oxygen isotope ratio measurements
Abstract. Melt water from the floating ice shelves at the margins of the southeastern Weddell Sea makes a significant contribution to the fresh water budget of the region. In February 2005 a multi-institution team conducted an oceanographic campaign at Fimbul Ice Shelf on the Greenwich Meridian as p...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.382.8112 2023-05-15T16:13:14+02:00 oxygen isotope ratio measurements M. R. Price K. J. Heywood K. W. Nicholls The Pennsylvania State University CiteSeerX Archives 2007 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.382.8112 http://hal.archives-ouvertes.fr/docs/00/29/83/57/PDF/os-4-89-2008.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.382.8112 http://hal.archives-ouvertes.fr/docs/00/29/83/57/PDF/os-4-89-2008.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://hal.archives-ouvertes.fr/docs/00/29/83/57/PDF/os-4-89-2008.pdf text 2007 ftciteseerx 2016-09-18T00:26:48Z Abstract. Melt water from the floating ice shelves at the margins of the southeastern Weddell Sea makes a significant contribution to the fresh water budget of the region. In February 2005 a multi-institution team conducted an oceanographic campaign at Fimbul Ice Shelf on the Greenwich Meridian as part of the Autosub Under Ice programme. This included a mission of the autonomous submarine Autosub 25 km into the cavity beneath Fimbul Ice Shelf, and a number of ship-based hydrographic sections on the continental shelf and adjacent to the ice shelf front. The measurements reveal two significant sources of glacial melt water at Fimbul Ice Shelf: the main cavity under the ice shelf and an ice tongue, Trolltunga, that protrudes from the main ice front and out over the continental slope into deep water. Glacial melt water is concentrated in a 200 m thick Ice Shelf Water (ISW) layer below the base of the ice shelf at 150–200 m, with a maximum glacial melt concentration of up to 1.16%. Some glacial melt is found throughout the water column, and much of this is from sources other than Fimbul Ice Shelf. However, at least 0.2 % of the water in the ISW layer cannot be accounted for by other processes and must have been contributed by the ice shelf. Just downstream of Fimbul Ice Shelf we observe locally created ISW mixing out across the continental slope. The ISW formed here is much less dense than that formed in the southwest Weddell Sea, and will ultimately contribute a freshening (and reduction in δ 18 O) to the upper 100–150 m of the water column in the southeast Text Fimbul Ice Shelf Ice Shelf Ice Shelves Weddell Sea Unknown Fimbul Ice Shelf ENVELOPE(-0.500,-0.500,-70.750,-70.750) Greenwich Trolltunga ENVELOPE(-0.500,-0.500,-69.500,-69.500) Weddell Weddell Sea |
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Open Polar |
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Unknown |
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ftciteseerx |
language |
English |
description |
Abstract. Melt water from the floating ice shelves at the margins of the southeastern Weddell Sea makes a significant contribution to the fresh water budget of the region. In February 2005 a multi-institution team conducted an oceanographic campaign at Fimbul Ice Shelf on the Greenwich Meridian as part of the Autosub Under Ice programme. This included a mission of the autonomous submarine Autosub 25 km into the cavity beneath Fimbul Ice Shelf, and a number of ship-based hydrographic sections on the continental shelf and adjacent to the ice shelf front. The measurements reveal two significant sources of glacial melt water at Fimbul Ice Shelf: the main cavity under the ice shelf and an ice tongue, Trolltunga, that protrudes from the main ice front and out over the continental slope into deep water. Glacial melt water is concentrated in a 200 m thick Ice Shelf Water (ISW) layer below the base of the ice shelf at 150–200 m, with a maximum glacial melt concentration of up to 1.16%. Some glacial melt is found throughout the water column, and much of this is from sources other than Fimbul Ice Shelf. However, at least 0.2 % of the water in the ISW layer cannot be accounted for by other processes and must have been contributed by the ice shelf. Just downstream of Fimbul Ice Shelf we observe locally created ISW mixing out across the continental slope. The ISW formed here is much less dense than that formed in the southwest Weddell Sea, and will ultimately contribute a freshening (and reduction in δ 18 O) to the upper 100–150 m of the water column in the southeast |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
M. R. Price K. J. Heywood K. W. Nicholls |
spellingShingle |
M. R. Price K. J. Heywood K. W. Nicholls oxygen isotope ratio measurements |
author_facet |
M. R. Price K. J. Heywood K. W. Nicholls |
author_sort |
M. R. Price |
title |
oxygen isotope ratio measurements |
title_short |
oxygen isotope ratio measurements |
title_full |
oxygen isotope ratio measurements |
title_fullStr |
oxygen isotope ratio measurements |
title_full_unstemmed |
oxygen isotope ratio measurements |
title_sort |
oxygen isotope ratio measurements |
publishDate |
2007 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.382.8112 http://hal.archives-ouvertes.fr/docs/00/29/83/57/PDF/os-4-89-2008.pdf |
long_lat |
ENVELOPE(-0.500,-0.500,-70.750,-70.750) ENVELOPE(-0.500,-0.500,-69.500,-69.500) |
geographic |
Fimbul Ice Shelf Greenwich Trolltunga Weddell Weddell Sea |
geographic_facet |
Fimbul Ice Shelf Greenwich Trolltunga Weddell Weddell Sea |
genre |
Fimbul Ice Shelf Ice Shelf Ice Shelves Weddell Sea |
genre_facet |
Fimbul Ice Shelf Ice Shelf Ice Shelves Weddell Sea |
op_source |
http://hal.archives-ouvertes.fr/docs/00/29/83/57/PDF/os-4-89-2008.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.382.8112 http://hal.archives-ouvertes.fr/docs/00/29/83/57/PDF/os-4-89-2008.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1765998892278611968 |