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. Àààààààààààààààààààààà-À-s and . Caquineau,

, Université Paris 12, 61 avenue du Général de Gaulle, F-94010 Créteil, France. S. Lafon and I. N. Sokolik, School of Earth and Atmospheric Sciences, Laboratoire Interuniversitaire des Systèmes Atmosphériques

J. L. Rajot, BP, vol.11416