Biological modification of carbonate chemistry in dense water outflows from the Mertz Polynya, East Antarctica
Polynyas, areas of open water with in the sea-ice pack, are often biologically productive, and are sites of enhanced airsea exchange. The Mertz polynya is formed in East Antarctica by persistent katabatic winds and an ice barrier created by the Mertz Glacier Tongue. The region plays a significant ro...
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ftunivtasecite:oai:ecite.utas.edu.au:96903 2023-05-15T13:37:24+02:00 Biological modification of carbonate chemistry in dense water outflows from the Mertz Polynya, East Antarctica Shadwick, EH Tilbrook, BD Williams, GD Rintoul, SR 2014 http://ecite.utas.edu.au/96903 en eng International Glaciological Society Shadwick, EH and Tilbrook, BD and Williams, GD and Rintoul, SR, Biological modification of carbonate chemistry in dense water outflows from the Mertz Polynya, East Antarctica, International Symposium on Sea Ice in a Changing Environment - Proceedings of the Hobart Symposium, 10-14 March 2014, Hobart, Tasmania, Australia, pp. 69A778. (2014) [Conference Extract] http://ecite.utas.edu.au/96903 Earth Sciences Oceanography Chemical Oceanography Conference Extract NonPeerReviewed 2014 ftunivtasecite 2019-12-13T21:59:08Z Polynyas, areas of open water with in the sea-ice pack, are often biologically productive, and are sites of enhanced airsea exchange. The Mertz polynya is formed in East Antarctica by persistent katabatic winds and an ice barrier created by the Mertz Glacier Tongue. The region plays a significant role in the formation of dense shelf water (DSW) primarily due to salt rejection during intense sea-ice formation. Physical and biogeochemical observations indicate that primary production over the shelf in spring/summer preconditions the dense water outflows, supplying both organic material, and water depleted in CO2, to coral and sponge communities on the continental slope. The formation and export of DSW also plays a role in the transfer of anthropogenic CO2 to the deep ocean. In February 2010 a large piece of ice (~70 km long and ~35 km wide) calved from the Mertz Glacier Tongue, dramatically changing the regional fast-ice and pack-ice distributions. The physical and biogeochemical consequences of this event (based on observations pre- and post-calving) included significant surface freshening, a twofold enhancement of biological production, and an increase in the carbonate saturation state. Conference Object Antarc* Antarctica East Antarctica ice pack Mertz Glacier Sea ice eCite UTAS (University of Tasmania) East Antarctica Mertz Glacier ENVELOPE(144.500,144.500,-67.667,-67.667) Mertz Glacier Tongue ENVELOPE(145.500,145.500,-67.167,-67.167) |
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Open Polar |
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eCite UTAS (University of Tasmania) |
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ftunivtasecite |
language |
English |
topic |
Earth Sciences Oceanography Chemical Oceanography |
spellingShingle |
Earth Sciences Oceanography Chemical Oceanography Shadwick, EH Tilbrook, BD Williams, GD Rintoul, SR Biological modification of carbonate chemistry in dense water outflows from the Mertz Polynya, East Antarctica |
topic_facet |
Earth Sciences Oceanography Chemical Oceanography |
description |
Polynyas, areas of open water with in the sea-ice pack, are often biologically productive, and are sites of enhanced airsea exchange. The Mertz polynya is formed in East Antarctica by persistent katabatic winds and an ice barrier created by the Mertz Glacier Tongue. The region plays a significant role in the formation of dense shelf water (DSW) primarily due to salt rejection during intense sea-ice formation. Physical and biogeochemical observations indicate that primary production over the shelf in spring/summer preconditions the dense water outflows, supplying both organic material, and water depleted in CO2, to coral and sponge communities on the continental slope. The formation and export of DSW also plays a role in the transfer of anthropogenic CO2 to the deep ocean. In February 2010 a large piece of ice (~70 km long and ~35 km wide) calved from the Mertz Glacier Tongue, dramatically changing the regional fast-ice and pack-ice distributions. The physical and biogeochemical consequences of this event (based on observations pre- and post-calving) included significant surface freshening, a twofold enhancement of biological production, and an increase in the carbonate saturation state. |
format |
Conference Object |
author |
Shadwick, EH Tilbrook, BD Williams, GD Rintoul, SR |
author_facet |
Shadwick, EH Tilbrook, BD Williams, GD Rintoul, SR |
author_sort |
Shadwick, EH |
title |
Biological modification of carbonate chemistry in dense water outflows from the Mertz Polynya, East Antarctica |
title_short |
Biological modification of carbonate chemistry in dense water outflows from the Mertz Polynya, East Antarctica |
title_full |
Biological modification of carbonate chemistry in dense water outflows from the Mertz Polynya, East Antarctica |
title_fullStr |
Biological modification of carbonate chemistry in dense water outflows from the Mertz Polynya, East Antarctica |
title_full_unstemmed |
Biological modification of carbonate chemistry in dense water outflows from the Mertz Polynya, East Antarctica |
title_sort |
biological modification of carbonate chemistry in dense water outflows from the mertz polynya, east antarctica |
publisher |
International Glaciological Society |
publishDate |
2014 |
url |
http://ecite.utas.edu.au/96903 |
long_lat |
ENVELOPE(144.500,144.500,-67.667,-67.667) ENVELOPE(145.500,145.500,-67.167,-67.167) |
geographic |
East Antarctica Mertz Glacier Mertz Glacier Tongue |
geographic_facet |
East Antarctica Mertz Glacier Mertz Glacier Tongue |
genre |
Antarc* Antarctica East Antarctica ice pack Mertz Glacier Sea ice |
genre_facet |
Antarc* Antarctica East Antarctica ice pack Mertz Glacier Sea ice |
op_relation |
Shadwick, EH and Tilbrook, BD and Williams, GD and Rintoul, SR, Biological modification of carbonate chemistry in dense water outflows from the Mertz Polynya, East Antarctica, International Symposium on Sea Ice in a Changing Environment - Proceedings of the Hobart Symposium, 10-14 March 2014, Hobart, Tasmania, Australia, pp. 69A778. (2014) [Conference Extract] http://ecite.utas.edu.au/96903 |
_version_ |
1766091427551379456 |