Prasanth, PVSivakumar, VSridharan, SKumar, YBBencherif, HRao, DN2009-10-212009-10-212009-10Prasanth, 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 3811-38230992-7689http://hdl.handle.net/10204/3673Copyright: Author(s) 2009. This work is distributed under the Creative Commons Attribution 3.0 License.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.enAtmospheric compositionAtmospheric structureMeteorologyAtmospheric dynamicsMeteoric ablationSodium layerMesospheric sodiumMiddle atmosphere dynamicsAnnales GeophysicaeArticlePrasanth, P., Sivakumar, V., Sridharan, S., Kumar, Y., Bencherif, H., & Rao, D. (2009). Lidar observations of sodium layer over low latitude, Gadanki (13.5° N, 79.2° E): seasonal and nocturnal variations. http://hdl.handle.net/10204/3673Prasanth, PV, V Sivakumar, S Sridharan, YB Kumar, H Bencherif, and DN Rao "Lidar observations of sodium layer over low latitude, Gadanki (13.5° N, 79.2° E): seasonal and nocturnal variations." (2009) http://hdl.handle.net/10204/3673Prasanth P, Sivakumar V, Sridharan S, Kumar Y, Bencherif H, Rao D. Lidar observations of sodium layer over low latitude, Gadanki (13.5° N, 79.2° E): seasonal and nocturnal variations. 2009; http://hdl.handle.net/10204/3673.TY - Article AU - Prasanth, PV AU - Sivakumar, V AU - Sridharan, S AU - Kumar, YB AU - Bencherif, H AU - Rao, DN AB - 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. DA - 2009-10 DB - ResearchSpace DP - CSIR KW - Atmospheric composition KW - Atmospheric structure KW - Meteorology KW - Atmospheric dynamics KW - Meteoric ablation KW - Sodium layer KW - Mesospheric sodium KW - Middle atmosphere dynamics KW - Annales Geophysicae LK - https://researchspace.csir.co.za PY - 2009 SM - 0992-7689 T1 - Lidar observations of sodium layer over low latitude, Gadanki (13.5° N, 79.2° E): seasonal and nocturnal variations TI - Lidar observations of sodium layer over low latitude, Gadanki (13.5° N, 79.2° E): seasonal and nocturnal variations UR - http://hdl.handle.net/10204/3673 ER -