2006: Circulation of the North Atlantic Ocean from altimetry and the Gravity Recovery and Climate Experiment geoid
[1] We discuss the ocean circulation derived from the temporally averaged sea surface height, which is referenced to the recently released geoid from the Gravity Recovery and Climate Experiment (GRACE) mission (GRACE Gravity Model 02 (GGM02)). The creation of a precise, independent geoid allows for...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.603.7598 2023-05-15T17:34:35+02:00 2006: Circulation of the North Atlantic Ocean from altimetry and the Gravity Recovery and Climate Experiment geoid Steven R. Jayne The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.603.7598 http://mit.whoi.edu/cms/files/jayne_jgr.2006_38563.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.603.7598 http://mit.whoi.edu/cms/files/jayne_jgr.2006_38563.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://mit.whoi.edu/cms/files/jayne_jgr.2006_38563.pdf text ftciteseerx 2016-01-08T14:09:32Z [1] We discuss the ocean circulation derived from the temporally averaged sea surface height, which is referenced to the recently released geoid from the Gravity Recovery and Climate Experiment (GRACE) mission (GRACE Gravity Model 02 (GGM02)). The creation of a precise, independent geoid allows for the calculation of the reference gravitational potential undulation surface, which is associated with the resting ocean surface height. This reference height is then removed from the temporally averaged sea surface height, leaving the dynamic ocean topography. At its most basic level the dynamic ocean topography can be related to the ocean’s surface circulation through geostrophy. This has previously been impracticable because of large uncertainties in previous estimates of the Earth’s geoid. Prior geoids included the temporally averaged sea surface from altimeters as a proxy for the geoid and therefore were unsuitable for calculations of the ocean’s circulation. Geoid undulations are calculated from the GRACE geoid and compared to those from the NASA Goddard Space Flight Center and National Imagery and Mapping Agency Joint Earth Geopotential Model (EGM96) geoid. Error estimates are made to assess the accuracy of the new geoid. The deep ocean pressure field is also estimated by combining the calculated dynamic ocean topography with hydrography. Finally, the derived circulation is compared to independent observations of the circulation from sea surface drifters and subsurface floats. It is shown that the GGM02 geoid is significantly more accurate for use in estimating the ocean’s circulation. Text North Atlantic Unknown |
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[1] We discuss the ocean circulation derived from the temporally averaged sea surface height, which is referenced to the recently released geoid from the Gravity Recovery and Climate Experiment (GRACE) mission (GRACE Gravity Model 02 (GGM02)). The creation of a precise, independent geoid allows for the calculation of the reference gravitational potential undulation surface, which is associated with the resting ocean surface height. This reference height is then removed from the temporally averaged sea surface height, leaving the dynamic ocean topography. At its most basic level the dynamic ocean topography can be related to the ocean’s surface circulation through geostrophy. This has previously been impracticable because of large uncertainties in previous estimates of the Earth’s geoid. Prior geoids included the temporally averaged sea surface from altimeters as a proxy for the geoid and therefore were unsuitable for calculations of the ocean’s circulation. Geoid undulations are calculated from the GRACE geoid and compared to those from the NASA Goddard Space Flight Center and National Imagery and Mapping Agency Joint Earth Geopotential Model (EGM96) geoid. Error estimates are made to assess the accuracy of the new geoid. The deep ocean pressure field is also estimated by combining the calculated dynamic ocean topography with hydrography. Finally, the derived circulation is compared to independent observations of the circulation from sea surface drifters and subsurface floats. It is shown that the GGM02 geoid is significantly more accurate for use in estimating the ocean’s circulation. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Steven R. Jayne |
spellingShingle |
Steven R. Jayne 2006: Circulation of the North Atlantic Ocean from altimetry and the Gravity Recovery and Climate Experiment geoid |
author_facet |
Steven R. Jayne |
author_sort |
Steven R. Jayne |
title |
2006: Circulation of the North Atlantic Ocean from altimetry and the Gravity Recovery and Climate Experiment geoid |
title_short |
2006: Circulation of the North Atlantic Ocean from altimetry and the Gravity Recovery and Climate Experiment geoid |
title_full |
2006: Circulation of the North Atlantic Ocean from altimetry and the Gravity Recovery and Climate Experiment geoid |
title_fullStr |
2006: Circulation of the North Atlantic Ocean from altimetry and the Gravity Recovery and Climate Experiment geoid |
title_full_unstemmed |
2006: Circulation of the North Atlantic Ocean from altimetry and the Gravity Recovery and Climate Experiment geoid |
title_sort |
2006: circulation of the north atlantic ocean from altimetry and the gravity recovery and climate experiment geoid |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.603.7598 http://mit.whoi.edu/cms/files/jayne_jgr.2006_38563.pdf |
genre |
North Atlantic |
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North Atlantic |
op_source |
http://mit.whoi.edu/cms/files/jayne_jgr.2006_38563.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.603.7598 http://mit.whoi.edu/cms/files/jayne_jgr.2006_38563.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766133466455343104 |