Field measurements on Atka Bay landfast sea ice in 2012
Basal melt of ice shelves may lead to an accumulation of disc-shaped ice platelets underneath nearby sea ice, to form a sub-ice platelet layer. Here we present the seasonal cycle of sea ice attached to the Ekström Ice Shelf, Antarctica, and the underlying platelet layer in 2012. Ice platelets emerge...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.824434 2023-05-15T13:29:45+02:00 Field measurements on Atka Bay landfast sea ice in 2012 Hoppmann, Mario Nicolaus, Marcel Paul, Stephan Hunkeler, Priska A Heinemann, Günther Willmes, Sascha Timmermann, Ralph Boebel, Olaf Schmidt, Thomas Kühnel, Meike König-Langlo, Gert Gerdes, Rüdiger MEDIAN LATITUDE: -70.611257 * MEDIAN LONGITUDE: -8.046926 * SOUTH-BOUND LATITUDE: -70.650000 * WEST-BOUND LONGITUDE: -8.250000 * NORTH-BOUND LATITUDE: -70.575330 * EAST-BOUND LONGITUDE: -7.482580 * DATE/TIME START: 2012-01-01T09:09:00 * DATE/TIME END: 2013-01-30T13:00:00 2014-11-20 application/zip, 5 datasets https://doi.pangaea.de/10.1594/PANGAEA.824434 https://doi.org/10.1594/PANGAEA.824434 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.824434 https://doi.org/10.1594/PANGAEA.824434 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Hoppmann, Mario; Nicolaus, Marcel; Paul, Stephan; Hunkeler, Priska A; Heinemann, Günther; Willmes, Sascha; Timmermann, Ralph; Boebel, Olaf; Schmidt, Thomas; Kühnel, Meike; König-Langlo, Gert; Gerdes, Rüdiger (2015): Ice platelets below Weddell Sea landfast sea ice. Annals of Glaciology, 56(69), 175-190, https://doi.org/10.3189/2015AoG69A678 AWI_SeaIce Sea Ice Physics @ AWI Dataset 2014 ftpangaea https://doi.org/10.1594/PANGAEA.824434 https://doi.org/10.3189/2015AoG69A678 2023-01-20T07:33:12Z Basal melt of ice shelves may lead to an accumulation of disc-shaped ice platelets underneath nearby sea ice, to form a sub-ice platelet layer. Here we present the seasonal cycle of sea ice attached to the Ekström Ice Shelf, Antarctica, and the underlying platelet layer in 2012. Ice platelets emerged from the cavity and interacted with the fast-ice cover of Atka Bay as early as June. Episodic accumulations throughout winter and spring led to an average platelet-layer thickness of 4 m by December 2012, with local maxima of up to 10 m. The additional buoyancy partly prevented surface flooding and snow-ice formation, despite a thick snow cover. Subsequent thinning of the platelet layer from December onwards was associated with an inflow of warm surface water. The combination of model studies with observed fast-ice thickness revealed an average ice-volume fraction in the platelet layer of 0.25 +/- 0.1. We found that nearly half of the combined solid sea-ice and ice-platelet volume in this area is generated by heat transfer to the ocean rather than to the atmosphere. The total ice-platelet volume underlying Atka Bay fast ice was equivalent to more than one-fifth of the annual basal melt volume under the Ekström Ice Shelf. Dataset Annals of Glaciology Antarc* Antarctica Ice Shelf Ice Shelves Sea ice PANGAEA - Data Publisher for Earth & Environmental Science Atka ENVELOPE(151.789,151.789,60.835,60.835) Ekström Ice Shelf ENVELOPE(-8.000,-8.000,-71.000,-71.000) ENVELOPE(-8.250000,-7.482580,-70.575330,-70.650000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
AWI_SeaIce Sea Ice Physics @ AWI |
spellingShingle |
AWI_SeaIce Sea Ice Physics @ AWI Hoppmann, Mario Nicolaus, Marcel Paul, Stephan Hunkeler, Priska A Heinemann, Günther Willmes, Sascha Timmermann, Ralph Boebel, Olaf Schmidt, Thomas Kühnel, Meike König-Langlo, Gert Gerdes, Rüdiger Field measurements on Atka Bay landfast sea ice in 2012 |
topic_facet |
AWI_SeaIce Sea Ice Physics @ AWI |
description |
Basal melt of ice shelves may lead to an accumulation of disc-shaped ice platelets underneath nearby sea ice, to form a sub-ice platelet layer. Here we present the seasonal cycle of sea ice attached to the Ekström Ice Shelf, Antarctica, and the underlying platelet layer in 2012. Ice platelets emerged from the cavity and interacted with the fast-ice cover of Atka Bay as early as June. Episodic accumulations throughout winter and spring led to an average platelet-layer thickness of 4 m by December 2012, with local maxima of up to 10 m. The additional buoyancy partly prevented surface flooding and snow-ice formation, despite a thick snow cover. Subsequent thinning of the platelet layer from December onwards was associated with an inflow of warm surface water. The combination of model studies with observed fast-ice thickness revealed an average ice-volume fraction in the platelet layer of 0.25 +/- 0.1. We found that nearly half of the combined solid sea-ice and ice-platelet volume in this area is generated by heat transfer to the ocean rather than to the atmosphere. The total ice-platelet volume underlying Atka Bay fast ice was equivalent to more than one-fifth of the annual basal melt volume under the Ekström Ice Shelf. |
format |
Dataset |
author |
Hoppmann, Mario Nicolaus, Marcel Paul, Stephan Hunkeler, Priska A Heinemann, Günther Willmes, Sascha Timmermann, Ralph Boebel, Olaf Schmidt, Thomas Kühnel, Meike König-Langlo, Gert Gerdes, Rüdiger |
author_facet |
Hoppmann, Mario Nicolaus, Marcel Paul, Stephan Hunkeler, Priska A Heinemann, Günther Willmes, Sascha Timmermann, Ralph Boebel, Olaf Schmidt, Thomas Kühnel, Meike König-Langlo, Gert Gerdes, Rüdiger |
author_sort |
Hoppmann, Mario |
title |
Field measurements on Atka Bay landfast sea ice in 2012 |
title_short |
Field measurements on Atka Bay landfast sea ice in 2012 |
title_full |
Field measurements on Atka Bay landfast sea ice in 2012 |
title_fullStr |
Field measurements on Atka Bay landfast sea ice in 2012 |
title_full_unstemmed |
Field measurements on Atka Bay landfast sea ice in 2012 |
title_sort |
field measurements on atka bay landfast sea ice in 2012 |
publisher |
PANGAEA |
publishDate |
2014 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.824434 https://doi.org/10.1594/PANGAEA.824434 |
op_coverage |
MEDIAN LATITUDE: -70.611257 * MEDIAN LONGITUDE: -8.046926 * SOUTH-BOUND LATITUDE: -70.650000 * WEST-BOUND LONGITUDE: -8.250000 * NORTH-BOUND LATITUDE: -70.575330 * EAST-BOUND LONGITUDE: -7.482580 * DATE/TIME START: 2012-01-01T09:09:00 * DATE/TIME END: 2013-01-30T13:00:00 |
long_lat |
ENVELOPE(151.789,151.789,60.835,60.835) ENVELOPE(-8.000,-8.000,-71.000,-71.000) ENVELOPE(-8.250000,-7.482580,-70.575330,-70.650000) |
geographic |
Atka Ekström Ice Shelf |
geographic_facet |
Atka Ekström Ice Shelf |
genre |
Annals of Glaciology Antarc* Antarctica Ice Shelf Ice Shelves Sea ice |
genre_facet |
Annals of Glaciology Antarc* Antarctica Ice Shelf Ice Shelves Sea ice |
op_source |
Supplement to: Hoppmann, Mario; Nicolaus, Marcel; Paul, Stephan; Hunkeler, Priska A; Heinemann, Günther; Willmes, Sascha; Timmermann, Ralph; Boebel, Olaf; Schmidt, Thomas; Kühnel, Meike; König-Langlo, Gert; Gerdes, Rüdiger (2015): Ice platelets below Weddell Sea landfast sea ice. Annals of Glaciology, 56(69), 175-190, https://doi.org/10.3189/2015AoG69A678 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.824434 https://doi.org/10.1594/PANGAEA.824434 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.824434 https://doi.org/10.3189/2015AoG69A678 |
_version_ |
1766002599681589248 |