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CSIR South Africa mobile LIDAR - First scientific results: comparison with satellite, sun photometer and model simulations

Author: Sivakumar, V ; Tesfaye, M ; Alemu, W ; Moema, D ; Sharma, Ameeth ; Bollig, C ; Mengistu, G Date: Nov 2009 The authors present the first scientific results from the Council for Scientific and Industrial Research-National Laser Centre (CSIR-NLC) mobile LIght Detection And Ranging (LIDAR) and its validation and comparison with other ground-based and ... Read more
Global (50°S–50°N) distribution of water vapor observed by COSMIC GPS RO: Comparison with GPS radiosonde, NCEP, ERA-Interim, and JRA-25 reanalysis data sets

Author: Kishore, P ; Venkat Ratnam, M ; Namboothiri, SP ; Velicogna, I ; Basha, G ; Jiang, JH ; Igarashi, K ; Rao, SVB ; Sivakumar, V Date: Aug 2011 In this study, global (50°S–50°N) distribution of water vapor is investigated using COSMIC GPS RO measurements. Detailed comparisons have been made between COSMIC and high resolution GPS radiosonde measurements across 13 tropical stations and ... Read more
Rayleigh lidar observations of double stratopause structure over three different northern hemisphere stations

Author: Sivakumar, V ; Bencherif, H ; Hauchecorne, A ; Keckhut, P ; Rao, DN ; Sharma, S ; Chandra, H ; Jayaraman, A ; Rao, PB Date: Sep 2006 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 ... Read more
Temperature variability and trend estimates at tropopause and UT-LS over a subtropical site: Reunion (20.8_ S, 55.5_ E)

Author: B`egue, N ; Bencherif, H ; Sivakumar, V ; Kirgis, G ; Mz'e, N ; Leclair de Bellevue, J Date: Apr 2010 This paper mainly focuses on the trends and variability of the tropopause and UT-LS temperature using radiosonde observations carried out over 16 years (January 1993 to December 2008) from a southern subtropical site, Reunion Island (20.8° ... Read more
Tropopause characteristics and variability from 11 yr of SHADOZ observations in the southern tropics and subtropics

Author: Sivakumar, V ; Bencherif, H ; Begue, N ; Thompson, AM Date: Jul 2011 In this paper, tropopause characteristics observed from tropical to subtropical Southern Hemisphere stations using Southern Hemisphere Additional Ozonesonde (SHADOZ) data are presented for the 11-yr period of 1998–2008. Three different ... Read more

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Browsing by Subject "Radiosonde"

Browsing by Subject "Radiosonde"

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