Planet-wide sand motion on mars

Nathan T. Bridges, Mary C. Bourke, Paul E. Geissler, Maria E. Banks, Cindy Colon, Serina Diniega, Matthew P. Golombek, Candice J. Hansen, Sarah Mattson, Alfred S. Mcewen, Michael T. Mellon, Nicholas Stantzos, Bradley J. Thomson

Research output: Contribution to journalArticle

92 Scopus citations

Abstract

Prior to Mars Reconnaissance Orbiter data, images of Mars showed no direct evidence for dune and ripple motion. This was consistent with climate models and lander measurements indicating that winds of sufficient intensity to mobilize sand were rare in the low-density atmosphere. We show that many sand ripples and dunes across Mars exhibit movement of as much as a few meters per year, demonstrating that Martian sand migrates under current conditions in diverse areas of the planet. Most motion is probably driven by wind gusts that are not resolved in global circulation models. A past climate with a thicker atmosphere is only required to move large ripples that contain coarse grains.

Original languageEnglish (US)
Pages (from-to)31-34
Number of pages4
JournalGeology
Volume40
Issue number1
DOIs
StatePublished - Jan 1 2012

ASJC Scopus subject areas

  • Geology

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    Bridges, N. T., Bourke, M. C., Geissler, P. E., Banks, M. E., Colon, C., Diniega, S., Golombek, M. P., Hansen, C. J., Mattson, S., Mcewen, A. S., Mellon, M. T., Stantzos, N., & Thomson, B. J. (2012). Planet-wide sand motion on mars. Geology, 40(1), 31-34. https://doi.org/10.1130/G32373.1