Field measurements of the atmosphere, ocean, sea ice and sub-ice platelet layer at Atka Bay in 2013, 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
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...
Main Authors: | , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
PANGAEA - Data Publisher for Earth & Environmental Science
2015
|
Subjects: | |
Online Access: | https://dx.doi.org/10.1594/pangaea.833978 https://doi.pangaea.de/10.1594/PANGAEA.833978 |
id |
ftdatacite:10.1594/pangaea.833978 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.1594/pangaea.833978 2023-05-15T13:59:32+02:00 Field measurements of the atmosphere, ocean, sea ice and sub-ice platelet layer at Atka Bay in 2013, 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 Hoppmann, Mario Nicolaus, Marcel Hunkeler, Priska A König-Langlo, Gert 2015 application/zip https://dx.doi.org/10.1594/pangaea.833978 https://doi.pangaea.de/10.1594/PANGAEA.833978 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1002/2014jc010327 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Sea Ice Physics @ AWI AWI_SeaIce article Supplementary Collection of Datasets Collection 2015 ftdatacite https://doi.org/10.1594/pangaea.833978 https://doi.org/10.1002/2014jc010327 2022-03-10T11:45:21Z 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. Article in Journal/Newspaper Antarc* Antarctic Ice Shelf Ice Shelves Sea ice Weddell Sea DataCite Metadata Store (German National Library of Science and Technology) Antarctic Weddell Sea Weddell Atka ENVELOPE(151.789,151.789,60.835,60.835) Ekström Ice Shelf ENVELOPE(-8.000,-8.000,-71.000,-71.000) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Sea Ice Physics @ AWI AWI_SeaIce |
spellingShingle |
Sea Ice Physics @ AWI AWI_SeaIce 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, 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 |
topic_facet |
Sea Ice Physics @ AWI AWI_SeaIce |
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 |
Article in Journal/Newspaper |
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, 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 |
title_short |
Field measurements of the atmosphere, ocean, sea ice and sub-ice platelet layer at Atka Bay in 2013, 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 |
title_full |
Field measurements of the atmosphere, ocean, sea ice and sub-ice platelet layer at Atka Bay in 2013, 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 |
title_fullStr |
Field measurements of the atmosphere, ocean, sea ice and sub-ice platelet layer at Atka Bay in 2013, 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 |
title_full_unstemmed |
Field measurements of the atmosphere, ocean, sea ice and sub-ice platelet layer at Atka Bay in 2013, 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 |
title_sort |
field measurements of the atmosphere, ocean, sea ice and sub-ice platelet layer at atka bay in 2013, 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 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2015 |
url |
https://dx.doi.org/10.1594/pangaea.833978 https://doi.pangaea.de/10.1594/PANGAEA.833978 |
long_lat |
ENVELOPE(151.789,151.789,60.835,60.835) ENVELOPE(-8.000,-8.000,-71.000,-71.000) |
geographic |
Antarctic Weddell Sea Weddell Atka Ekström Ice Shelf |
geographic_facet |
Antarctic Weddell Sea Weddell Atka Ekström Ice Shelf |
genre |
Antarc* Antarctic Ice Shelf Ice Shelves Sea ice Weddell Sea |
genre_facet |
Antarc* Antarctic Ice Shelf Ice Shelves Sea ice Weddell Sea |
op_relation |
https://dx.doi.org/10.1002/2014jc010327 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.833978 https://doi.org/10.1002/2014jc010327 |
_version_ |
1766268127856820224 |