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Atmospheric aerosol load morphological classification and retrieved visibility based on lidar backscatter measurements

Author: Tesfaye, M ; Sivakumar, V ; Mengistu, G ; Botai, J ; Sharma, Ameeth ; Bollig, C ; Rautenbach, CJdWH Date: 2010 In this paper, the tropospheric aerosol load morphological classification and its impact on temporal variation of visibility are investigated using a continuous 23-hour single channel CSIR-NLC mobile LIDAR backscatter measurement. The trajectory ... Read more
Development of 2-channel (532 nm and 355 nm) mobile LIDAR for mapping particulate matter in the atmosphere

Author: Sivakumar, V ; Bollig, C ; Sharma, Ameeth ; Tesfaye, M Date: Sep 2010 In this paper, the authors describe the developmentof 2-Channel (532 nm and 355 nm) mobile LIDAR system for studying atmospheric particulate matter. The system is currently tested in house at the Council for Scientific and Industrial Research ... Read more
Effects of global change on tropical ecosystems

Author: Scholes, RJ ; Van Breemen, N Date: Sep 1997 Alteration of land use will continue to be the dominant driver of environmental change in the tropics for the next several decades. It can take the form of fundamental vegetation cover transformation, or of intensification of existing land ... 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
Investigating the concept of fraunhofer lines as a potential method to detect corona in the wavelength region 338.67nm – 405nm during the day

Author: Maistry, N ; Van Coller, J ; Scutz, RA Date: Sep 2015 It is essential to detect corona discharge as a symptom of insulation breakdown in high voltage (HV) applications. However accuracy of such measurement is often degraded due to the existence of solar background noise in the signal. Fraunhofer ... Read more
LIDAR for atmosphere research over Africa

Author: Sivakumar, V ; Moema, D ; Bollig, C ; Sharma, Ameeth ; Mbatha, N ; Malinga, S ; Mengistu, G ; Bencherif, H ; Keckhut, P Date: Nov 2008 This paper describes the LIDAR for atmosphere research over Africa and current initiatives being undertaken in South Africa. A mobile LIDAR system is being developed at the Council for Scientific and Industrial Research (CSIR) National Laser ... Read more
National programme for weather, climate and atmosphere research. Annual report 1984/85

Author: Louw, CW Date: Dec 1984 This report reviews the activities of the National Programme for Weather, Climate and Atmosphere Research (NPWCAR) for 1984/85, highlights the findings and also discusses future developments and general needs regarding research within the ... Read more
System description of the mobile LIDAR of the CSIR, South Africa

Author: Sharma, Ameeth ; Sivakumar, V ; Bollig, C ; Van Der Westhuizen, C ; Moema, D Date: Nov 2009 South Africa’s first mobile LIDAR (LIght Detection And Ranging) system is being developed at the National Laser Centre (NLC) of the Council for Scientific and Industrial Research (CSIR) in Pretoria (25°45’S; 28°17’E). The system is designed ... Read more
Tuz Gölü site characteristics

Author: Leigh, L ; Helder, D ; Behnert, I ; Deadman, A ; Fox, N ; Leloglu, UM ; Özen, H ; Griffith, D Date: Jul 2011 The Tuz Gölü site does demonstrate some challenges for being used as an absolute calibration site. These include: spatial and temporal variability on the order of +/- 0.02, atmospheric transmittance variability on the order of between 0.52 ... Read more

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Browsing by Subject "Atmosphere"

Browsing by Subject "Atmosphere"

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All of ResearchSpace

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