Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1776482 | Journal of Atmospheric and Solar-Terrestrial Physics | 2014 | 9 Pages |
Abstract
Diurnal features of aerosol optical depth (AOD) at a high-altitude station, Hanle (4500Â 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.
Keywords
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geophysics
Authors
Shantikumar S. Ningombam, S.P. Bagare, A.K. Srivastava, V.P. Kanawade, Rajendra B. Singh, Sangita K. Padhy,