Polar cap formation on Ganymede
Since thermal migration is not an effective mechanism for water transport in the polar regions at the Galilean satellites, some other process must be responsible for the formation of Ganymede's polar caps. It is proposed that Ganymede's polar caps are the optical manifestation of a process...
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1985
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ftnasantrs:oai:casi.ntrs.nasa.gov:19850015175 2023-05-15T16:40:44+02:00 Polar cap formation on Ganymede Pilcher, C. B. Shaya, E. J. Unclassified, Unlimited, Publicly available Apr 1, 1985 http://ntrs.nasa.gov/search.jsp?R=19850015175 unknown http://ntrs.nasa.gov/search.jsp?R=19850015175 Accession ID: 85N23486 No Copyright Other Sources 91 NASA, Washington Repts. of Planetary Geol. and Geophys. Program, 1984; p 33-34 1985 ftnasantrs 2012-02-15T16:06:03Z Since thermal migration is not an effective mechanism for water transport in the polar regions at the Galilean satellites, some other process must be responsible for the formation of Ganymede's polar caps. It is proposed that Ganymede's polar caps are the optical manifestation of a process that began with the distribution of an ice sheet over the surface of Ganymede. The combined processes of impact gardening and thermal migration led, in regions at latitudes less than 40 to 45 deg., to the burial of some fraction of this ice, the migration of some to the polar caps margins, and a depletion of free ice in the optical surface. At higher latitudes, no process was effective in removing ice from the optical surface, so the remanants of the sheet are visible today. Other/Unknown Material Ice Sheet NASA Technical Reports Server (NTRS) Ganymede ENVELOPE(-68.477,-68.477,-70.857,-70.857) |
institution |
Open Polar |
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NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
91 |
spellingShingle |
91 Pilcher, C. B. Shaya, E. J. Polar cap formation on Ganymede |
topic_facet |
91 |
description |
Since thermal migration is not an effective mechanism for water transport in the polar regions at the Galilean satellites, some other process must be responsible for the formation of Ganymede's polar caps. It is proposed that Ganymede's polar caps are the optical manifestation of a process that began with the distribution of an ice sheet over the surface of Ganymede. The combined processes of impact gardening and thermal migration led, in regions at latitudes less than 40 to 45 deg., to the burial of some fraction of this ice, the migration of some to the polar caps margins, and a depletion of free ice in the optical surface. At higher latitudes, no process was effective in removing ice from the optical surface, so the remanants of the sheet are visible today. |
format |
Other/Unknown Material |
author |
Pilcher, C. B. Shaya, E. J. |
author_facet |
Pilcher, C. B. Shaya, E. J. |
author_sort |
Pilcher, C. B. |
title |
Polar cap formation on Ganymede |
title_short |
Polar cap formation on Ganymede |
title_full |
Polar cap formation on Ganymede |
title_fullStr |
Polar cap formation on Ganymede |
title_full_unstemmed |
Polar cap formation on Ganymede |
title_sort |
polar cap formation on ganymede |
publishDate |
1985 |
url |
http://ntrs.nasa.gov/search.jsp?R=19850015175 |
op_coverage |
Unclassified, Unlimited, Publicly available |
long_lat |
ENVELOPE(-68.477,-68.477,-70.857,-70.857) |
geographic |
Ganymede |
geographic_facet |
Ganymede |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19850015175 Accession ID: 85N23486 |
op_rights |
No Copyright |
_version_ |
1766031154997100544 |