Arid
DOI10.1007/s11356-015-4788-9
Assessment of aerosol optical and micro-physical features retrieved from direct and diffuse solar irradiance measurements from Skyradiometer at a high altitude station at Merak
Ningombam, Shantikumar S.1; Srivastava, A. K.2; Bagare, S. P.1; Singh, R. B.1; Kanawade, V. P.3; Dorjey, Namgyal4
通讯作者Ningombam, Shantikumar S.
来源期刊ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
ISSN0944-1344
EISSN1614-7499
出版年2015
卷号22期号:21页码:16610-16619
英文摘要

Optical and micro-physical features of aerosol are reported using Skyradiometer (POM-01L, Prede, Japan) observations taken from a high-altitude station Merak, located in north-eastern Ladakh of the western trans-Himalayas region during January 2011 to December 2013. The observed daily mean aerosol optical depth (AOD, at 500 nm) at the site varied from 0.01 to 0.14. However, 75 % of the observed AOD lies below 0.05 during the study period. Seasonal peaks of AOD occurred in spring as 0.06 and minimum in winter as 0.03 which represents the aged background aerosols at the site. Yearly mean AOD at 500 nm is found to be around 0.04 and inter-annual variations of AOD is very small (nearly +/- 0.01). Angstrom exponent (a) varied seasonally from 0.73 in spring to 1.5 in autumn. About 30 % of the observed a lies below 0.8 which are the indicative for the presence of coarse-mode aerosols at the site. The station exhibits absorbing aerosol features which prominently occurred during spring and that may be attributed by the transported anthropogenic aerosol from Indo-Gangatic Plain (IGP). Results were well substantiated with the air mass back-trajectory analysis. Furthermore, seasonal mean of single scattering albedo (SSA at 500 nm) varied from of 0.94 to 0.98 and a general increasing trend is noticed from 400 to 870 nm wavelengths. These features are apparently regional characteristics of the site. Aerosol asymmetry factor (AS) decreases gradually from 400 to 870 nm and varied from 0.66 to 0.69 at 500 nm across the seasons. Dominance of desert-dust aerosols, associated by coarse mode, is indicated by tri-modal features of aerosol volume size distribution over the station during the entire seasons.


英文关键词Aerosol optical depth Angstrom exponent Single scattering albedo Trans-Himalayas
类型Article
语种英语
国家India ; Sweden
收录类别SCI-E
WOS记录号WOS:000363964700033
WOS关键词TRANS-HIMALAYAN REGION ; SKY-RADIOMETER ; SUNPHOTOMETER ; DEPTH ; VARIABILITY ; ABSORPTION ; AERONET ; HANLE ; CHINA ; SOUTH
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/2XILL650/187166
作者单位1.Indian Inst Astrophys, Bangalore 560034, Karnataka, India;
2.Indian Inst Trop Meteorol, New Delhi Branch, New Delhi 110060, India;
3.Lund Univ, Dept Phys Geog & Ecosyst Sci, S-22362 Lund, Sweden;
4.Indian Astron Observ IIA Hanle, Ladakh, India
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Ningombam, Shantikumar S.,Srivastava, A. K.,Bagare, S. P.,et al. Assessment of aerosol optical and micro-physical features retrieved from direct and diffuse solar irradiance measurements from Skyradiometer at a high altitude station at Merak[J],2015,22(21):16610-16619.
APA Ningombam, Shantikumar S.,Srivastava, A. K.,Bagare, S. P.,Singh, R. B.,Kanawade, V. P.,&Dorjey, Namgyal.(2015).Assessment of aerosol optical and micro-physical features retrieved from direct and diffuse solar irradiance measurements from Skyradiometer at a high altitude station at Merak.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,22(21),16610-16619.
MLA Ningombam, Shantikumar S.,et al."Assessment of aerosol optical and micro-physical features retrieved from direct and diffuse solar irradiance measurements from Skyradiometer at a high altitude station at Merak".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 22.21(2015):16610-16619.
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