干旱区生态环境知识资源中心(Arid): Columnar aerosol properties and radiative effects over Dushanbe, Tajikistan in Central Asia

Arid

DOI	10.1016/j.envpol.2020.114872
	Columnar aerosol properties and radiative effects over Dushanbe, Tajikistan in Central Asia
	Rupakheti, Dipesh; Rupakheti, Maheswar; Abdullaev, Sabur F.; Yin, Xiufeng; Kang, Shichang
通讯作者	Kang, SC
来源期刊	ENVIRONMENTAL POLLUTION
ISSN	0269-7491
EISSN	1873-6424
出版年	2020
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 Angstrom 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. (C) 2020 Elsevier Ltd. All rights reserved.
英文关键词	Aerosol optical properties Angstrom exponent Radiative forcing Heating rate Dushanbe Central Asia
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000564560100001
WOS关键词	SOVIET-AMERICAN EXPERIMENT ; OPTICAL-PROPERTIES ; AIR-POLLUTION ; TIBETAN PLATEAU ; URBAN SITE ; SEASONAL VARIABILITY ; SIZE DISTRIBUTIONS ; ATMOSPHERIC DUST ; GANGETIC BASIN ; AERONET SITES
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325924
作者单位	[Rupakheti, Dipesh; Yin, Xiufeng; Kang, Shichang] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Peoples R China; [Rupakheti, Maheswar] Inst Adv Sustainabil Studies, Potsdam, Germany; [Kang, Shichang] Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China; [Abdullaev, Sabur F.] Acad Sci Tajikistan, Phys Tech Inst, Dushanbe, Tajikistan
推荐引用方式 GB/T 7714	Rupakheti, Dipesh,Rupakheti, Maheswar,Abdullaev, Sabur F.,et al. Columnar aerosol properties and radiative effects over Dushanbe, Tajikistan in Central Asia[J],2020,265.
APA	Rupakheti, Dipesh,Rupakheti, Maheswar,Abdullaev, Sabur F.,Yin, Xiufeng,&Kang, Shichang.(2020).Columnar aerosol properties and radiative effects over Dushanbe, Tajikistan in Central Asia.ENVIRONMENTAL POLLUTION,265.
MLA	Rupakheti, Dipesh,et al."Columnar aerosol properties and radiative effects over Dushanbe, Tajikistan in Central Asia".ENVIRONMENTAL POLLUTION 265(2020).