Non-linear flow modelling of a Martian Lobate Debris Apron

Louise Steffensen Schmidt; Christine Schøtt Hvidberg; Jung Rack Kim; Nanna Bjørnholt Karlsson

doi:10.1017/jog.2019.54

Non-linear flow modelling of a Martian Lobate Debris Apron

Louise Steffensen Schmidt^*, Christine Schøtt Hvidberg, Jung Rack Kim, Nanna Bjørnholt Karlsson

^*Corresponding author af dette arbejde

Klima- og Geofysik / Climate and Geophysics

5 Citationer (Scopus)

Abstract

The Martian mid-latitudes contain numerous small water-ice deposits, collectively termed viscous flow features (VFFs). The shape and topography of the deposits contain information on their past flow history and formation process. In order to access this information, it is imperative to get information on their deformational properties. Here we use a high-resolution digital topography map and ice-penetrating radar data in combination with an inverse method to constrain the deformational properties of a lobate debris apron, a class of VFF, in the southern hemisphere of Mars. We find that while the creep parameter and accumulation rates are not well constrained in absolute values, their ratio is robust. We also find that the creep exponent is most likely n ≤ 3.

Originalsprog	Engelsk
Tidsskrift	Journal of Glaciology
ISSN	0022-1430
DOI	https://doi.org/10.1017/jog.2019.54
Status	Udgivet - 1 dec. 2019

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10.1017/jog.2019.54

nonlinear_flow_modelling_of_a_martian_lobate_debris_apronForlagets udgivne version, 694 KBLicens: CC BY

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abstract = "The Martian mid-latitudes contain numerous small water-ice deposits, collectively termed viscous flow features (VFFs). The shape and topography of the deposits contain information on their past flow history and formation process. In order to access this information, it is imperative to get information on their deformational properties. Here we use a high-resolution digital topography map and ice-penetrating radar data in combination with an inverse method to constrain the deformational properties of a lobate debris apron, a class of VFF, in the southern hemisphere of Mars. We find that while the creep parameter and accumulation rates are not well constrained in absolute values, their ratio is robust. We also find that the creep exponent is most likely n ≤ 3.",

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T1 - Non-linear flow modelling of a Martian Lobate Debris Apron

AU - Schmidt, Louise Steffensen

AU - Hvidberg, Christine Schøtt

AU - Kim, Jung Rack

AU - Karlsson, Nanna Bjørnholt

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N2 - The Martian mid-latitudes contain numerous small water-ice deposits, collectively termed viscous flow features (VFFs). The shape and topography of the deposits contain information on their past flow history and formation process. In order to access this information, it is imperative to get information on their deformational properties. Here we use a high-resolution digital topography map and ice-penetrating radar data in combination with an inverse method to constrain the deformational properties of a lobate debris apron, a class of VFF, in the southern hemisphere of Mars. We find that while the creep parameter and accumulation rates are not well constrained in absolute values, their ratio is robust. We also find that the creep exponent is most likely n ≤ 3.

AB - The Martian mid-latitudes contain numerous small water-ice deposits, collectively termed viscous flow features (VFFs). The shape and topography of the deposits contain information on their past flow history and formation process. In order to access this information, it is imperative to get information on their deformational properties. Here we use a high-resolution digital topography map and ice-penetrating radar data in combination with an inverse method to constrain the deformational properties of a lobate debris apron, a class of VFF, in the southern hemisphere of Mars. We find that while the creep parameter and accumulation rates are not well constrained in absolute values, their ratio is robust. We also find that the creep exponent is most likely n ≤ 3.

KW - Extraterrestrial glaciology

KW - glacier flow

KW - glacier mass balance

KW - glacier modelling

KW - ice temperature

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DO - 10.1017/jog.2019.54

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SN - 0022-1430

JO - Journal of Glaciology

JF - Journal of Glaciology

ER -

Non-linear flow modelling of a Martian Lobate Debris Apron

Abstract

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