employed for this purpose. Results revealed increasing trends in summer days (SU25), tropical nights (TR20), warm days (TX90p), warmest days (TXx), and warm nights (TN90p), while decline in the coldest days (TNn), cold days (TX10p), and cold nights (TN10p) was observed in Bangladesh. Spatial distribution of trends revealed an increase in SU25 and TN90p by 1.9–2.38, 2.33–2.90 days/decade, and a decrease in TX10p and TN10p by 1.7–3.3 days/decade in most regions. Besides, TR20 showed an increase of 3.22–4.17 days/decade in all sub-regions. The temperature extremes of Bangladesh showed a significant connection with multivariate ENSO index (MEI) and Sea Surface Temperature (SST). Besides, the extremes in most regions of the country showed a significant connection with Southern Oscillation Index (SOI) and Indian Ocean Dipole (IOD). The influence of atmospheric oscillation indices was more evident on cold days/nights than on warm days/nights. TN10p and SU25 also showed a significant correlation with elevation, which suggests an increase in cold night and summer day temperature with the increase in elevation in Bangladesh. Large-scale climate mode reanalysis revealed that a strong (weak) wind speed, enhancing (decreasing) geopotential height, and fast warming (cooling) over the northwestern (southeast) region have attributed to the variations in extreme temperature in Bangladesh to several extents. These findings will assist the policymakers in disaster mitigation and climate change adaptation in Bangladesh.
format	Article
author	Mallick, Javed Salam, Roquia Islam, H. M. Touhidul Shahid, Shamsuddin Mohammad Kamruzzaman, Mohammad Kamruzzaman Pal, Subodh Chandra Ahmad Bhat, Shakeel Elbeltagi, Ahmed Rodrigues, Thiago Rangel Ibrahim, Sobhy M. Islam, Abu Reza Md. Towfiqul
author_facet	Mallick, Javed Salam, Roquia Islam, H. M. Touhidul Shahid, Shamsuddin Mohammad Kamruzzaman, Mohammad Kamruzzaman Pal, Subodh Chandra Ahmad Bhat, Shakeel Elbeltagi, Ahmed Rodrigues, Thiago Rangel Ibrahim, Sobhy M. Islam, Abu Reza Md. Towfiqul
author_sort	Mallick, Javed
title	Recent changes in temperature extremes in subtropical climate region and the role of large-scale atmospheric oscillation patterns
title_short	Recent changes in temperature extremes in subtropical climate region and the role of large-scale atmospheric oscillation patterns
title_full	Recent changes in temperature extremes in subtropical climate region and the role of large-scale atmospheric oscillation patterns
title_fullStr	Recent changes in temperature extremes in subtropical climate region and the role of large-scale atmospheric oscillation patterns
title_full_unstemmed	Recent changes in temperature extremes in subtropical climate region and the role of large-scale atmospheric oscillation patterns
title_sort	recent changes in temperature extremes in subtropical climate region and the role of large-scale atmospheric oscillation patterns
publisher	Springer Nature
publishDate	2022
url	http://eprints.utm.my/104585/ http://dx.doi.org/10.1007/s00704-021-03914-4
_version_	1792147843562078208
score	13.211869

Recent changes in temperature extremes in subtropical climate region and the role of large-scale atmospheric oscillation patterns

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