Seasonal and long term variations of aerosol content in the atmospheric mixing region at a tropical station on the Arabian sea-coast

Parameswaran, K. ; Rajan, Rekha ; Vijayakumar, G. ; Rajeev, K. ; Krishna Moorthy, K. ; Nair, Prabha R. ; Satheesh, S. K. (1998) Seasonal and long term variations of aerosol content in the atmospheric mixing region at a tropical station on the Arabian sea-coast Journal of Atmospheric and Solar-Terrestrial Physics, 60 (1). pp. 17-25. ISSN 1364-6826

Full text not available from this repository.

Official URL: http://linkinghub.elsevier.com/retrieve/pii/S13646...

Related URL: http://dx.doi.org/10.1016/S1364-6826(97)00096-5

Abstract

Altitude profiles of aerosol number density in the atmospheric mixing region obtained using a bistatic CW lidar at Trivandrum (8.55°N, 77°E), a station situated on the West coast, near the southern tip of the Indian peninsula, during the period 1989 to 1994 showed a systematic seasonal dependence. The number density shows a peak at ~300-400 m which is quite prominent during the local summer period and becomes less discernable during the North-East monsoon period. The mixing region aerosol optical depth estimated using these aerosol number density profiles shows a seasonal variation with two maxima; one during the winter to summer transition period and the other during the South-West monsoon period. A long term increasing trend is also observed in the aerosol optical depth from 1989 to 1994. A comparison of the mixing region aerosol optical depth with the total aerosol optical depth obtained using a solar radiometer has shown that this increasing trend is not confined to the mixing region alone but extends to higher altitudes also. This study also shows that under quiescent conditions, ~30% on average of the total aerosol optical depth, at 0.5 μm wavelength, is contributed by the aerosols in the altitude region below 1 km.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:17065
Deposited On:16 Nov 2010 08:36
Last Modified:04 Jun 2011 06:35

Repository Staff Only: item control page