气候变化领域集成服务门户(CCPortal): Spatiotemporal changes and modulations of extreme climatic indices in monsoon-dominated climate region linkage with large-scale atmospheric oscillation

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DOI	10.1016/j.atmosres.2021.105840
	Spatiotemporal changes and modulations of extreme climatic indices in monsoon-dominated climate region linkage with large-scale atmospheric oscillation
	Islam H.M.T.; Islam A.R.M.T.; Abdullah-Al-Mahbub M.; Shahid S.; Tasnuva A.; Kamruzzaman M.; Hu Z.; Elbeltagi A.; Kabir M.M.; Salam M.A.; Ibrahim S.M.
发表日期	2021
ISSN	0169-8095
卷号	264
英文摘要	Spatiotemporal changes in six precipitation and five temperature extreme indices of Bangladesh and their linkage with nine ocean-atmospheric oscillation indices have been evaluated in this study to provide necessary information for adaptation planning and development of early warning systems. Daily maximum and minimum temperatures and precipitation for the period 1980–2017 recorded at 20 stations, homogeneously distributed over the country, were employed for this purpose. Modified Mann-Kendall (MMK) test was used to evaluate trends in weather extremes, and detrended fluctuation analysis (DFA) was employed to anticipate the possible continuation of existing trends in the future. The cross-wavelet transform (CWT) was used to evaluate the linkage of weather extremes with oscillation indices in the time-frequency domain. The results indicate an increase in hot extremes and a decrease in cool indices in Bangladesh. An increase in the continuous dry day (CDD) and one-day maximum precipitation (RX1day) was also observed, indicating gradual drying and more susceptibility to flash floods at the same time. DFA revealed the possible continuation of existing trends in temperature and precipitation indices. Almost all the climatic extreme indices of Bangladesh were found to follow periodic cycles with different frequencies. The hot extremes were significantly associated with five out of nine oscillation indices, including Atlantic Multidecadal Oscillation (AMO), Arctic Oscillation (AO), East Asian Summer Monsoon Index (EASMI), Sunspot, and South Asian Summer Monsoon Index (SASMI), while cool indices were linked with AMO only. Among the precipitation indices, only CDD was positively related to AO, El Niño Southern Oscillation (ENSO), and Southern Oscillation Index (SOI) and negatively associated with the Pacific Decadal Oscillation (PDO). Analysis of circulation patterns using reanalysis datasets explored that elevated summer geopotential height, no visible anticyclonic center, reduced high cloud cover, and enhanced low cloud covers contributed to increasing hot extremes in Bangladesh. © 2021 Elsevier B.V.
英文关键词	Atmospheric circulation; Bangladesh; Extreme temperature; Global climate warming; Precipitation extremes
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/236577
作者单位	Department of Disaster Management, Begum Rokeya University, Rangpur, 5400, Bangladesh; Department of Water and Environmental Engineering, School of Civil Engineering, Universiti Teknologi Malaysia (UTM)Johor 81310, Malaysia; Institute of Disaster Management, Khulna University of Engineering & Technology, Khulna, 9208, Bangladesh; Department of Agricultural Engineering, Institute of Agriculture and Life Science, Gyeongsang National University, Jinju-daero 501, Jinju, Gyeongnam 52828, South Korea; Bangladesh Rice Research Institute, Gazipur, 1701, Bangladesh; School of Applied Meteorology, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters and Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science & Technology, Nanjing, 210044, China; Agricultural Engineering Dept, Faculty of Agriculture, Mansoura University, Mansoura, 35516, Egypt; Department of Environmental Science and Disaster Management, Noakhali Science and Te...
推荐引用方式 GB/T 7714	Islam H.M.T.,Islam A.R.M.T.,Abdullah-Al-Mahbub M.,et al. Spatiotemporal changes and modulations of extreme climatic indices in monsoon-dominated climate region linkage with large-scale atmospheric oscillation[J],2021,264.
APA	Islam H.M.T..,Islam A.R.M.T..,Abdullah-Al-Mahbub M..,Shahid S..,Tasnuva A..,...&Ibrahim S.M..(2021).Spatiotemporal changes and modulations of extreme climatic indices in monsoon-dominated climate region linkage with large-scale atmospheric oscillation.Atmospheric Research,264.
MLA	Islam H.M.T.,et al."Spatiotemporal changes and modulations of extreme climatic indices in monsoon-dominated climate region linkage with large-scale atmospheric oscillation".Atmospheric Research 264(2021).