Near-bottom current direction inferred from comatulid crinoid feeding postures on the Terre Adélie and George V shelf, East Antarctica
For the first time, comatulid crinoid feeding behaviour is used to infer near-bottom current (NBC) directions on the Terre Adélie and George V shelf, East Antarctica. We analysed 47 still-image and video transects sampled during the Collaborative East Antarctic Marine Census (CEAMARC) expedition in...
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Online Access: | https://researchonline.jcu.edu.au/15411/1/ComatulidCurrents_Eleaume2011.pdf |
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ftjamescook:oai:researchonline.jcu.edu.au:15411 2024-02-11T09:56:41+01:00 Near-bottom current direction inferred from comatulid crinoid feeding postures on the Terre Adélie and George V shelf, East Antarctica Eléaume, Marc Beaman, Robin J. Griffiths, Huw J. Best, Ben Riddle, Martin J. Wadley, Victoria Rintoul, Stephen R. Hemery, Lenaïg G. Améziane, Nadia 2011-01 application/pdf https://researchonline.jcu.edu.au/15411/1/ComatulidCurrents_Eleaume2011.pdf unknown Elsevier http://dx.doi.org/10.1016/j.dsr2.2010.05.023 https://researchonline.jcu.edu.au/15411/ https://researchonline.jcu.edu.au/15411/1/ComatulidCurrents_Eleaume2011.pdf Eléaume, Marc, Beaman, Robin J., Griffiths, Huw J., Best, Ben, Riddle, Martin J., Wadley, Victoria, Rintoul, Stephen R., Hemery, Lenaïg G., and Améziane, Nadia (2011) Near-bottom current direction inferred from comatulid crinoid feeding postures on the Terre Adélie and George V shelf, East Antarctica. Deep-sea Research. Part II: topical studies in oceanography, 58 (1-2). pp. 163-169. restricted Article PeerReviewed 2011 ftjamescook https://doi.org/10.1016/j.dsr2.2010.05.023 2024-01-22T23:26:40Z For the first time, comatulid crinoid feeding behaviour is used to infer near-bottom current (NBC) directions on the Terre Adélie and George V shelf, East Antarctica. We analysed 47 still-image and video transects sampled during the Collaborative East Antarctic Marine Census (CEAMARC) expedition in 2007–2008. We recorded the inferred current direction from 1537 comatulid observations and interpolated these data across the shelf using the Natural Neighbour Interpolation (NNI) method. Results revealed a mode current directionality at each station and a close local agreement between the observed and interpolated NBC directions. The interpolated NBC directions show a coherent counter-clockwise gyre in the deep George V Basin, with a northward and westward flow over the northern flank of the basin and eastward flow near the coast, consistent with the distribution of bottom salinity. There also appears to be a clockwise gyre on the relatively shallow Adélie Bank, with an easterly or southeasterly flow along the outer-shelf, south and southwesterly on the east Adélie Bank, and westerly along the Terre Adélie coast. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica James Cook University, Australia: ResearchOnline@JCU Antarctic East Antarctica Terre Adélie ENVELOPE(139.000,139.000,-67.000,-67.000) Terre-Adélie ENVELOPE(138.991,138.991,-59.999,-59.999) Adélie Coast ENVELOPE(139.000,139.000,-60.000,-60.000) Deep Sea Research Part II: Topical Studies in Oceanography 58 1-2 163 169 |
institution |
Open Polar |
collection |
James Cook University, Australia: ResearchOnline@JCU |
op_collection_id |
ftjamescook |
language |
unknown |
description |
For the first time, comatulid crinoid feeding behaviour is used to infer near-bottom current (NBC) directions on the Terre Adélie and George V shelf, East Antarctica. We analysed 47 still-image and video transects sampled during the Collaborative East Antarctic Marine Census (CEAMARC) expedition in 2007–2008. We recorded the inferred current direction from 1537 comatulid observations and interpolated these data across the shelf using the Natural Neighbour Interpolation (NNI) method. Results revealed a mode current directionality at each station and a close local agreement between the observed and interpolated NBC directions. The interpolated NBC directions show a coherent counter-clockwise gyre in the deep George V Basin, with a northward and westward flow over the northern flank of the basin and eastward flow near the coast, consistent with the distribution of bottom salinity. There also appears to be a clockwise gyre on the relatively shallow Adélie Bank, with an easterly or southeasterly flow along the outer-shelf, south and southwesterly on the east Adélie Bank, and westerly along the Terre Adélie coast. |
format |
Article in Journal/Newspaper |
author |
Eléaume, Marc Beaman, Robin J. Griffiths, Huw J. Best, Ben Riddle, Martin J. Wadley, Victoria Rintoul, Stephen R. Hemery, Lenaïg G. Améziane, Nadia |
spellingShingle |
Eléaume, Marc Beaman, Robin J. Griffiths, Huw J. Best, Ben Riddle, Martin J. Wadley, Victoria Rintoul, Stephen R. Hemery, Lenaïg G. Améziane, Nadia Near-bottom current direction inferred from comatulid crinoid feeding postures on the Terre Adélie and George V shelf, East Antarctica |
author_facet |
Eléaume, Marc Beaman, Robin J. Griffiths, Huw J. Best, Ben Riddle, Martin J. Wadley, Victoria Rintoul, Stephen R. Hemery, Lenaïg G. Améziane, Nadia |
author_sort |
Eléaume, Marc |
title |
Near-bottom current direction inferred from comatulid crinoid feeding postures on the Terre Adélie and George V shelf, East Antarctica |
title_short |
Near-bottom current direction inferred from comatulid crinoid feeding postures on the Terre Adélie and George V shelf, East Antarctica |
title_full |
Near-bottom current direction inferred from comatulid crinoid feeding postures on the Terre Adélie and George V shelf, East Antarctica |
title_fullStr |
Near-bottom current direction inferred from comatulid crinoid feeding postures on the Terre Adélie and George V shelf, East Antarctica |
title_full_unstemmed |
Near-bottom current direction inferred from comatulid crinoid feeding postures on the Terre Adélie and George V shelf, East Antarctica |
title_sort |
near-bottom current direction inferred from comatulid crinoid feeding postures on the terre adélie and george v shelf, east antarctica |
publisher |
Elsevier |
publishDate |
2011 |
url |
https://researchonline.jcu.edu.au/15411/1/ComatulidCurrents_Eleaume2011.pdf |
long_lat |
ENVELOPE(139.000,139.000,-67.000,-67.000) ENVELOPE(138.991,138.991,-59.999,-59.999) ENVELOPE(139.000,139.000,-60.000,-60.000) |
geographic |
Antarctic East Antarctica Terre Adélie Terre-Adélie Adélie Coast |
geographic_facet |
Antarctic East Antarctica Terre Adélie Terre-Adélie Adélie Coast |
genre |
Antarc* Antarctic Antarctica East Antarctica |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica |
op_relation |
http://dx.doi.org/10.1016/j.dsr2.2010.05.023 https://researchonline.jcu.edu.au/15411/ https://researchonline.jcu.edu.au/15411/1/ComatulidCurrents_Eleaume2011.pdf Eléaume, Marc, Beaman, Robin J., Griffiths, Huw J., Best, Ben, Riddle, Martin J., Wadley, Victoria, Rintoul, Stephen R., Hemery, Lenaïg G., and Améziane, Nadia (2011) Near-bottom current direction inferred from comatulid crinoid feeding postures on the Terre Adélie and George V shelf, East Antarctica. Deep-sea Research. Part II: topical studies in oceanography, 58 (1-2). pp. 163-169. |
op_rights |
restricted |
op_doi |
https://doi.org/10.1016/j.dsr2.2010.05.023 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
58 |
container_issue |
1-2 |
container_start_page |
163 |
op_container_end_page |
169 |
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1790605070556987392 |