Spatial characteristics of aerosol physical properties over the northeastern parts of peninsular India

Niranjan, K. ; Rao, B. Melleswara ; Brahmanandam, P. S. ; Madhavan, B. L. ; Sreekanth, V. ; Krishna Moorthy, K. (2005) Spatial characteristics of aerosol physical properties over the northeastern parts of peninsular India Annales Geophysicae, 23 (10). pp. 3219-3227. ISSN 0992-7689

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Official URL: http://www.ann-geophys.net/23/3219/2005/angeo-23-3...

Related URL: http://dx.doi.org/10.5194/angeo-23-3219-2005

Abstract

Measurements on aerosol spectral optical depths and near surface mass-size distributions made at several locations in the states of Andhra Pradesh, Orissa and Chattisgarh, constituting the northeastern part of the peninsular India during the ISRO-GBP land campaign-I show significant regional variations in aerosol physical properties. Higher spectral optical depths were observed in the coastal regions and over southern latitudes compared to interior continental regions and northern latitudes. The optical depths, size index "α"and the near surface aerosol mass concentrations indicate a relative abundance of nucleation mode aerosols in the northern latitudes, in contrast to the dominance of the accumulation mode aerosols at the eastern coastal and southern latitudes. The airmass pathways derived from the back trajectory analysis indicate that the higher aerosol population in the accumulation mode, and consequently the higher optical depths in the southern locations, could be due to the transport of aerosol from the polluted north Indian regions via the oceanic region over the Bay of Bengal, where significant particle growth is expected, increasing the population of accumulation mode aerosols over these regions.

Item Type:Article
Source:Copyright of this article belongs to European Geosciences Union.
Keywords:Atmospheric Composition and Chemistry (Aerosol and Particles); Synoptic Scale Meteorology (Meteorology and Atmospheric Dynamics)
ID Code:17158
Deposited On:16 Nov 2010 08:18
Last Modified:17 May 2016 01:50

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