Deep-Sea Research II 50 (2003) 141–166 Early evolution of an Agulhas Ring
Rings shed at the Agulhas retroflection are an integral part of interoceanic exchange south of Africa. There is clear evidence of westward ring translation from the northern Cape Basin across the South Atlantic Ocean. Early ring development and translation from the southern to the northern Cape Basi...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.531.9612 2023-05-15T18:21:11+02:00 Deep-Sea Research II 50 (2003) 141–166 Early evolution of an Agulhas Ring C. Schmida O. Boebelb W. Zenkc J. R. E. Lutjeharmsd S. L. Garzolie P. L. Richardsonf C. Barrong The Pennsylvania State University CiteSeerX Archives 2002 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.531.9612 http://www.aoml.noaa.gov/phod/docs/schmid_et_al2003a.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.531.9612 http://www.aoml.noaa.gov/phod/docs/schmid_et_al2003a.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.aoml.noaa.gov/phod/docs/schmid_et_al2003a.pdf text 2002 ftciteseerx 2016-01-08T10:39:12Z Rings shed at the Agulhas retroflection are an integral part of interoceanic exchange south of Africa. There is clear evidence of westward ring translation from the northern Cape Basin across the South Atlantic Ocean. Early ring development and translation from the southern to the northern Cape Basin, however, are obscured by an intensely variable kinematic field close to the spawning site. In this study unique in situ observations, obtained in March to September 1997, are analyzed to improve the understanding of the early development of a juvenile Agulhas Ring. In March the ring was surveyed near 371S; 161E; approximately 4 months after its generation. Its strength and size were in the upper range typical for Agulhas Rings, and its trapping depth extended down to at least 1600 dbar according to geostrophic velocities and RAFOS trajectories in the ring. Between March and September the ring propagated in a general northwestward direction; however, RAFOS trajectories and MODAS sea-surface steric height fields revealed a large variability of the translation speed (3 cm s1 to more than 20 cm s1) and direction. In September 1997, the mature ring was examined near 311S; 91E: By this time, its available heat and salt anomaly were reduced by about 30% and its available potential energy was reduced by about 70%. This indicates that a significant loss of the ring characteristics occurred on the way from the southern to the northern Cape Basin. One-third of this loss is due to Text South Atlantic Ocean Unknown |
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Rings shed at the Agulhas retroflection are an integral part of interoceanic exchange south of Africa. There is clear evidence of westward ring translation from the northern Cape Basin across the South Atlantic Ocean. Early ring development and translation from the southern to the northern Cape Basin, however, are obscured by an intensely variable kinematic field close to the spawning site. In this study unique in situ observations, obtained in March to September 1997, are analyzed to improve the understanding of the early development of a juvenile Agulhas Ring. In March the ring was surveyed near 371S; 161E; approximately 4 months after its generation. Its strength and size were in the upper range typical for Agulhas Rings, and its trapping depth extended down to at least 1600 dbar according to geostrophic velocities and RAFOS trajectories in the ring. Between March and September the ring propagated in a general northwestward direction; however, RAFOS trajectories and MODAS sea-surface steric height fields revealed a large variability of the translation speed (3 cm s1 to more than 20 cm s1) and direction. In September 1997, the mature ring was examined near 311S; 91E: By this time, its available heat and salt anomaly were reduced by about 30% and its available potential energy was reduced by about 70%. This indicates that a significant loss of the ring characteristics occurred on the way from the southern to the northern Cape Basin. One-third of this loss is due to |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
C. Schmida O. Boebelb W. Zenkc J. R. E. Lutjeharmsd S. L. Garzolie P. L. Richardsonf C. Barrong |
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C. Schmida O. Boebelb W. Zenkc J. R. E. Lutjeharmsd S. L. Garzolie P. L. Richardsonf C. Barrong Deep-Sea Research II 50 (2003) 141–166 Early evolution of an Agulhas Ring |
author_facet |
C. Schmida O. Boebelb W. Zenkc J. R. E. Lutjeharmsd S. L. Garzolie P. L. Richardsonf C. Barrong |
author_sort |
C. Schmida |
title |
Deep-Sea Research II 50 (2003) 141–166 Early evolution of an Agulhas Ring |
title_short |
Deep-Sea Research II 50 (2003) 141–166 Early evolution of an Agulhas Ring |
title_full |
Deep-Sea Research II 50 (2003) 141–166 Early evolution of an Agulhas Ring |
title_fullStr |
Deep-Sea Research II 50 (2003) 141–166 Early evolution of an Agulhas Ring |
title_full_unstemmed |
Deep-Sea Research II 50 (2003) 141–166 Early evolution of an Agulhas Ring |
title_sort |
deep-sea research ii 50 (2003) 141–166 early evolution of an agulhas ring |
publishDate |
2002 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.531.9612 http://www.aoml.noaa.gov/phod/docs/schmid_et_al2003a.pdf |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_source |
http://www.aoml.noaa.gov/phod/docs/schmid_et_al2003a.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.531.9612 http://www.aoml.noaa.gov/phod/docs/schmid_et_al2003a.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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1766200333331070976 |