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Advances in Meteorology
Volume 2011, Article ID 390826, 9 pages
http://dx.doi.org/10.1155/2011/390826
Research Article

Characterization of the Vertical Structure of Coastal Atmospheric Boundary Layer over Thumba ( 𝟖 . 𝟓 N , 𝟕 𝟔 . 𝟗 E ) during Different Seasons

1Space Physics Laboratory, Vikram Sarabhai Space Centre, Department of Space, Indian Space Research Organization, Government of India, Thiruvananthapuram 695 022, India
2MET Facility, Vikram Sarabhai Space Centre, Department of Space, Indian Space Research Organization, Government of India, Thiruvananthapuram 695 022, India

Received 24 December 2010; Revised 8 March 2011; Accepted 23 March 2011

Academic Editor: Branko Grisogono

Copyright © 2011 Sandhya K. Nair et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Vertical profiles of meteorological parameters obtained from balloon-borne GPS Radiosonde for a period of more than two years are analyzed for characterization of the coastal atmospheric boundary layer (CABL) over Thumba ( 8 . 5 N , 7 6 . 9 E , India). The study reports seasonal variability in the thickness of three different sublayers of the CABL, namely, mixed layer, turbulent flow, and sea breeze flow. Among the three, the vertical thickness of sea breeze flow showed considerable dominance on the other two throughout the year. Mixed layer heights derived through gradients in virtual potential temperature ( 𝜃 𝑣 ) showed large seasonal variability with a peak in the Summer and Post-Monsoon. On the other hand, the vertical thickness of turbulent flow remained steady all through the year. Results from the present study indicate that the magnitudes of mixed layer heights are often larger than the turbulent flow thickness.