Field measurements of the atmosphere, ocean, sea ice and sub-ice platelet layer at Atka Bay in 2013
Ice shelves strongly interact with coastal Antarctic sea ice and the associated ecosystem by creating conditions favourable to the formation of a sub-ice platelet layer. The close investigation of this phenomenon and its seasonal evolution remain a challenge due to logistical constraints and a lack...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.833978 2023-05-15T13:42:11+02:00 Field measurements of the atmosphere, ocean, sea ice and sub-ice platelet layer at Atka Bay in 2013 Hoppmann, Mario Nicolaus, Marcel Hunkeler, Priska A König-Langlo, Gert MEDIAN LATITUDE: -70.599511 * MEDIAN LONGITUDE: -8.066127 * SOUTH-BOUND LATITUDE: -70.650000 * WEST-BOUND LONGITUDE: -8.250000 * NORTH-BOUND LATITUDE: -70.575220 * EAST-BOUND LONGITUDE: -7.482580 * DATE/TIME START: 2012-11-22T04:00:00 * DATE/TIME END: 2014-02-09T21:06:00 2015-07-14 application/zip, 7 datasets https://doi.pangaea.de/10.1594/PANGAEA.833978 https://doi.org/10.1594/PANGAEA.833978 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.833978 https://doi.org/10.1594/PANGAEA.833978 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; Hunkeler, Priska A; Heil, Petra; Behrens, Lisa K; König-Langlo, Gert; Gerdes, Rüdiger (2015): Seasonal evolution of an ice-shelf influenced fast-ice regime, derived from an autonomous thermistor chain. Journal of Geophysical Research: Oceans, 120(3), 1703-1724, https://doi.org/10.1002/2014JC010327 AWI_SeaIce Sea Ice Physics @ AWI Dataset 2015 ftpangaea https://doi.org/10.1594/PANGAEA.833978 https://doi.org/10.1002/2014JC010327 2023-01-20T07:33:18Z Ice shelves strongly interact with coastal Antarctic sea ice and the associated ecosystem by creating conditions favourable to the formation of a sub-ice platelet layer. The close investigation of this phenomenon and its seasonal evolution remain a challenge due to logistical constraints and a lack of suitable methodology. In this study, we characterize the seasonal cycle of Antarctic fast ice adjacent to the Ekström Ice Shelf in the eastern Weddell Sea. We used a thermistor chain with the additional ability to record the temperature response induced by cyclic heating of resistors embedded in the chain. Vertical sea-ice temperature and heating profiles obtained daily between November 2012 and February 2014 were analyzed to determine sea-ice and snow evolution, and to calculate the basal energy budget. The residual heat flux translated into an ice-volume fraction in the platelet layer of 0.18 ± 0.09, which we reproduced by a independent model simulation and agrees with earlier results. Manual drillings revealed an average annual platelet-layer thickness increase of at least 4m, and an annual maximum thickness of 10m beneath second-year sea ice. The oceanic contribution dominated the total sea-ice production during the study, effectively accounting for up to 70% of second-year sea-ice growth. In summer, an oceanic heat flux of 21 W/m**2 led to a partial thinning of the platelet layer. Our results further show that the active heating method, in contrast to the acoustic sounding approach, is well suited to derive the fast-ice mass balance in regions influenced by ocean/ice-shelf interaction, as it allows sub-diurnal monitoring of the platelet-layer thickness. Dataset Antarc* Antarctic Ice Shelf Ice Shelves Sea ice Weddell Sea PANGAEA - Data Publisher for Earth & Environmental Science Antarctic 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 ENVELOPE(-8.250000,-7.482580,-70.575220,-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 Hunkeler, Priska A König-Langlo, Gert Field measurements of the atmosphere, ocean, sea ice and sub-ice platelet layer at Atka Bay in 2013 |
topic_facet |
AWI_SeaIce Sea Ice Physics @ AWI |
description |
Ice shelves strongly interact with coastal Antarctic sea ice and the associated ecosystem by creating conditions favourable to the formation of a sub-ice platelet layer. The close investigation of this phenomenon and its seasonal evolution remain a challenge due to logistical constraints and a lack of suitable methodology. In this study, we characterize the seasonal cycle of Antarctic fast ice adjacent to the Ekström Ice Shelf in the eastern Weddell Sea. We used a thermistor chain with the additional ability to record the temperature response induced by cyclic heating of resistors embedded in the chain. Vertical sea-ice temperature and heating profiles obtained daily between November 2012 and February 2014 were analyzed to determine sea-ice and snow evolution, and to calculate the basal energy budget. The residual heat flux translated into an ice-volume fraction in the platelet layer of 0.18 ± 0.09, which we reproduced by a independent model simulation and agrees with earlier results. Manual drillings revealed an average annual platelet-layer thickness increase of at least 4m, and an annual maximum thickness of 10m beneath second-year sea ice. The oceanic contribution dominated the total sea-ice production during the study, effectively accounting for up to 70% of second-year sea-ice growth. In summer, an oceanic heat flux of 21 W/m**2 led to a partial thinning of the platelet layer. Our results further show that the active heating method, in contrast to the acoustic sounding approach, is well suited to derive the fast-ice mass balance in regions influenced by ocean/ice-shelf interaction, as it allows sub-diurnal monitoring of the platelet-layer thickness. |
format |
Dataset |
author |
Hoppmann, Mario Nicolaus, Marcel Hunkeler, Priska A König-Langlo, Gert |
author_facet |
Hoppmann, Mario Nicolaus, Marcel Hunkeler, Priska A König-Langlo, Gert |
author_sort |
Hoppmann, Mario |
title |
Field measurements of the atmosphere, ocean, sea ice and sub-ice platelet layer at Atka Bay in 2013 |
title_short |
Field measurements of the atmosphere, ocean, sea ice and sub-ice platelet layer at Atka Bay in 2013 |
title_full |
Field measurements of the atmosphere, ocean, sea ice and sub-ice platelet layer at Atka Bay in 2013 |
title_fullStr |
Field measurements of the atmosphere, ocean, sea ice and sub-ice platelet layer at Atka Bay in 2013 |
title_full_unstemmed |
Field measurements of the atmosphere, ocean, sea ice and sub-ice platelet layer at Atka Bay in 2013 |
title_sort |
field measurements of the atmosphere, ocean, sea ice and sub-ice platelet layer at atka bay in 2013 |
publisher |
PANGAEA |
publishDate |
2015 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.833978 https://doi.org/10.1594/PANGAEA.833978 |
op_coverage |
MEDIAN LATITUDE: -70.599511 * MEDIAN LONGITUDE: -8.066127 * SOUTH-BOUND LATITUDE: -70.650000 * WEST-BOUND LONGITUDE: -8.250000 * NORTH-BOUND LATITUDE: -70.575220 * EAST-BOUND LONGITUDE: -7.482580 * DATE/TIME START: 2012-11-22T04:00:00 * DATE/TIME END: 2014-02-09T21:06:00 |
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,-70.575220,-70.650000) |
geographic |
Antarctic Atka Ekström Ice Shelf Weddell Weddell Sea |
geographic_facet |
Antarctic Atka Ekström Ice Shelf Weddell Weddell Sea |
genre |
Antarc* Antarctic Ice Shelf Ice Shelves Sea ice Weddell Sea |
genre_facet |
Antarc* Antarctic Ice Shelf Ice Shelves Sea ice Weddell Sea |
op_source |
Supplement to: Hoppmann, Mario; Nicolaus, Marcel; Hunkeler, Priska A; Heil, Petra; Behrens, Lisa K; König-Langlo, Gert; Gerdes, Rüdiger (2015): Seasonal evolution of an ice-shelf influenced fast-ice regime, derived from an autonomous thermistor chain. Journal of Geophysical Research: Oceans, 120(3), 1703-1724, https://doi.org/10.1002/2014JC010327 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.833978 https://doi.org/10.1594/PANGAEA.833978 |
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.833978 https://doi.org/10.1002/2014JC010327 |
_version_ |
1766164633009258496 |