DeMott, P.J., K. Sassen, M. Poellot, D. Baumgardner, D.C. Rogers, S. Brooks, A.J. Prenni, and S.M. Kreidenweis, 2003: African dust aerosols as atmospheric ice nuclei. Geophys. Res. Lett., 30, No. 14, 1732, doi:10.1029/2003GL017410.

See also, the related paper:

Sassen, K., P.J. DeMott, J. Prospero, and M.R. Poellot , 2003: Saharan Dust Storms and Indirect Aerosol Effects on Clouds: CRYSTAL-FACE Results. Geophys. Res. Lett., 30, No. 12, 1633, doi:10.1029/2003GL017371.

Summary: POWERPOINT SUMMARY