Dual polarization micropulse lidar observations of the diurnal evolution of atmospheric boundary layer over a tropical coastal station

K. Rajeev; Manoj Kumar Mishra; S. V. Sunilkumar; S. Sijikumar

doi:10.1117/12.2228049

5 May 2016 Dual polarization micropulse lidar observations of the diurnal evolution of atmospheric boundary layer over a tropical coastal station

K. Rajeev, Manoj Kumar Mishra, S. V. Sunilkumar, S. Sijikumar

Author Affiliations +

Proceedings Volume 9879, Lidar Remote Sensing for Environmental Monitoring XV; 98790V (2016) https://doi.org/10.1117/12.2228049
Event: SPIE Asia-Pacific Remote Sensing, 2016, New Delhi, India

Abstract

High-resolution dual polarized micropulse lidar (MPL) observations have been used to investigate the diurnal evolution of atmospheric boundary layer (ABL) during winter (2008–2011) over Thiruvananthapuram (8.5°N, 77°E), a tropical coastal station located at southwest Peninsular India, adjoining the Arabian Sea. The lidar observations are compared with the boundary layer characteristics derived from concurrent balloon-borne radiosonde observations. This study shows that the mixed layer height over this coastal station generally increases from <300 m in the morning to ∼1500 m by the afternoon. Growth rate of the mixed layer height is rapid (∼350 m/hr) during 09–11 IST and slows down with time to <150 m/hr during 11–14 IST and <90 m/hr during 14–16 IST. Thermal internal boundary layer during the afternoon, caused by sea breeze circulation, extends up to ∼500 m altitude and is characterized by highly spherical aerosols, while a distinctly non-spherical aerosol layer appear above this altitude, in the return flow arising from the landmass.

Citation Download Citation

K. Rajeev, Manoj Kumar Mishra, S. V. Sunilkumar, and S. Sijikumar "Dual polarization micropulse lidar observations of the diurnal evolution of atmospheric boundary layer over a tropical coastal station", Proc. SPIE 9879, Lidar Remote Sensing for Environmental Monitoring XV, 98790V (5 May 2016); https://doi.org/10.1117/12.2228049

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