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DOI	10.1016/j.atmosres.2021.105803
	Spatial and temporal variation of aerosol optical depths over six major cities in Bangladesh
	Zaman S.U.; Pavel M.R.S.; Joy K.S.; Jeba F.; Islam M.S.; Paul S.; Bari M.A.; Salam A.
发表日期	2021
ISSN	0169-8095
卷号	262
英文摘要	The Aerosol Optical Depth (AOD) is a crucial parameter for assessing aerosol content and determining the level of air pollution. In this study, we represent almost seven years' aerosol optical behavioral patterns of six major cities in Bangladesh with emphasis on trends, seasonal variations, sources characterization, comparison between ground (AERONET) and satellite (MODIS Terra and Aqua) measurements, and relation with particulate matter (PM). High AOD values (>0.70) were obtained in most of the western parts of the country in all seasons. Decreasing patterns were observed from northwest to southeast. Average values of AOD for Dhaka, Chattagram, Rajshahi, Khulna, Barishal, and Sylhet were 0.71 ± 0.08, 0.50 ± 0.08, 0.78 ± 0.06, 0.72 ± 0.14, 0.64 ± 0.08, 0.60 ± 0.07 (Terra), and 0.59 ± 0.07, 0.48 ± 0.05, 0.69 ± 0.08, 0.64 ± 0.12, 0.56 ± 0.05, 0.56 ± 0.07 (Aqua), respectively. AERONET AODs at 870, 500, and 340 nm, and Ångström Exponent (AE440–870) values for Dhaka city were 0.40, 0.78, 1.06, and 1.18, respectively. Mean Absolute Error (MAE), Root Mean Square Error (RMSE), and Correlation coefficient (r) values were 0.23, 0.30, 0.64 (Terra) and 0.12, 0.29, 0.76 (Aqua), respectively. Both PM2.5 and PM10 were well correlated with all AODs but weakly correlated with AE. AODs, AE, and PM were negatively associated with meteorological variables such as rainfall, relative humidity, wind speed, and temperature. Anthropogenic and biomass burning aerosols were dominated in all four seasons, but dust and mixed type aerosols were only dominated in pre-monsoon and monsoon seasons. This research would help researchers further know the nature of atmospheric aerosols and how they affect seasonal patterns. © 2021 Elsevier B.V.
英文关键词	AERONET; Aerosol Optical Depth; MODIS; Seasonal Variation; Source Characterization
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/236613
作者单位	Department of Chemistry, Faculty of Science, University of Dhaka, Dhaka, 1000, Bangladesh; Department of Environmental and Sustainable Engineering, University at Albany, State University of New York, 1400 Washington Avenue, Albany, NY 12222, United States
推荐引用方式 GB/T 7714	Zaman S.U.,Pavel M.R.S.,Joy K.S.,et al. Spatial and temporal variation of aerosol optical depths over six major cities in Bangladesh[J],2021,262.
APA	Zaman S.U..,Pavel M.R.S..,Joy K.S..,Jeba F..,Islam M.S..,...&Salam A..(2021).Spatial and temporal variation of aerosol optical depths over six major cities in Bangladesh.Atmospheric Research,262.
MLA	Zaman S.U.,et al."Spatial and temporal variation of aerosol optical depths over six major cities in Bangladesh".Atmospheric Research 262(2021).