Updating the global inventory of dune fields on Mars and identification of many small dune fields

The Mars Global Digital Dune Database (MGD(3)) archives the location of large dark dunes on Mars, including several morphological, mineralogical, and thermophysical characteristics; it has been widely used by the Mars scientific community as a resource for aeolian studies (Hayward, R. K., Mullins, K. F., Fenton, L. K., Hare, T. M., Titus, T. N., Bourke, M. C., Colaprete, A., and Christensen, P. R. (2007a), Mars Global Digital Dune Database: MC2 - MC29: U.S. Geological Survey Open-File Report 2007-1158, doi:https://doi.org/10.3133/20071158). This work presents the results of a new global dune field survey using high resolution orbital images of Mars that have been acquired in the years since the MGD3 was first compiled. More than 2000 new dune fields have been identified and mapped, more than doubling the previous number known. The new dune fields are mostly small (