气候变化领域集成服务门户(CCPortal): Investigation of physical and optical properties of aerosol over high altitude stations along the sub-Himalayan region of North-Eastern India

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DOI	10.1016/j.apr.2019.11.010
	Investigation of physical and optical properties of aerosol over high altitude stations along the sub-Himalayan region of North-Eastern India
	Borgohain A.; Kundu S.S.; Barman N.; Raju P.L.N.; Roy R.; Saha B.; Ajay P.; Pathak B.; Bhuyan P.K.
发表日期	2020
ISSN	13091042
卷号	11 期号:2
英文摘要	The present study focuses on exploring the spectral dependency of atmospheric extinction, the size distribution of aerosols, black carbon concentration and absorption and compensation parameter along the sub-Himalayan region of northeastern India, a field campaign was conducted from 1st February to 20th February 2018. Measurements were taken at three different stations in Arunachal Pradesh i.e., Tawang (2990 m a.s.l), New Palin (1300 m a.s.l.), and Geku (200 m a.s.l.). Techniques of Ångström exponent's curvature effect has been used to determine the aerosol size distribution over the stations. The mean black carbon concentration was 3.98 ± 1.03 μg m−3, 4.27 ± 1.22 μg m−3 and 2.38 ± 1.05 μg m−3 at Tawang, New Palin, and Geku respectively. The daily mean absorption coefficient at 370 nm (σ370) was (1.46 ± 0.56) × 10−4, (1.84 ± 0.42) × 10−4, and (1.85 ± 1.8) × 10−4 at Tawang, New Palin, and Geku. Whereas daily mean absorption coefficient at 880 nm (σ880) was (0.33 ± 0.08) × 10−4, (0.42 ± 0.05) × 10−4, and (0.2 ± 0.17) × 10−4. The σ370 was 126%, 125%, and 164% higher than the absorption at the longer wavelength (880 nm) which indicates a higher biomass burning BC. The average Absorption Ångström Exponent (AAE) at 370–880 nm were 1.59 ± 0.23, 1.63 ± 0.23 and 2.28 ± 0.57 at Tawang, New Palin, and Geku. In addition, at Tawang, New Palin, and Geku, the average AAE in the shorter spectral range (370–520 nm) were 2.43 ± 0.97, 2.41 ± 1.22 and 3.09 ± 1.54, whereas in longer spectral range (520–880 nm) were 1.05 ± 0.05, 1.13 ± 0.18 and 1.44 ± 0.33, respectively. © 2020 Turkish National Committee for Air Pollution Research and Control
英文关键词	Absorption Ångström exponent; Biomass burning; Compensation parameter; Ångström exponent
语种	英语
来源期刊	Atmospheric Pollution Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120609
作者单位	North-Eastern Space Application Centre, Umiam, Meghalaya, India; Department of Physics, National Institute of Technology AgartalaTripura, India; Maharaja Bir Bikram University, Agartala, Tripura, India; Dibrugarh University, Dibrugarh, 786004, India
推荐引用方式 GB/T 7714	Borgohain A.,Kundu S.S.,Barman N.,et al. Investigation of physical and optical properties of aerosol over high altitude stations along the sub-Himalayan region of North-Eastern India[J],2020,11(2).
APA	Borgohain A..,Kundu S.S..,Barman N..,Raju P.L.N..,Roy R..,...&Bhuyan P.K..(2020).Investigation of physical and optical properties of aerosol over high altitude stations along the sub-Himalayan region of North-Eastern India.Atmospheric Pollution Research,11(2).
MLA	Borgohain A.,et al."Investigation of physical and optical properties of aerosol over high altitude stations along the sub-Himalayan region of North-Eastern India".Atmospheric Pollution Research 11.2(2020).