Speculation on Martian north polar wind circulation and the resultant orientations of polar sand dunes
When seen at frost cap minimum, Martian north polar erg dunes north of 80 deg N record east winds, while those south of that latitude record west winds. Many of the transverse dunes are considered to be reversing dunes, and dunes in the two fields may have reversed at least once during the lifetime...
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1983
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ftnasantrs:oai:casi.ntrs.nasa.gov:19830065866 2023-05-15T17:39:49+02:00 Speculation on Martian north polar wind circulation and the resultant orientations of polar sand dunes Ward, A. W. Doyle, K. B. Unclassified, Unlimited, Publicly available Sep 1, 1983 http://ntrs.nasa.gov/search.jsp?R=19830065866 unknown http://ntrs.nasa.gov/search.jsp?R=19830065866 Accession ID: 83A47084 Copyright Other Sources 91 Icarus; 55; Sept 1983 ftnasantrs 2012-02-15T15:32:57Z When seen at frost cap minimum, Martian north polar erg dunes north of 80 deg N record east winds, while those south of that latitude record west winds. Many of the transverse dunes are considered to be reversing dunes, and dunes in the two fields may have reversed at least once during the lifetime of the Viking Orbiters. It is proposed that the average polar winds are strong, off-pole northwest winds in the fall, moderate west winds in winter, latitude-dependent weak-to-strong off-pole northeast winds in spring, and weak west winds in summer, as has been largely confirmed by Viking images of near polar clouds. Over millenia, the combination of reversing west and east winds could produce the biomodal distributions of dune orientations observed at the north pole. Other/Unknown Material North Pole NASA Technical Reports Server (NTRS) North Pole |
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Open Polar |
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NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
91 |
spellingShingle |
91 Ward, A. W. Doyle, K. B. Speculation on Martian north polar wind circulation and the resultant orientations of polar sand dunes |
topic_facet |
91 |
description |
When seen at frost cap minimum, Martian north polar erg dunes north of 80 deg N record east winds, while those south of that latitude record west winds. Many of the transverse dunes are considered to be reversing dunes, and dunes in the two fields may have reversed at least once during the lifetime of the Viking Orbiters. It is proposed that the average polar winds are strong, off-pole northwest winds in the fall, moderate west winds in winter, latitude-dependent weak-to-strong off-pole northeast winds in spring, and weak west winds in summer, as has been largely confirmed by Viking images of near polar clouds. Over millenia, the combination of reversing west and east winds could produce the biomodal distributions of dune orientations observed at the north pole. |
format |
Other/Unknown Material |
author |
Ward, A. W. Doyle, K. B. |
author_facet |
Ward, A. W. Doyle, K. B. |
author_sort |
Ward, A. W. |
title |
Speculation on Martian north polar wind circulation and the resultant orientations of polar sand dunes |
title_short |
Speculation on Martian north polar wind circulation and the resultant orientations of polar sand dunes |
title_full |
Speculation on Martian north polar wind circulation and the resultant orientations of polar sand dunes |
title_fullStr |
Speculation on Martian north polar wind circulation and the resultant orientations of polar sand dunes |
title_full_unstemmed |
Speculation on Martian north polar wind circulation and the resultant orientations of polar sand dunes |
title_sort |
speculation on martian north polar wind circulation and the resultant orientations of polar sand dunes |
publishDate |
1983 |
url |
http://ntrs.nasa.gov/search.jsp?R=19830065866 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
North Pole |
geographic_facet |
North Pole |
genre |
North Pole |
genre_facet |
North Pole |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19830065866 Accession ID: 83A47084 |
op_rights |
Copyright |
_version_ |
1766140590667333632 |