Multiple subglacial water bodies below the south pole of Mars unveiled by new MARSIS data

Lauro, Sebastian Emanuel and Pettinelli, Elena and Caprarelli, Graziella and Guallini, Luca and Rossi, Angelo Pio and Mattei, Elisabetta and Cosciotti, Barbara and Cicchetti, Andrea and Soldovieri, Francesco and Cartacci, Marco and Di Paolo, Federico and Noschese, Raffaella and Orosei, Roberto (2021) Multiple subglacial water bodies below the south pole of Mars unveiled by new MARSIS data. Nature Astronomy, 5. pp. 63-70.


Abstract

The detection of liquid water by the Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) at the base of the south polar layered deposits in Ultimi Scopuli has reinvigorated the debate about the origin and stability of liquid water under present-day Martian conditions. To establish the extent of subglacial water in this region, we acquired new data, achieving extended radar coverage over the study area. Here, we present and discuss the results obtained by a new method of analysis of the complete MARSIS dataset, based on signal processing procedures usually applied to terrestrial polar ice sheets. Our results strengthen the claim of the detection of a liquid water body at Ultimi Scopuli and indicate the presence of other wet areas nearby. We suggest that the waters are hypersaline perchlorate brines, known to form at Martian polar regions and thought to survive for an extended period of time on a geological scale at below-eutectic temperatures.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: Historic - Faculty of Health, Engineering and Sciences - School of Sciences (6 Sep 2019 - 31 Dec 2021)
Faculty/School / Institute/Centre: Historic - Faculty of Health, Engineering and Sciences - School of Sciences (6 Sep 2019 - 31 Dec 2021)
Date Deposited: 03 Aug 2022 02:40
Last Modified: 04 Aug 2022 01:16
Uncontrolled Keywords: Deposits promethei lingula, liquid water, ice-sheet, aqueous-solutions, radar evidence, perchlorate, brines, beneath, deliquescence, stratigraphy
Fields of Research (2008): 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020199 Astronomical and Space Sciences not elsewhere classified
Fields of Research (2020): 51 PHYSICAL SCIENCES > 5101 Astronomical sciences > 510199 Astronomical sciences not elsewhere classified
Identification Number or DOI: https://doi.org/10.1038/s41550-020-1200-6
URI: http://eprints.usq.edu.au/id/eprint/50646

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