Water induced sediment levitation enhances downslope transport on Mars

Raack, Jan; Conway, Susan J.; Herny, Clémence Emilie Lucile; Balme, Matthew R.; Carpy, Sabrina; Patel, Manish R. (2017). Water induced sediment levitation enhances downslope transport on Mars. Nature communications, 8(1) Nature Publishing Group 10.1038/s41467-017-01213-z

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On Mars, locally warm surface temperatures (~293 K) occur, leading to the possibility of (transient) liquid water on the surface. However, water exposed to the martian atmosphere will boil, and the sediment transport capacity of such unstable water is not well understood. Here, we present laboratory studies of a newly recognized transport mechanism: “levitation” of saturated sediment bodies on a cushion of vapor released by boiling. Sediment transport where this mechanism is active is about nine times greater than without this effect, reducing the amount of water required to transport comparable sediment volumes by nearly an order of magnitude. Our calculations show that the effect of levitation could persist up to ~48 times longer under reduced martian gravity. Sediment levitation must therefore be considered when evaluating the formation of recent and present-day martian mass wasting features, as much less water may be required to form such features than previously thought.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences

UniBE Contributor:

Herny, Clémence Emilie Lucile

Subjects:

500 Science > 520 Astronomy
600 Technology > 620 Engineering

ISSN:

2041-1723

Publisher:

Nature Publishing Group

Language:

English

Submitter:

Dora Ursula Zimmerer

Date Deposited:

17 Sep 2018 16:23

Last Modified:

23 Sep 2018 02:29

Publisher DOI:

10.1038/s41467-017-01213-z

BORIS DOI:

10.7892/boris.119983

URI:

https://boris.unibe.ch/id/eprint/119983

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