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Morphometrics on Mars and Earth – comparative geomorphology

Hauber, Ernst (2014) Morphometrics on Mars and Earth – comparative geomorphology. Geological Remote Sensing Group: 24th Annual Meeting, 09.-11. Jan. 2014, Berlin.

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Official URL: https://www.grsg.org.uk/

Abstract

Over the last 15 years, various orbiting spacecraft have returned a variety of image and topographic data of the Martian surface that globally cover the planet. Image resolution varies depending on the camera, but a large part of the surface is now available at a resolution of ~5-6 m per pixel. Global topography from laser altimetry has a vertical accuracy of ~1 m and a lateral resolution of ~500 m, increasing towards the poles. Stereo images provide higher-resolution topography, e.g., the High Resolution Stereo Camera (HRSC) enables deriving gridded Digital Elevation Models (DEM) with cell sizes of 50 to 100 m. The combination of imaging and topographic information at local to regional scales has led to a multitude of geomorphological and geological investigations that analyse the surface in three dimensions. Such quantitative studies have increased our knowledge of the planet’s physiographic characteristics, and allowed to place constraints on the rates of surface processes. Examples of scientific applications of morphometrics include endogenic processes (rheology of lava flows, crustal deformation by tectonic processes) and exogenic processes (fluvial and lacustrine processes, ice rheology). We present an overview of available data and demonstrate their use in established geoscientific methods. We also compare the landforms on Mars with well-known terrestrial counterparts (terrestrial analogues), which serve to create working hypotheses for Martian surface processes. As a case study, we present remote-sensing data from Svalbard (acquired by an airborne version of the HRSC camera and accompanied by field work) that show periglacial and glacial landforms that are analogous to mid-latitude landforms on Mars, hypothesised to be signals of recent ice ages. Our results suggest that these landforms are indeed related to ice, but that – other than on Svalbard – thaw is only of minor importance on recent Mars, and that sublimation dominates over melting.

Item URL in elib:https://elib.dlr.de/88318/
Document Type:Conference or Workshop Item (Speech)
Title:Morphometrics on Mars and Earth – comparative geomorphology
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hauber, Ernsternst.hauber (at) dlr.deUNSPECIFIED
Date:10 January 2014
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Mars, Earth, HRSC, geomorphology, terrestrial analogues, topography, mapping, ice, water, periglacial, tectonics, faults
Event Title:Geological Remote Sensing Group: 24th Annual Meeting
Event Location:Berlin
Event Type:international Conference
Event Dates:09.-11. Jan. 2014
Organizer:Geological Society London, Geological Remote Sensing Group
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 Geology
Deposited By: Hauber, Ernst
Deposited On:26 May 2014 08:37
Last Modified:26 May 2014 08:37

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