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The Instability of a South Polar Cap on Mars Composed of Carbon Dioxide by J.F. Nye; W.B. Durham; P.M. Schenk; J.M. Moore is a Physics and Astronomy article available to read on EtoBox.

What is The Instability of a South Polar Cap on Mars Composed of Carbon Dioxide about?

If the martian south polar cap were composed of solid carbon dioxide, would it be sufficiently stable against collapse under its own weight? This question is examined in the light of new experiments on the creep of solid carbon dioxide and new high-resolution topographic mapping of the south polar cap. The conclusion from a simple model is that, with the strongest of three flow laws compatible with the measurements, CO 2 is strong enough to support a cap of this material with thickness about 1800 m for 10 7 years or more, which is the age suggested by the cratering record. However, none of the three possible flow laws will allow a 3000-m cap, the thickness suggested by stereogrammetry, to survive for 10 7 years, indicating that the south polar ice cap is probably not composed of pure CO 2 ice.

Who reads The Instability of a South Polar Cap on Mars Composed of Carbon Dioxide?

Author

J.F. Nye; W.B. Durham; P.M. Schenk; J.M. Moore

Publisher

Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV; Oxford University Press (OUP) (ISSN 0019-1035)

Published

2000

Language

EN

Field

Physics and Astronomy (Physical Sciences)