Rayleigh Lidar investigation of stratospheric sudden warming over a low latitude station, Gadanki (13.5ºN; 79.2ºE): a statistical study

D. V. Charyulu; V. Sivakumar; H. Bencherif; D. Narayana Rao

doi:10.1117/12.739275

18 October 2007 Rayleigh Lidar investigation of stratospheric sudden warming over a low latitude station, Gadanki (13.5ºN; 79.2ºE): a statistical study

D. V. Charyulu, V. Sivakumar, H. Bencherif, D. Narayana Rao

Author Affiliations +

Proceedings Volume 6681, Lidar Remote Sensing for Environmental Monitoring VIII; 66810X (2007) https://doi.org/10.1117/12.739275
Event: Optical Engineering + Applications, 2007, San Diego, California, United States

Abstract

In this paper, we report the statistical characteristics of Stratospheric Sudden Warming (SSW) events observed over a low latitude station, Gadanki; 13.5°N, 79.2°E. The study uses 7 years (1998 to 2004) of quasi-continuous nighttime LiDAR temperature measurements, which corresponds to 312 observations. The statistical characteristics are presented in terms of major or minor, magnitude of warming, height of occurrence and stratopause descent with reference to the mean climatological profile. The warming events are classified into major or minor warming with respect to the observed warm temperature magnitude and reversal in the zonal wind direction in the polar region using National Centre for Environmental Prediction (NCEP) reanalysis data. In total, 14 SSW events observed and have been classified into 2 (14.3 %) major and 12 (85.7 %) minor warming events. The magnitudes of warm temperatures with respect to the mean winter temperature is in the range from 8.2 K to 18.1 K. Occurrence of SSWs are observed to accompany with the descent of stratopause layer from 0 km to 6.3 km with respect to the calculated mean winter stratopause height.

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D. V. Charyulu, V. Sivakumar, H. Bencherif, and D. Narayana Rao "Rayleigh Lidar investigation of stratospheric sudden warming over a low latitude station, Gadanki (13.5ºN; 79.2ºE): a statistical study", Proc. SPIE 6681, Lidar Remote Sensing for Environmental Monitoring VIII, 66810X (18 October 2007); https://doi.org/10.1117/12.739275

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