Exposed subsurface ice sheets in the Martian mid-latitudes

Colin M. Dundas, Ali M. Bramson, Lujendra Ojha, James J. Wray, Michael T. Mellon, Shane Byrne, Alfred S. McEwen, Nathaniel E. Putzig, Donna Viola, Sarah Sutton, Erin Clark, John W. Holt

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

Thick deposits cover broad regions of the Martian mid-latitudes with a smooth mantle; erosion in these regions creates scarps that expose the internal structure of the mantle. We investigated eight of these locations and found that they expose deposits of water ice that can be >100 meters thick, extending downward from depths as shallow as 1 to 2 meters below the surface. The scarps are actively retreating because of sublimation of the exposed water ice. The ice deposits likely originated as snowfall during Mars' high-obliquity periods and have now compacted into massive, fractured, and layered ice. We expect the vertical structure of Martian ice-rich deposits to preserve a record of ice deposition and past climate.

Original languageEnglish (US)
Pages (from-to)199-201
Number of pages3
JournalScience
Volume359
Issue number6372
DOIs
StatePublished - Jan 12 2018

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Ice Cover
Ice
Sublimation
Mars
Water
Climate

ASJC Scopus subject areas

  • General

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Dundas, C. M., Bramson, A. M., Ojha, L., Wray, J. J., Mellon, M. T., Byrne, S., ... Holt, J. W. (2018). Exposed subsurface ice sheets in the Martian mid-latitudes. Science, 359(6372), 199-201. https://doi.org/10.1126/science.aao1619

Exposed subsurface ice sheets in the Martian mid-latitudes. / Dundas, Colin M.; Bramson, Ali M.; Ojha, Lujendra; Wray, James J.; Mellon, Michael T.; Byrne, Shane; McEwen, Alfred S.; Putzig, Nathaniel E.; Viola, Donna; Sutton, Sarah; Clark, Erin; Holt, John W.

In: Science, Vol. 359, No. 6372, 12.01.2018, p. 199-201.

Research output: Contribution to journalArticle

Dundas, CM, Bramson, AM, Ojha, L, Wray, JJ, Mellon, MT, Byrne, S, McEwen, AS, Putzig, NE, Viola, D, Sutton, S, Clark, E & Holt, JW 2018, 'Exposed subsurface ice sheets in the Martian mid-latitudes', Science, vol. 359, no. 6372, pp. 199-201. https://doi.org/10.1126/science.aao1619
Dundas CM, Bramson AM, Ojha L, Wray JJ, Mellon MT, Byrne S et al. Exposed subsurface ice sheets in the Martian mid-latitudes. Science. 2018 Jan 12;359(6372):199-201. https://doi.org/10.1126/science.aao1619
Dundas, Colin M. ; Bramson, Ali M. ; Ojha, Lujendra ; Wray, James J. ; Mellon, Michael T. ; Byrne, Shane ; McEwen, Alfred S. ; Putzig, Nathaniel E. ; Viola, Donna ; Sutton, Sarah ; Clark, Erin ; Holt, John W. / Exposed subsurface ice sheets in the Martian mid-latitudes. In: Science. 2018 ; Vol. 359, No. 6372. pp. 199-201.
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