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Communication incl. Poster: BibTeX citation key:  Vingataramin
Vingataramin, S., Legrand, M., Damiri, B., Nakes, M. T., Cuesta, J., Edouart, D., Flamant, C., Caquineau, S., Formenti, P. & Desboeufs, K. 2009. Ground-based remote sensing in TIR of Saharan mineral dust at Tamanrasset in the framework of the African Monsoon Multidisciplinary Analysis field campaign. Work presented at Third International AMMA Conference, July 20—24, at Ouagadougou, Burkina Faso.
Added by: Devic 2009-09-09 08:28:13    Last Edited by: roussot 2009-11-04 20:04:58
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Categories: Aerosol and Chemistry, Atmospheric processes
Keywords: Aerosol, Chemistry
Creators: Caquineau, Cuesta, Damiri, Desboeufs, Edouart, Flamant, Formenti, Legrand, Nakes, Vingataramin
Publisher: African Monsoon Multidisciplinary Analyses (Ouagadougou, Burkina Faso)
Collection: Third International AMMA Conference

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Abstract
In the framework of the AMMA program, ground-based instruments including CLIMAT radiometer, AERONET Sun photometer, the TReSS platform and its MiniLidar, were deployed at the Saharan meteorological station of Tamanrasset, Algeria, from February to November 2006. This experiment was dedicated to the study of the seasonal evolution of the Saharan atmospheric boundary layer (Cuesta et al., 2008) where the effect of mineral dust is important. Mineral dust shows large spatio-temporal variations of concentration and significant changes in its particles size distribution and physico-chemical composition. Due to its size spectrum extended toward supermicronic, the particles of mineral dust impact not only on solar but also on telluric radiation. In this work, we focus on mineral dust thermal infrared (TIR) remote sensing measurements with the radiometer CLIMAT. This instrument developed at the LOA (Legrand et al., 2000; Brogniez et al., 2003), is designed to measure brightness temperatures and radiances in several channels in the [8-14 μm] window from the ground level. The ability of this radiometer to quantitatively detect mineral dust and retrieve its radiative properties as a spectral signature, from measurements of clear-sky radiances, has been demonstrated in previous studies NIGER-98 (Pancrati, 2003). We will present results of spectral signature of mineral dust obtained at Tamanrasset site. This signature is examined with respect to (i) the aerosol chemical and mineral compositions from samples collected in-situ, (ii) the AERONET particles size distribution and (iii) the emission sources located using HYSPLIT back-trajectories and IDDI images.
Last Edited by: roussot