Mars Global Digital Dune Database (MGD3): north polar region (MC-1) distribution, applications, and volume estimates
Article first published online: 22 SEP 2011
Published in 2011 by John Wiley and Sons, Ltd.
Earth Surface Processes and Landforms
Volume 36, Issue 14, pages 1967–1972, November 2011
How to Cite
Hayward, R. K. (2011), Mars Global Digital Dune Database (MGD3): north polar region (MC-1) distribution, applications, and volume estimates. Earth Surf. Process. Landforms, 36: 1967–1972. doi: 10.1002/esp.2219
- Issue published online: 21 OCT 2011
- Article first published online: 22 SEP 2011
- Accepted manuscript online: 9 AUG 2011 01:36AM EST
- Manuscript Accepted: 1 AUG 2011
- Manuscript Revised: 8 JUL 2011
- Manuscript Received: 1 MAR 2011
- NASA. Grant Number: 08-PGG08-0019
- Olympia Undae;
The Mars Global Digital Dune Database (MGD3) now extends from 90°N to 65°S. The recently released north polar portion (MC-1) of MGD3 adds ~844 000 km2 of moderate- to large-size dark dunes to the previously released equatorial portion (MC-2 to MC-29) of the database. The database, available in GIS- and tabular-format in USGS Open-File Reports, makes it possible to examine global dune distribution patterns and to compare dunes with other global data sets (e.g. atmospheric models). MGD3 can also be used by researchers to identify areas suitable for more focused studies. The utility of MGD3 is demonstrated through three example applications. First, the uneven geographic distribution of the dunes is discussed and described. Second, dune-derived wind direction and its role as ground truth for atmospheric models is reviewed. Comparisons between dune-derived winds and global and mesoscale atmospheric models suggest that local topography may have an important influence on dune-forming winds. Third, the methods used here to estimate north polar dune volume are presented and these methods and estimates (1130 km3 to 3250 km3) are compared with those of previous researchers (1158 km3 to 15 000 km3). In the near future, MGD3 will be extended to include the south polar region. Published in 2011. This article is a US Government work and is in the public domain in the USA.