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Present-day erosion rate of north polar scarps on Mars due to active mass wasting

Fanara, Lida and Gwinner, Klaus and Hauber, Ernst and Oberst, J. (2019) Present-day erosion rate of north polar scarps on Mars due to active mass wasting. Icarus. Elsevier. DOI: 10.1016/j.icarus.2019.113434 ISSN 0019-1035

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Official URL: https://www.sciencedirect.com/science/article/abs/pii/S0019103519301307?via%3Dihub


At the margins of the north polar deposits of dusty water ice on Mars, steep scarps reveal layered deposits that preserve a record of the planet's recent climate changes. Some of these scarps are currently the most active places on Mars with annual avalanches and block falls. We estimated the erosion rate of a steep north polar scarp by automatically identifying newly apparent blocks throughout a time series of HiRISE images. The total depositional volume over three Mars years corresponds to a minimum erosion rate of ~0.3 m3 per Mars year per meter along the scarp, or a minimum average scarp retreat rate of ~0.2 m/kyr. This rate cannot balance published 0.01 m/yr viscous flow rates, implying that either lower rates of the latter occur or that other processes contribute more than block falls to the slopes' steepness.

Item URL in elib:https://elib.dlr.de/131272/
Document Type:Article
Additional Information:bisher nur online erschienen
Title:Present-day erosion rate of north polar scarps on Mars due to active mass wasting
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Fanara, LidaLida.Fanara (at) dlr.deUNSPECIFIED
Gwinner, KlausKlaus.Gwinner (at) dlr.deUNSPECIFIED
Hauber, ErnstErnst.Hauber (at) dlr.dehttps://orcid.org/0000-0002-1375-304X
Oberst, J.Juergen.Oberst (at) dlr.deUNSPECIFIED
Journal or Publication Title:Icarus
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.icarus.2019.113434
Keywords:Mars, erosion, north polar scarps, aktive mass wasting
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Projekt MARS-EXPRESS / HRSC
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geodesy
Institute of Planetary Research > Planetary Geology
Deposited By: Scholten, Dipl.-Ing. Frank
Deposited On:28 Nov 2019 09:12
Last Modified:28 Nov 2019 09:12

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