气候变化领域集成服务门户(CCPortal): Modifications in aerosol physical, optical and radiative properties during heavy aerosol events over Dushanbe, Central Asia

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DOI	10.1016/j.gsf.2021.101251
	Modifications in aerosol physical, optical and radiative properties during heavy aerosol events over Dushanbe, Central Asia
	Rupakheti, Dipesh; Rupakheti, Maheswar; Yin, Xiufeng; Hofer, Julian; Rai, Mukesh; Hu, Yuling; Abdullaev, Sabur F.; Kang, Shichang
通讯作者	Kang, SC (通讯作者)，Chinese Acad Sci, State Key Lab Cryospher Sci, Northwest Inst Ecoenvironm & Resources, Donggang West Rd 320, Lanzhou 730000, Peoples R China.
发表日期	2021
ISSN	1674-9871
卷号	12 期号:6
英文摘要	The location of Central Asia, almost at the center of the global dust belt region, makes it susceptible for dust events. The studies on atmospheric impact of dust over the region are very limited despite the large area occupied by the region and its proximity to the mountain regions (Tianshan, Hindu Kush-Karakoram-Himalayas, and Tibetan Plateau). In this study, we analyse and explain the modification in aerosols' physical, optical and radiative properties during various levels of aerosol loading observed over Central Asia utilizing the data collected during 2010-2018 at the AERONET station in Dushanbe, Tajikistan. Aerosol episodes were classified as strong anthropogenic, strong dust and extreme dust. The mean aerosol optical depth (AOD) during these three types of events was observed a factor of similar to 3, 3.5 and 6.6, respectively, higher than the mean AOD for the period 2010-2018. The corresponding mean fine-mode fraction was 0.94, 0.20 and 0.16, respectively, clearly indicating the dominance of fine-mode anthropogenic aerosol during the first type of events, whereas coarse-mode dust aerosol dominated during the other two types of events. This was corroborated by the relationships among various aerosol parameters (AOD vs. AE, and EAE vs. AAE, SSA and RRI). The mean aerosol radiative forcing (ARF) at the top of the atmosphere (ARF(TOA)), the bottom of the atmosphere (ARF(BOA)), and in the atmosphere (ARF(ATM)) were -35 +/- 7, -73 +/- 16, and 38 +/- 17 Wm(2) during strong anthropogenic events, -48 +/- 12, -85 +/- 24, and 37 +/- 15 Wm(2) during strong dust event, and -68 +/- 19, -117 +/- 38, and 49 +/- 21 Wm(2) during extreme dust events. Increase in aerosol loading enhanced the aerosol-induced atmospheric heating rate to 0.5-1.6 K day(-1) (strong anthropogenic events), 0.4-1.9 K day(-1) (strong dust events) and 0.8-2.7 K day(-1) (extreme dust events). The source regions of air masses to Dushanbe during the onset of such events are also identified. Our study contributes to the understanding of dust and anthropogenic aerosols, in particular the extreme events and their disproportionally high radiative impacts over Central Asia. (C) 2021 China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V.
关键词	GANGETIC BASIN DUST EPISODES MINERAL DUST BLACK CARBON INDO AERONET DEPTH ABSORPTION CLIMATOLOGY VARIABILITY
英文关键词	Dust events; Aerosol optical properties; AERONET; Dushanbe; Central Asia
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000714726400006
来源期刊	GEOSCIENCE FRONTIERS
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/254115
作者单位	[Rupakheti, Dipesh; Yin, Xiufeng; Rai, Mukesh; Hu, Yuling; 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; [Hofer, Julian] Leibniz Inst Tropospher Res, Leipzig, Germany; [Abdullaev, Sabur F.] Acad Sci Tajikistan, Phys Tech Inst, Dushanbe, Tajikistan; [Kang, Shichang] Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Rupakheti, Dipesh,Rupakheti, Maheswar,Yin, Xiufeng,et al. Modifications in aerosol physical, optical and radiative properties during heavy aerosol events over Dushanbe, Central Asia[J]. 中国科学院西北生态环境资源研究院,2021,12(6).
APA	Rupakheti, Dipesh.,Rupakheti, Maheswar.,Yin, Xiufeng.,Hofer, Julian.,Rai, Mukesh.,...&Kang, Shichang.(2021).Modifications in aerosol physical, optical and radiative properties during heavy aerosol events over Dushanbe, Central Asia.GEOSCIENCE FRONTIERS,12(6).
MLA	Rupakheti, Dipesh,et al."Modifications in aerosol physical, optical and radiative properties during heavy aerosol events over Dushanbe, Central Asia".GEOSCIENCE FRONTIERS 12.6(2021).