Sea-ice / ice-shelf interaction in the eastern Weddell Sea
Basal melt of ice shelves leads to an accumulation of disc-shaped ice platelets (platelet layer) beneath a nearby sea-ice cover. Here we present the seasonal cycle of fast ice attached to the Ekström Ice Shelf and the underlying platelet layer in 2012. Ice platelets emerge from the cavity and intera...
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ftawi:oai:epic.awi.de:35370 2023-05-15T16:41:51+02:00 Sea-ice / ice-shelf interaction in the eastern Weddell Sea Hoppmann, Mario Nicolaus, Marcel Hunkeler, Priska Paul, Stephan Boebel, Olaf 2014 application/pdf https://epic.awi.de/id/eprint/35370/ https://epic.awi.de/id/eprint/35370/1/IGS_hoppmann.pdf https://hdl.handle.net/10013/epic.43362 https://hdl.handle.net/10013/epic.43362.d001 unknown https://epic.awi.de/id/eprint/35370/1/IGS_hoppmann.pdf https://hdl.handle.net/10013/epic.43362.d001 Hoppmann, M. orcid:0000-0003-1294-9531 , Nicolaus, M. orcid:0000-0003-0903-1746 , Hunkeler, P. , Paul, S. and Boebel, O. orcid:0000-0002-2259-0035 (2014) Sea-ice / ice-shelf interaction in the eastern Weddell Sea , International Symposium on Sea Ice in a Changing Environment, Hobart (Tasmania, Australia), 10 March 2014 - 14 March 2014 . hdl:10013/epic.43362 EPIC3International Symposium on Sea Ice in a Changing Environment, Hobart (Tasmania, Australia), 2014-03-10-2014-03-14 Conference notRev 2014 ftawi 2021-12-24T15:39:29Z Basal melt of ice shelves leads to an accumulation of disc-shaped ice platelets (platelet layer) beneath a nearby sea-ice cover. Here we present the seasonal cycle of fast ice attached to the Ekström Ice Shelf and the underlying platelet layer in 2012. Ice platelets emerge from the cavity and interact with the fast-ice cover of Atka Bay as early as June. Episodic accumulations throughout the winter lead to an average platelet-layer thickness of 4 m in December, with local extrema of 10 m. The additional buoyancy partly prevents surface flooding and snow-ice formation despite a thick snow cover. Subsequent thinning of the platelet layer in December is associated with an inflow of warm water masses. The combination of model studies with observed fast-ice thickness reveals an average ice-volume fraction in the platelet layer of 0.26. We �nd that nearly half of the combined solid sea-ice and ice-platelet volume in this area is generated by heat loss to the ocean rather than to the atmosphere. The total ice-platelet volume underlying Atka Bay fast ice is equivalent to more than one �fth of the annual basal melt volume under the Ekström Ice Shelf. Conference Object Ice Shelf Ice Shelves Sea ice Weddell Sea Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Atka ENVELOPE(151.789,151.789,60.835,60.835) Ekström Ice Shelf ENVELOPE(-8.000,-8.000,-71.000,-71.000) Weddell Weddell Sea |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Basal melt of ice shelves leads to an accumulation of disc-shaped ice platelets (platelet layer) beneath a nearby sea-ice cover. Here we present the seasonal cycle of fast ice attached to the Ekström Ice Shelf and the underlying platelet layer in 2012. Ice platelets emerge from the cavity and interact with the fast-ice cover of Atka Bay as early as June. Episodic accumulations throughout the winter lead to an average platelet-layer thickness of 4 m in December, with local extrema of 10 m. The additional buoyancy partly prevents surface flooding and snow-ice formation despite a thick snow cover. Subsequent thinning of the platelet layer in December is associated with an inflow of warm water masses. The combination of model studies with observed fast-ice thickness reveals an average ice-volume fraction in the platelet layer of 0.26. We �nd that nearly half of the combined solid sea-ice and ice-platelet volume in this area is generated by heat loss to the ocean rather than to the atmosphere. The total ice-platelet volume underlying Atka Bay fast ice is equivalent to more than one �fth of the annual basal melt volume under the Ekström Ice Shelf. |
format |
Conference Object |
author |
Hoppmann, Mario Nicolaus, Marcel Hunkeler, Priska Paul, Stephan Boebel, Olaf |
spellingShingle |
Hoppmann, Mario Nicolaus, Marcel Hunkeler, Priska Paul, Stephan Boebel, Olaf Sea-ice / ice-shelf interaction in the eastern Weddell Sea |
author_facet |
Hoppmann, Mario Nicolaus, Marcel Hunkeler, Priska Paul, Stephan Boebel, Olaf |
author_sort |
Hoppmann, Mario |
title |
Sea-ice / ice-shelf interaction in the eastern Weddell Sea |
title_short |
Sea-ice / ice-shelf interaction in the eastern Weddell Sea |
title_full |
Sea-ice / ice-shelf interaction in the eastern Weddell Sea |
title_fullStr |
Sea-ice / ice-shelf interaction in the eastern Weddell Sea |
title_full_unstemmed |
Sea-ice / ice-shelf interaction in the eastern Weddell Sea |
title_sort |
sea-ice / ice-shelf interaction in the eastern weddell sea |
publishDate |
2014 |
url |
https://epic.awi.de/id/eprint/35370/ https://epic.awi.de/id/eprint/35370/1/IGS_hoppmann.pdf https://hdl.handle.net/10013/epic.43362 https://hdl.handle.net/10013/epic.43362.d001 |
long_lat |
ENVELOPE(151.789,151.789,60.835,60.835) ENVELOPE(-8.000,-8.000,-71.000,-71.000) |
geographic |
Atka Ekström Ice Shelf Weddell Weddell Sea |
geographic_facet |
Atka Ekström Ice Shelf Weddell Weddell Sea |
genre |
Ice Shelf Ice Shelves Sea ice Weddell Sea |
genre_facet |
Ice Shelf Ice Shelves Sea ice Weddell Sea |
op_source |
EPIC3International Symposium on Sea Ice in a Changing Environment, Hobart (Tasmania, Australia), 2014-03-10-2014-03-14 |
op_relation |
https://epic.awi.de/id/eprint/35370/1/IGS_hoppmann.pdf https://hdl.handle.net/10013/epic.43362.d001 Hoppmann, M. orcid:0000-0003-1294-9531 , Nicolaus, M. orcid:0000-0003-0903-1746 , Hunkeler, P. , Paul, S. and Boebel, O. orcid:0000-0002-2259-0035 (2014) Sea-ice / ice-shelf interaction in the eastern Weddell Sea , International Symposium on Sea Ice in a Changing Environment, Hobart (Tasmania, Australia), 10 March 2014 - 14 March 2014 . hdl:10013/epic.43362 |
_version_ |
1766032319191187456 |