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Variability of spider spatial configuration at the Martian south pole

Hao, Jingyan and Michael, Gregory and Adeli, Solmaz and Jaumann, Ralf and Portyankina, G. and Hauber, Ernst and Millot, C. and Zuschneid, W. (2020) Variability of spider spatial configuration at the Martian south pole. Planetary and Space Science, 185, p. 104848. Elsevier. doi: 10.1016/j.pss.2020.104848. ISSN 0032-0633.

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Official URL: https://www.sciencedirect.com/science/article/abs/pii/S0032063319300716


Araneiform terrain, or “spider” (spider-like surface modifications) is suggested to form through basal sublimation of seasonal translucent CO2 slab ice and subsequent gas jetting, and so far only known to occur at the Martian south pole. Their spatial configuration characteristics remain incompletely understood. We observed non-random spatial distributions in seven study regions with significant regional variation of average spacings. This non-randomness results from the pressure release by jetting from one spider, inhibiting ice rupture in the vicinity to initiate a new spider. Rose diagrams constructed from our trough orientation mapping show that spider troughs do not have preferred orientations and appear randomly distributed. We suggest that substrate properties such as permeability, porosity and cohesion regulate and modify the spatial configuration of a spider population on a regional scale, and insolation and obliquity determine whether general conditions are favorable for spider formation. The limited areal distribution of spiders may be due to the strict formation constraints on the thickness of the seasonal translucent CO2 slab ice. This work provides insight into the regional variability of gas jetting and spider formation.

Item URL in elib:https://elib.dlr.de/139603/
Document Type:Article
Title:Variability of spider spatial configuration at the Martian south pole
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Michael, GregoryInstitute of Geological Sciences, Freie Universität Berlin, Malteserstr. 74-100, 12249 Berlin, Germanyhttps://orcid.org/0000-0002-2612-6694UNSPECIFIED
Adeli, SolmazUNSPECIFIEDhttps://orcid.org/0000-0001-9972-409XUNSPECIFIED
Jaumann, RalfUNSPECIFIEDhttps://orcid.org/0000-0002-9759-6597UNSPECIFIED
Portyankina, G.Laboratory for Space Physics, Boulder, Colorado, USAUNSPECIFIEDUNSPECIFIED
Hauber, ErnstUNSPECIFIEDhttps://orcid.org/0000-0002-1375-304XUNSPECIFIED
Millot, C.Lyon Geology Laboratory: Earth, Planet, Environment, Claude Bernard University, 69622, Villeurbanne Cedex, FranceUNSPECIFIEDUNSPECIFIED
Zuschneid, W.Institute of Geosciences, Freie Universität Berlin, GermanyUNSPECIFIEDUNSPECIFIED
Date:June 2020
Journal or Publication Title:Planetary and Space Science
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:p. 104848
Keywords:Mars, Ice, polar, CO2, sublimation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Project Mars Express HRSC (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geology
Deposited By: Hauber, Ernst
Deposited On:14 Dec 2020 11:12
Last Modified:28 Nov 2023 07:24

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