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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/3673

Title: Lidar observations of sodium layer over low latitude, Gadanki (13.5° N, 79.2° E): seasonal and nocturnal variations
Authors: Prasanth, PV
Sivakumar, V
Sridharan, S
Kumar, YB
Bencherif, H
Rao, DN
Keywords: Atmospheric composition
Atmospheric structure
Meteorology
Atmospheric dynamics
Meteoric ablation
Sodium layer
Mesospheric sodium
Middle atmosphere dynamics
Annales Geophysicae
Issue Date: Oct-2009
Publisher: Copernicus Publications on behalf of the European Geosciences Union.
Citation: Prasanth, PV, Sivakumar, V, Sridharan, S et al. 2009. Lidar observations of sodium layer over low latitude, Gadanki (13.5° N, 79.2° E): seasonal and nocturnal variations. Annales Geophysicae, Vol. 27(10), pp 3811-3823
Abstract: In this paper, researchers present seasonal and nocturnal variations of mesospheric sodium (Na) layer parameters observed over Gadanki (13.5° N, 79.2° E), based on 166 nights during the period from January 2005 to December 2006, for the first time. The total Na content decreases during the evening and reaches a minimum value around midnight and maximum in the early morning. The year-to-year variations illustrate that Na layers reach the peak value close to 93.5 km for the year 2005 and 93 km for the year 2006 and falls to near zero value around 110 km. Though, seasonal variation of sodium density illustrates maximum values in September, December and March, researchers require a larger data base for September months to conclude the statement. The column abundance shows maximum during autumn equinox and minimum during winter. The obtained seasonal and nocturnal variation of sodium layer parameters are compared with mid-latitude observations and further possible mechanisms are discussed.
Description: Copyright: Author(s) 2009. This work is distributed under the Creative Commons Attribution 3.0 License.
URI: http://hdl.handle.net/10204/3673
ISSN: 0992-7689
Appears in Collections:Laser physics and technology
General science, engineering & technology

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