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Hygroscopic properties of aerosols in the Sahel: preliminary results

Abstract : Approximately three years of sunphotometric measurements carried out in the locality of Bidi (13.36°N; 2.30°W) in Burkina Faso (West Africa) from October 1986 to January 1989 were used to estimate the atmospheric precipitable water vapour (APW) and the Angstrom exponent values a. A study of the relationship between these two parameters on a seasonal time scale shows that an increase of water vapour in the Sahel is associated with a decrease of a values, indicating hygroscopic growth of aerosol particles. This result shows that the Sahel aerosol particles may grow in size through water vapour absorption due to hygroscopic properties.
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Submitted on : Friday, May 22, 2009 - 9:11:33 AM
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  • HAL Id : insu-00386664, version 1



Mouhamadou Bedou, Abdourahamane Konare, Ibrah Seidou-Sanda, Paul Assamoi, Arona Diedhiou. Hygroscopic properties of aerosols in the Sahel: preliminary results. Scientific Research and Essays, 2007, 2 (6), pp.177 à 183. ⟨insu-00386664⟩



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