Extreme weather events and Spatio-temporal characterization of climate change variables in Bangladesh during 1975–2019
Bangladesh is susceptible to climate change, thus a detailed study, including the analyses of trends, sub-trends, extreme events and indices was conducted to obtain a complete picture of the climate change pattern in Bangladesh utilizing daily rainfall, maximum, minimum and average temperature data...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-03-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844024031499 |
| _version_ | 1797259766946332672 |
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| author | Shanjana Haider Md Rezaul Karim Md Saiful Islam Tanzilla Aktar Megumi Quazi Shahnewaz Rahnama |
| author_facet | Shanjana Haider Md Rezaul Karim Md Saiful Islam Tanzilla Aktar Megumi Quazi Shahnewaz Rahnama |
| author_sort | Shanjana Haider |
| collection | DOAJ |
| description | Bangladesh is susceptible to climate change, thus a detailed study, including the analyses of trends, sub-trends, extreme events and indices was conducted to obtain a complete picture of the climate change pattern in Bangladesh utilizing daily rainfall, maximum, minimum and average temperature data of 26 stations from 1975 to 2019 using R 4.0.2 software. For the trend analysis Mann Kendal (MK), modified Mann Kendall (mMK), Innovative Trend Analysis (ITA) and Sen’s slope methods were used. Sub-trend analysis was conducted using ITA. Standard Anomaly Index (SAI) has been used to identify the frequency and severity of extreme events. ClimPACT2 software was used to check the homogeneity and calculate the extremes of temperature and rainfall data. Our analysis showed that during the last four decades, climate variables changed their patterns and trend heterogeneously over Bangladesh. Most stations showed decremental rainfall trend when central part of the country showed a substantial decrease. The northern and central parts of the country showed significant growth of trend for annual average temperature. The temperature in the monsoon season increased, whereas those in dry season decreased. The rainfall and maximum temperature were inversely related during monsoon whereas during dry season both of them decrease. The pre-monsoon and post-monsoonal rainfall also showed decreasing trends, indicating prevailing drought conditions especially in northern and central parts of the country. The SAI analysis showed alternating drought and wet years in almost all the stations. In the past 20 years, the country’s western region experienced more drought years than before whereas the coastal region experienced more wet years. The analysis of climate extreme indices suggests that, Consecutive Dry Days (CDD), Hot Days (TX90P) and Hot Nights (TN90P) show significant increasing trend throughout the country. The agricultural productivity, water resource management and food security are anticipated to benefit from this study. |
| first_indexed | 2024-03-07T18:35:54Z |
| format | Article |
| id | doaj.art-1229417e6c9c46a3ba1de2b2e008f158 |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-04-24T23:14:39Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-1229417e6c9c46a3ba1de2b2e008f1582024-03-17T07:57:24ZengElsevierHeliyon2405-84402024-03-01105e27118Extreme weather events and Spatio-temporal characterization of climate change variables in Bangladesh during 1975–2019Shanjana Haider0Md Rezaul Karim1Md Saiful Islam2Tanzilla Aktar Megumi3Quazi Shahnewaz Rahnama4Corresponding author.; Department of Civil and Environmental Engineering, Islamic University of Technology (IUT), Gazipur 1704, BangladeshDepartment of Civil and Environmental Engineering, Islamic University of Technology (IUT), Gazipur 1704, BangladeshCorresponding author.; Department of Civil and Environmental Engineering, Islamic University of Technology (IUT), Gazipur 1704, BangladeshDepartment of Civil and Environmental Engineering, Islamic University of Technology (IUT), Gazipur 1704, BangladeshDepartment of Civil and Environmental Engineering, Islamic University of Technology (IUT), Gazipur 1704, BangladeshBangladesh is susceptible to climate change, thus a detailed study, including the analyses of trends, sub-trends, extreme events and indices was conducted to obtain a complete picture of the climate change pattern in Bangladesh utilizing daily rainfall, maximum, minimum and average temperature data of 26 stations from 1975 to 2019 using R 4.0.2 software. For the trend analysis Mann Kendal (MK), modified Mann Kendall (mMK), Innovative Trend Analysis (ITA) and Sen’s slope methods were used. Sub-trend analysis was conducted using ITA. Standard Anomaly Index (SAI) has been used to identify the frequency and severity of extreme events. ClimPACT2 software was used to check the homogeneity and calculate the extremes of temperature and rainfall data. Our analysis showed that during the last four decades, climate variables changed their patterns and trend heterogeneously over Bangladesh. Most stations showed decremental rainfall trend when central part of the country showed a substantial decrease. The northern and central parts of the country showed significant growth of trend for annual average temperature. The temperature in the monsoon season increased, whereas those in dry season decreased. The rainfall and maximum temperature were inversely related during monsoon whereas during dry season both of them decrease. The pre-monsoon and post-monsoonal rainfall also showed decreasing trends, indicating prevailing drought conditions especially in northern and central parts of the country. The SAI analysis showed alternating drought and wet years in almost all the stations. In the past 20 years, the country’s western region experienced more drought years than before whereas the coastal region experienced more wet years. The analysis of climate extreme indices suggests that, Consecutive Dry Days (CDD), Hot Days (TX90P) and Hot Nights (TN90P) show significant increasing trend throughout the country. The agricultural productivity, water resource management and food security are anticipated to benefit from this study.http://www.sciencedirect.com/science/article/pii/S2405844024031499Extreme indicesTrendSub-trendInnovative trend analysisStandard anomaly index |
| spellingShingle | Shanjana Haider Md Rezaul Karim Md Saiful Islam Tanzilla Aktar Megumi Quazi Shahnewaz Rahnama Extreme weather events and Spatio-temporal characterization of climate change variables in Bangladesh during 1975–2019 Heliyon Extreme indices Trend Sub-trend Innovative trend analysis Standard anomaly index |
| title | Extreme weather events and Spatio-temporal characterization of climate change variables in Bangladesh during 1975–2019 |
| title_full | Extreme weather events and Spatio-temporal characterization of climate change variables in Bangladesh during 1975–2019 |
| title_fullStr | Extreme weather events and Spatio-temporal characterization of climate change variables in Bangladesh during 1975–2019 |
| title_full_unstemmed | Extreme weather events and Spatio-temporal characterization of climate change variables in Bangladesh during 1975–2019 |
| title_short | Extreme weather events and Spatio-temporal characterization of climate change variables in Bangladesh during 1975–2019 |
| title_sort | extreme weather events and spatio temporal characterization of climate change variables in bangladesh during 1975 2019 |
| topic | Extreme indices Trend Sub-trend Innovative trend analysis Standard anomaly index |
| url | http://www.sciencedirect.com/science/article/pii/S2405844024031499 |
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