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DOI	10.1016/j.envpol.2020.114872
	Columnar aerosol properties and radiative effects over Dushanbe, Tajikistan in Central Asia
	Rupakheti D.; Rupakheti M.; Abdullaev S.F.; Yin X.; Kang S.
发表日期	2020
ISSN	9596526
卷号	265
英文摘要	This paper presents the results of the study on columnar aerosol optical and physical properties and radiative effects directly observed over Dushanbe, the capital city of Tajikistan, a NASA AERONET site (equipped with a CIMEL sunphotometer) in Central Asia. The average aerosol optical depth (AOD) and Ångström exponent (AE) during the observation period from July 2010 to April 2018 were found to be 0.28 ± 0.20 and 0.82 ± 0.40, respectively. The highest seasonal AOD (0.32 ± 0.24), accompanied by the lowest average AE (0.61 ± 0.25) and fine-mode fraction in AOD (0.39), was observed during summer due to the influence of coarse particles like dust from arid regions. Fine particles were found in significant amounts during winter. The ‘mixed aerosol’ was identified as the dominant aerosol type with presence of ‘dust aerosol’ during summer and autumn seasons. Aerosol properties like volume size distribution, single scattering albedo, asymmetry parameter and refractive index suggested the influence of coarse particles (during summer and autumn). Most of the air masses reaching this site transported local and regional emissions, including from beyond Central Asia, explaining the presence of various aerosol types in Dushanbe's atmosphere. The seasonal aerosol radiative forcing efficiency (ARFE) in the atmosphere was found high (>100 Wm−2) and consistent throughout the year. Consequently, this resulted in similar seasonally coherent high atmospheric solar heating rate (HR) of 1.5 K day−1 during summer-autumn-winter, and ca. 0.9 K day−1 during spring season. High ARFE and HR values indicate that atmospheric aerosols could exert significant implications to regional air quality, climate and cryosphere over the central Asian region and downwind Tianshan and Himalaya-Tibetan Plateau mountain regions with sensitive ecosystems. © 2020 Elsevier Ltd
英文关键词	Aerosol optical properties; Angstrom exponent; Central Asia; Dushanbe; Heating rate; Radiative forcing
语种	英语
scopus关键词	Environmental Pollution
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158404
作者单位	State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; Institute for Advanced Sustainability Studies, Potsdam, Germany; Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, 100101, China; Physical Technical Institute of the Academy of Sciences of Tajikistan, Dushanbe, Tajikistan
推荐引用方式 GB/T 7714	Rupakheti D.,Rupakheti M.,Abdullaev S.F.,et al. Columnar aerosol properties and radiative effects over Dushanbe, Tajikistan in Central Asia[J]. 中国科学院西北生态环境资源研究院,2020,265.
APA	Rupakheti D.,Rupakheti M.,Abdullaev S.F.,Yin X.,&Kang S..(2020).Columnar aerosol properties and radiative effects over Dushanbe, Tajikistan in Central Asia.,265.
MLA	Rupakheti D.,et al."Columnar aerosol properties and radiative effects over Dushanbe, Tajikistan in Central Asia".265(2020).