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Title: Temporal asymmetry in aerosol optical characteristics: A case study at a high-altitude station, Hanle, in Ladakh region
Authors: Shantikumar, N. S
Bagare, S.P
Srivastava, A.K
Kanawade, V.P
Rajendra, B.S
Padhy, S.K
Keywords: Aerosol Optical Depth;New-particle Formation;Desert-dust;Gaseous Precursors;Background Aerosols
Issue Date: Dec-2014
Publisher: Elsevier
Citation: Journal of Atmospheric and Solar-Terrestrial Physics, Vol. 121, pt. A, pp. 123 - 131
Abstract: Diurnal features of aerosol optical depth (AOD) at a high-altitude station, Hanle (4500 m amsl) in the western Himalayas, were studied using direct/diffuse solar irradiance measurement from a Skyradiometer (Prede) during October 2007 to December 2010. The study reveals a diurnal asymmetry in the measured aerosol characteristics, with three types of diurnal variation in AOD. Among them, Types I and II are prominent during pre-monsoon, while Type III dominates during post-monsoon. Type I appears to be associated with new-particle formation process from gaseous precursors, in addition to the combination of anthropogenic and desert-dust aerosols, probably brought by the prevailing westerly/south-westerly winds during the pre-monsoon season. The diurnal feature of the Type II may be attributed by the transported desert-dust aerosols brought by the prevailing winds. Further, Type III may be associated with the aged background aerosols over the region, pertaining to a small contribution from gaseous precursors.
Description: Restricted Access
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Appears in Collections:IIAP Publications

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