气候变化领域集成服务门户(CCPortal): Observed trends in climate extremes over Bangladesh from 1981 to 2010

CCPortal

DOI	10.3354/cr01539
	Observed trends in climate extremes over Bangladesh from 1981 to 2010
	Khan M.J.U.; Islam A.K.M.S.; Das M.K.; Mohammed K.; Bala S.K.; Tarekul Islam G.M.
发表日期	2019
ISSN	0936-577X
起始页码	45
结束页码	61
卷号	77 期号:1
英文摘要	Bangladesh regularly faces various extreme events (floods, droughts, cyclones, and heat waves), but there is a knowledge gap between average climate and climate extremes over the country. The purpose of this study is to quantify the trends over Bangladesh for the period 1981-2010 using the extreme temperature and precipitation indices developed by the CCl/ WCRP/JCOMM Expert Team on Climate Change Detection and Indices. We used precipitation and temperature data from 26 meteorological stations, calculated trends in the indices using Sen's slope estimator, and tested significance using the non-parametric Mann-Kendall trend test. For the temperature indices, we found an overall increasing warming trend. Average annual maximum and minimum temperatures increased by 0.3 and 0.4°C decade -1 respectively. A faster rise of both maximum and minimum temperature was found compared with previous studies. The frequency of warm days increased by 12 days decade -1 . The frequency of warm (cold) nights increased (decreased) by 7 (11) days decade -1 . The overall warming was accelerated at the end of the climatic period (2001-2010). Precipitation indices showed an overall decreasing trend, in contrast to other studies in this region. Trends in consecutive dry days (CDD) indicated a drying tendency at a rate of 10 days decade -1 . A decreasing rate of about 84 mm decade -1 was observed in annual average total precipitation. Except for CDD, most of the precipitation trends were statistically not significant and spatially incoherent. Statistically significant change was observed in extreme temperature events, with a strong and consistent spatial pattern. Our results pave the way for further investigations into future changes using results from climate simulations. © 2019 Inter-Research.
英文关键词	Bangladesh; Climate change; ETCCDI; Expert team on climate change detection and indices; Extreme indices; Observed records
语种	英语
scopus关键词	air temperature; climate change; expert system; extreme event; index method; knowledge; precipitation assessment; regional climate; trend analysis; weather station; Bangladesh
来源期刊	Climate Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146945
作者单位	Institute of Water and Flood Management, Bangladesh University of Engineering and Technology (BUET), Dhaka, 1000, Bangladesh
推荐引用方式 GB/T 7714	Khan M.J.U.,Islam A.K.M.S.,Das M.K.,et al. Observed trends in climate extremes over Bangladesh from 1981 to 2010[J],2019,77(1).
APA	Khan M.J.U.,Islam A.K.M.S.,Das M.K.,Mohammed K.,Bala S.K.,&Tarekul Islam G.M..(2019).Observed trends in climate extremes over Bangladesh from 1981 to 2010.Climate Research,77(1).
MLA	Khan M.J.U.,et al."Observed trends in climate extremes over Bangladesh from 1981 to 2010".Climate Research 77.1(2019).