Statistics – Computation
Scientific paper
Apr 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000icar..144..419g&link_type=abstract
Icarus, Volume 144, Issue Icarus, pp. 419-431.
Statistics
Computation
12
Scientific paper
The perennial north polar H2O ice cap of Mars is investigated with the dynamic/thermodynamic ice-sheet model SICOPOLIS. Computational results for flow velocities, ice temperatures, and surface accumulation/ablation rates are presented for the steady state with present conditions as well as for transient scenarios over idealized obliquity cycles with periods of 1.3 Myr and 125 kyr. The transient simulations lead to a stop-and-go-type dynamics with a cold and almost stagnant modern ice cap and a warmer flowing ice cap for past large-obliquity periods. The most likely scenario for the present ice cap comprises an ice volume of 1.2 million km3, a maximum thickness of 3 km, the absence of pronounced local isostasy, H2O-ice accumulation rates of the order of tenth-mm water equivalent (w.e.) per Earth year (yr), flow velocities of the order of mm/yr and an ice base far below pressure melting.
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