Krill transport in the Scotia Sea and environs
Abstract: Historical observations of the large-scale flow and frontal structure of the Antarctic Circumpolar Current in the Scotia Sea region were combined with the wind-induced surface Ekman transport to produce a composite flow field. This was usedwith a Lagrangianmodel to investigate transport of...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.506.9906 2023-05-15T13:45:53+02:00 Krill transport in the Scotia Sea and environs Eileen E. Hofmann John M. Klinck Ricardo A. Locarninii Bettina Fach The Pennsylvania State University CiteSeerX Archives 1998 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.506.9906 http://www.ims.metu.edu.tr/cv/Fach/PDF/S0954102098000492a.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.506.9906 http://www.ims.metu.edu.tr/cv/Fach/PDF/S0954102098000492a.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.ims.metu.edu.tr/cv/Fach/PDF/S0954102098000492a.pdf Key words Antarctic Circumpolar Current Antarctic krill transport Lagrangian models South Georgia text 1998 ftciteseerx 2016-01-08T09:25:28Z Abstract: Historical observations of the large-scale flow and frontal structure of the Antarctic Circumpolar Current in the Scotia Sea region were combined with the wind-induced surface Ekman transport to produce a composite flow field. This was usedwith a Lagrangianmodel to investigate transport ofAntarctic krill. Particle displacements from known krill spawning areas that result from surface Ekman drift, a composite large-scale flow, and the combination of the two were calculated. Surface Ekman drift alone only transports particles a few kilometres over the 150-day krill larval development time. The large-scale composite flow moves particles several hundreds of kilometres over the same time, suggesting this is the primary transport mechanism. An important contribution of the surface Ekman drift on particles released along the continental shelf break west of the Antarctic Peninsula is moving them north-northeast into the high-speed core of the southern Antarctic Circumpolar Current Front, which thentransports the particles to South Georgiain about 140-1 60 days. Similar particle displacement calculations using surface flow fields obtained from the Fine Resolution Antarctic Model do not show overall transport from the Antarctic Peninsula to South Georgia due to the inaccurate position of the southern Antarctic Circumpolar Current Front in the simulated circulation fields. The particle transit times obtained with the composite large-scale flow field are consistent with regional abundances of larval krill developmental stages collected in the Scotia Sea. These results strongly suggest that krill populations west of the Antarctic Peninsula provide the source for the krill populations found around South Georgia. Text Antarc* Antarctic Antarctic Krill Antarctic Peninsula Scotia Sea Unknown Antarctic Antarctic Peninsula Scotia Sea The Antarctic |
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English |
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Key words Antarctic Circumpolar Current Antarctic krill transport Lagrangian models South Georgia |
spellingShingle |
Key words Antarctic Circumpolar Current Antarctic krill transport Lagrangian models South Georgia Eileen E. Hofmann John M. Klinck Ricardo A. Locarninii Bettina Fach Krill transport in the Scotia Sea and environs |
topic_facet |
Key words Antarctic Circumpolar Current Antarctic krill transport Lagrangian models South Georgia |
description |
Abstract: Historical observations of the large-scale flow and frontal structure of the Antarctic Circumpolar Current in the Scotia Sea region were combined with the wind-induced surface Ekman transport to produce a composite flow field. This was usedwith a Lagrangianmodel to investigate transport ofAntarctic krill. Particle displacements from known krill spawning areas that result from surface Ekman drift, a composite large-scale flow, and the combination of the two were calculated. Surface Ekman drift alone only transports particles a few kilometres over the 150-day krill larval development time. The large-scale composite flow moves particles several hundreds of kilometres over the same time, suggesting this is the primary transport mechanism. An important contribution of the surface Ekman drift on particles released along the continental shelf break west of the Antarctic Peninsula is moving them north-northeast into the high-speed core of the southern Antarctic Circumpolar Current Front, which thentransports the particles to South Georgiain about 140-1 60 days. Similar particle displacement calculations using surface flow fields obtained from the Fine Resolution Antarctic Model do not show overall transport from the Antarctic Peninsula to South Georgia due to the inaccurate position of the southern Antarctic Circumpolar Current Front in the simulated circulation fields. The particle transit times obtained with the composite large-scale flow field are consistent with regional abundances of larval krill developmental stages collected in the Scotia Sea. These results strongly suggest that krill populations west of the Antarctic Peninsula provide the source for the krill populations found around South Georgia. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Eileen E. Hofmann John M. Klinck Ricardo A. Locarninii Bettina Fach |
author_facet |
Eileen E. Hofmann John M. Klinck Ricardo A. Locarninii Bettina Fach |
author_sort |
Eileen E. Hofmann |
title |
Krill transport in the Scotia Sea and environs |
title_short |
Krill transport in the Scotia Sea and environs |
title_full |
Krill transport in the Scotia Sea and environs |
title_fullStr |
Krill transport in the Scotia Sea and environs |
title_full_unstemmed |
Krill transport in the Scotia Sea and environs |
title_sort |
krill transport in the scotia sea and environs |
publishDate |
1998 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.506.9906 http://www.ims.metu.edu.tr/cv/Fach/PDF/S0954102098000492a.pdf |
geographic |
Antarctic Antarctic Peninsula Scotia Sea The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Scotia Sea The Antarctic |
genre |
Antarc* Antarctic Antarctic Krill Antarctic Peninsula Scotia Sea |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctic Peninsula Scotia Sea |
op_source |
http://www.ims.metu.edu.tr/cv/Fach/PDF/S0954102098000492a.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.506.9906 http://www.ims.metu.edu.tr/cv/Fach/PDF/S0954102098000492a.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766232015945859072 |