Rayleigh Lidar unusual Stratospheric Temperature Inversion following the Stratospheric Warming
International Journal of Innovative Science and Modern Engineering (IJISME), 4 (6):
6-10 (June 2016)Abstract
Rayleigh Lidar system established at National Atmospheric Research Laboratory (NARL) over a tropical site, Gadanki (13.8o N, 79.2o E), is operational since March 1998. Using photon count profiles and a model atmosphere (CIRA-86) temperature profiles are derived for the height range of 30-80 km. 628 Rayleigh Lidar observations covering the altitude range of stratosphere and mesosphere collected during the period March 1998 – August 2006. The long-term knowledge of this temperature profile has allowed us to know its average climatology as well as the nighttime evolution. During the period of Mar 2003 we observed profiles which differ considerably from the average for the same period in other years. Specially, profile obtained on the night 27 Mar 2003 called our attention by presenting an unusual stratospheric inversion layer with a decrease of 10-12 K between 38-41 km and there was a minor warming on stratopause. Analysis of additional SABER temperature data showed that inversion layer at the same altitude.