Hygroscopic properties of aerosols in the Sahel : preliminary results Bedou, M. Konare, A. Seidou-Sanda, I. Assamoi, P. /Diedhiou, Arona aerosol optical depth Angstrom coefficient atmospheric water content and hygroscopic growth Approximately three years of sunphotometric measurements carried out in the locality of Bidi (13.36 degrees N; 2.30 degrees 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. 2007 text https://www.documentation.ird.fr/hor/fdi:010044085 fdi:010044085 Bedou M., Konare A., Seidou-Sanda I., Assamoi P., Diedhiou Arona. Hygroscopic properties of aerosols in the Sahel : preliminary results. 2007, 2 (6), 177-183 EN