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www.atmos-chem-phys-discuss.net/6/6933/2006/
doi:10.5194/acpd-6-6933-2006
© Author(s) 2006. This work is licensed
under a Creative Commons License.
Rayleigh lidar observations of double stratopause structure over three different northern hemisphere stations
1Laboratoire de l’Atmosphère et des Cyclones, CNRS–UMR 8105, Université de La Réunion, La Reunion, France
2Service d’Aéronomie, CNRS, Paris, France
3National Atmospheric Research Laboratory, P. B. No: 123, Tirupati-517 502, India
4Physical Research Laboratory, Navarangapura, Ahmedabad-380 009, India
5National Remote Sensing Agency, Bala Nagar, Hyderabad-500 037, India
Abstract. Using four years of Rayleigh lidar data collected from three different northern hemisphere stations (Gadanki 13.5° N, 79.2° E ; Mt. Abu 24.5° N, 72.7° E and Observatoire de Haute Provence: OHP; 44° N, 6° E), the characteristics of double (separated) stratopause occurrence are presented here, for the first time. The characteristics are illustrated by a seasonal change during summer and winter and the variation in percentage of occurrence from place to place. It is found that the over-all mean normal stratopause (NS) positioned at the middle level of double stratopause (upper and lower level) with its location nearer to the lower level of double stratopause (LDS) than to the upper level of double stratopause (UDS). The frequency distribution of NS, LDS and UDS demonstrated variability with location, indicating role of dynamical activity. By making use of a quasi-continuous 40 days of lidar observations over Gadanki and OHP, the responsibility of Gravity Wave (GW) and Planetary Wave (PW) activity for the LDS and UDS occurrence are examined and presented.
Discussion Paper (PDF, 729 KB) Interactive Discussion (Closed, 4 Comments) Publication in ACP not foreseen
Citation: Sivakumar, V., Bencherif, H., Hauchecorne, A., Keckhut, P., Rao, D. N., Sharma, S., Chandra, H., Jayaraman, A., and Rao, P. B.: Rayleigh lidar observations of double stratopause structure over three different northern hemisphere stations, Atmos. Chem. Phys. Discuss., 6, 6933-6956, doi:10.5194/acpd-6-6933-2006, 2006. Bibtex EndNote Reference Manager XML
