GEODUST

GEOmorphology of DUST sources and dynamics of dust emission from different geomorphic units
An International Focus Group of the INQUA TERPRO Commission

Mineral dust plays multiple roles in mediating physical and biogeochemical exchanges among the atmosphere, land and ocean, and thus is an active component of the Earth system. One of the approaches to study the environmental effects of dust is through numerical models in varying spatial scales. These models depend on a realistic representation of dust source areas and dynamics of dust emission from these sources. Although progress has been made in identifying the geomorphic units that are the major dust sources, and in evaluating the dynamics of dust emission, these first stages of the dust cycle remain fundamental knowledge gaps and need to be further addressed. These gaps are one of the limiting factors for existing global models of dust cycle and thus a more comprehensive treatment of the geomorphic controls on emission is required to improve the performance of dust-cycle models. The investigation of field and remote sensing geomorphology of dust sources and dynamics of dust emission are, in summary, the main scientific issues of the GEODUST International Focus Group of INQUA.