Observed variability of water properties and transports on the World Ocean Circulation Experiment SR1b section across the Antarctic Circumpolar Current

R/V Hespe ´rides occupied the World Ocean Circulation Experiment SR1b repeat section across the Scotia Sea in February 1995, February 1996, and February 1998. On each cruise the same set of 21 hydrographic stations with characteristic spacing <20 nautical miles was visited. The results of the thr...

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Published in:Journal of Geophysical Research
Main Authors: García, M., Bladé, I., Cruzado, A., Velásquez, Z., García, H., Puigdefàbregas, J., Sospedra, J.
Format: Book
Language:English
Published: 2002
Subjects:
Online Access:http://hdl.handle.net/1834/17142
https://doi.org/10.1029/2000JC000277
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spelling ftoceandocs:oai:aquadocs.org:1834/17142 2024-06-09T07:40:23+00:00 Observed variability of water properties and transports on the World Ocean Circulation Experiment SR1b section across the Antarctic Circumpolar Current García, M. Bladé, I. Cruzado, A. Velásquez, Z. García, H. Puigdefàbregas, J. Sospedra, J. 2002 pp.3162 http://hdl.handle.net/1834/17142 https://doi.org/10.1029/2000JC000277 en eng https://doi.org/10.1029/2000JC000277. http://hdl.handle.net/1834/17142 Journal Contribution Refereed 2002 ftoceandocs https://doi.org/10.1029/2000JC000277 2024-05-15T08:02:16Z R/V Hespe ´rides occupied the World Ocean Circulation Experiment SR1b repeat section across the Scotia Sea in February 1995, February 1996, and February 1998. On each cruise the same set of 21 hydrographic stations with characteristic spacing <20 nautical miles was visited. The results of the three surveys display a characteristic zonation of water masses in the region, which is defined by four hydrographic fronts. The net geostrophic transport of the Antarctic Circumpolar Current (ACC) across SR1b, computed with reference to the deepest common depth of each pair of adjacent stations, is similar in all three cruises, 144 Sv in February 1995, 131 Sv in February 1996, and 134 Sv in February 1998, and compares well with earlier computations of the ACC transport across Drake Passage. A close comparison of the vertical distributions of water properties on SR1b reveals changes in the structure of the ACC that are linked to undersampled current mesoscale activity, as suggested by infrared satellite images contemporary to the cruises. The most remarkable features are several ‘‘hydrographic discontinuities’’ observed in the Antarctic Zone south of the Southern ACC Front (SACCF), which are believed to be signatures of eddies produced east of the Shackleton Fracture Zone. The paper further addresses the different contribution of each ACC zonal band to the net geostrophic transport across SR1b on each Hespe ´rides occupation. Published Book Antarc* Antarctic Drake Passage Scotia Sea IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications Antarctic Drake Passage Scotia Sea Shackleton Shackleton Fracture Zone ENVELOPE(-60.000,-60.000,-60.000,-60.000) The Antarctic Journal of Geophysical Research 107 C10
institution Open Polar
collection IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
op_collection_id ftoceandocs
language English
description R/V Hespe ´rides occupied the World Ocean Circulation Experiment SR1b repeat section across the Scotia Sea in February 1995, February 1996, and February 1998. On each cruise the same set of 21 hydrographic stations with characteristic spacing <20 nautical miles was visited. The results of the three surveys display a characteristic zonation of water masses in the region, which is defined by four hydrographic fronts. The net geostrophic transport of the Antarctic Circumpolar Current (ACC) across SR1b, computed with reference to the deepest common depth of each pair of adjacent stations, is similar in all three cruises, 144 Sv in February 1995, 131 Sv in February 1996, and 134 Sv in February 1998, and compares well with earlier computations of the ACC transport across Drake Passage. A close comparison of the vertical distributions of water properties on SR1b reveals changes in the structure of the ACC that are linked to undersampled current mesoscale activity, as suggested by infrared satellite images contemporary to the cruises. The most remarkable features are several ‘‘hydrographic discontinuities’’ observed in the Antarctic Zone south of the Southern ACC Front (SACCF), which are believed to be signatures of eddies produced east of the Shackleton Fracture Zone. The paper further addresses the different contribution of each ACC zonal band to the net geostrophic transport across SR1b on each Hespe ´rides occupation. Published
format Book
author García, M.
Bladé, I.
Cruzado, A.
Velásquez, Z.
García, H.
Puigdefàbregas, J.
Sospedra, J.
spellingShingle García, M.
Bladé, I.
Cruzado, A.
Velásquez, Z.
García, H.
Puigdefàbregas, J.
Sospedra, J.
Observed variability of water properties and transports on the World Ocean Circulation Experiment SR1b section across the Antarctic Circumpolar Current
author_facet García, M.
Bladé, I.
Cruzado, A.
Velásquez, Z.
García, H.
Puigdefàbregas, J.
Sospedra, J.
author_sort García, M.
title Observed variability of water properties and transports on the World Ocean Circulation Experiment SR1b section across the Antarctic Circumpolar Current
title_short Observed variability of water properties and transports on the World Ocean Circulation Experiment SR1b section across the Antarctic Circumpolar Current
title_full Observed variability of water properties and transports on the World Ocean Circulation Experiment SR1b section across the Antarctic Circumpolar Current
title_fullStr Observed variability of water properties and transports on the World Ocean Circulation Experiment SR1b section across the Antarctic Circumpolar Current
title_full_unstemmed Observed variability of water properties and transports on the World Ocean Circulation Experiment SR1b section across the Antarctic Circumpolar Current
title_sort observed variability of water properties and transports on the world ocean circulation experiment sr1b section across the antarctic circumpolar current
publishDate 2002
url http://hdl.handle.net/1834/17142
https://doi.org/10.1029/2000JC000277
long_lat ENVELOPE(-60.000,-60.000,-60.000,-60.000)
geographic Antarctic
Drake Passage
Scotia Sea
Shackleton
Shackleton Fracture Zone
The Antarctic
geographic_facet Antarctic
Drake Passage
Scotia Sea
Shackleton
Shackleton Fracture Zone
The Antarctic
genre Antarc*
Antarctic
Drake Passage
Scotia Sea
genre_facet Antarc*
Antarctic
Drake Passage
Scotia Sea
op_relation https://doi.org/10.1029/2000JC000277.
http://hdl.handle.net/1834/17142
op_doi https://doi.org/10.1029/2000JC000277
container_title Journal of Geophysical Research
container_volume 107
container_issue C10
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