Results from a global mineral dust transport model are available here.
Spatial, temporal, and size distributions of mineral dust with sizes of less than 10 5m radius were calculated with a global dust model (Tegen and Fung 1994) based on the GISS three-dimensional atmospheric tracer transport model (Russell and Lerner 1981). The total dust load as well as the ... part that is deflated from disturbed soils was calculated (Tegen and Fung 1995). The contribution from disturbed soils should be taken into account in climate change studies (Tegen et al. 1996). As dust particle size information is important for calculations of the dust radiative effect, we provide concentrations for 8 particle size classes with effective radii between 0.1 5m and 10 5m which were transported independently in the model.
Tegen, I. and A.A. Lacis (1994), Parameterization of mineral dust particle sizes and their radiative properties for climate impact studies, for climate impact studies. In Aerosols and Atmospheric Optics: Radiative Balance and Visual Air Quality, Proceedings of the International Specialty Conference, 293-305, Snowbird, Utah