Observing large-scale temporal variability of ocean currents by satellite altimetry - With application to the Antarctic circumpolar current
A new method is developed for studying large-scale temporal variability of ocean currents from satellite altimetric sea level measurements at intersections (crossovers) of ascending and descending orbit ground tracks. Using this method, sea level time series can be constructed from crossover sea lev...
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1985
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ftnasantrs:oai:casi.ntrs.nasa.gov:19850053015 2023-05-15T13:49:36+02:00 Observing large-scale temporal variability of ocean currents by satellite altimetry - With application to the Antarctic circumpolar current Fu, L.-L. Chelton, D. B. Unclassified, Unlimited, Publicly available May 20, 1985 http://ntrs.nasa.gov/search.jsp?R=19850053015 unknown http://ntrs.nasa.gov/search.jsp?R=19850053015 Accession ID: 85A35166 Copyright Other Sources 48 Journal of Geophysical Research; 90; 4721-473 1985 ftnasantrs 2012-02-15T16:23:12Z A new method is developed for studying large-scale temporal variability of ocean currents from satellite altimetric sea level measurements at intersections (crossovers) of ascending and descending orbit ground tracks. Using this method, sea level time series can be constructed from crossover sea level differences in small sample areas where altimetric crossovers are clustered. The method is applied to Seasat altimeter data to study the temporal evolution of the Antarctic Circumpolar Current (ACC) over the 3-month Seasat mission (July-October 1978). The results reveal a generally eastward acceleration of the ACC around the Southern Ocean with meridional disturbances which appear to be associated with bottom topographic features. This is the first direct observational evidence for large-scale coherence in the temporal variability of the ACC. It demonstrates the great potential of satellite altimetry for synoptic observation of temporal variability of the world ocean circulation. Other/Unknown Material Antarc* Antarctic Southern Ocean NASA Technical Reports Server (NTRS) Antarctic Southern Ocean The Antarctic |
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NASA Technical Reports Server (NTRS) |
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48 |
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48 Fu, L.-L. Chelton, D. B. Observing large-scale temporal variability of ocean currents by satellite altimetry - With application to the Antarctic circumpolar current |
topic_facet |
48 |
description |
A new method is developed for studying large-scale temporal variability of ocean currents from satellite altimetric sea level measurements at intersections (crossovers) of ascending and descending orbit ground tracks. Using this method, sea level time series can be constructed from crossover sea level differences in small sample areas where altimetric crossovers are clustered. The method is applied to Seasat altimeter data to study the temporal evolution of the Antarctic Circumpolar Current (ACC) over the 3-month Seasat mission (July-October 1978). The results reveal a generally eastward acceleration of the ACC around the Southern Ocean with meridional disturbances which appear to be associated with bottom topographic features. This is the first direct observational evidence for large-scale coherence in the temporal variability of the ACC. It demonstrates the great potential of satellite altimetry for synoptic observation of temporal variability of the world ocean circulation. |
format |
Other/Unknown Material |
author |
Fu, L.-L. Chelton, D. B. |
author_facet |
Fu, L.-L. Chelton, D. B. |
author_sort |
Fu, L.-L. |
title |
Observing large-scale temporal variability of ocean currents by satellite altimetry - With application to the Antarctic circumpolar current |
title_short |
Observing large-scale temporal variability of ocean currents by satellite altimetry - With application to the Antarctic circumpolar current |
title_full |
Observing large-scale temporal variability of ocean currents by satellite altimetry - With application to the Antarctic circumpolar current |
title_fullStr |
Observing large-scale temporal variability of ocean currents by satellite altimetry - With application to the Antarctic circumpolar current |
title_full_unstemmed |
Observing large-scale temporal variability of ocean currents by satellite altimetry - With application to the Antarctic circumpolar current |
title_sort |
observing large-scale temporal variability of ocean currents by satellite altimetry - with application to the antarctic circumpolar current |
publishDate |
1985 |
url |
http://ntrs.nasa.gov/search.jsp?R=19850053015 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19850053015 Accession ID: 85A35166 |
op_rights |
Copyright |
_version_ |
1766251840692813824 |