Eighteen-year record of circum-Antarctic landfast-sea-ice distribution allows detailed baseline characterisation and reveals trends and variability
Landfast sea ice (fast ice) is an important though poorly understood component of the cryosphere on the Antarctic continental shelf, where it plays a key role in atmosphere–ocean–ice-sheet interaction and coupled ecological and biogeochemical processes. Here, we present a first in-depth baseline ana...
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Copernicus Publications; European Geosciences Union
2021
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Online Access: | https://hdl.handle.net/2440/134517 https://doi.org/10.5194/tc-15-5061-2021 |
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ftunivadelaidedl:oai:digital.library.adelaide.edu.au:2440/134517 2023-12-17T10:21:30+01:00 Eighteen-year record of circum-Antarctic landfast-sea-ice distribution allows detailed baseline characterisation and reveals trends and variability Fraser, A.D. Massom, R.A. Handcock, M.S. Reid, P. Ohshima, K.I. Raphael, M.N. Cartwright, J. Klekociuk, A.R. Wang, Z. Porter-Smith, R. 2021 application/pdf https://hdl.handle.net/2440/134517 https://doi.org/10.5194/tc-15-5061-2021 en eng Copernicus Publications; European Geosciences Union http://purl.org/au-research/grants/arc/SR140300001 The Cryosphere, 2021; 15(11):5061-5077 1994-0424 https://hdl.handle.net/2440/134517 doi:10.5194/tc-15-5061-2021 Klekociuk, A.R. [0000-0003-3335-0034] © Author(s) 2021. This work is distributed under the Creative Commons Attribution 4.0 License. Published by Copernicus Publications on behalf of the European Geosciences Union. http://dx.doi.org/10.5194/tc-15-5061-2021 Journal article 2021 ftunivadelaidedl https://doi.org/10.5194/tc-15-5061-2021 2023-11-20T23:19:01Z Landfast sea ice (fast ice) is an important though poorly understood component of the cryosphere on the Antarctic continental shelf, where it plays a key role in atmosphere–ocean–ice-sheet interaction and coupled ecological and biogeochemical processes. Here, we present a first in-depth baseline analysis of variability and change in circum-Antarctic fast-ice distribution (including its relationship to bathymetry), based on a new high-resolution satellite-derived time series for the period 2000 to 2018. This reveals (a) an overall trend of −882 ± 824 km² yr⁻¹ (−0.19 ± 0.18% yr⁻¹) and (b) eight distinct regions in terms of fast-ice coverage and modes of formation. Of these, four exhibit positive trends over the 18-year period and four negative. Positive trends are seen in East Antarctica and in the Bellingshausen Sea, with this region claiming the largest positive trend of + 1198 ± 359 km² yr⁻¹ (+1.10 ± 0.35% yr⁻¹). The four negative trends predominantly occur in West Antarctica, with the largest negative trend of −1206 ± 277 km² yr⁻¹ (−1.78 ± 0.41% yr⁻¹) occurring in the Victoria and Oates Land region in the western Ross Sea. All trends are significant. This new baseline analysis represents a significant advance in our knowledge of the current state of both the global cryosphere and the complex Antarctic coastal system, which are vulnerable to climate variability and change. It will also inform a wide range of other studies. Alexander D. Fraser, Robert A. Massom, Mark S. Handcock, Phillip Reid, Kay I. Ohshima, Marilyn N. Raphael, Jessica Cartwright, Andrew R. Klekociuk, Zhaohui Wang, and Richard Porter-Smith Article in Journal/Newspaper Antarc* Antarctic Antarctica Bellingshausen Sea East Antarctica Ice Sheet Oates Land Ross Sea Sea ice The Cryosphere West Antarctica The University of Adelaide: Digital Library Antarctic Bellingshausen Sea Cartwright ENVELOPE(175.133,175.133,-84.350,-84.350) East Antarctica Kay ENVELOPE(-60.917,-60.917,-64.117,-64.117) Oates Land ENVELOPE(158.000,158.000,-70.000,-70.000) Ross Sea The Antarctic West Antarctica The Cryosphere 15 11 5061 5077 |
institution |
Open Polar |
collection |
The University of Adelaide: Digital Library |
op_collection_id |
ftunivadelaidedl |
language |
English |
description |
Landfast sea ice (fast ice) is an important though poorly understood component of the cryosphere on the Antarctic continental shelf, where it plays a key role in atmosphere–ocean–ice-sheet interaction and coupled ecological and biogeochemical processes. Here, we present a first in-depth baseline analysis of variability and change in circum-Antarctic fast-ice distribution (including its relationship to bathymetry), based on a new high-resolution satellite-derived time series for the period 2000 to 2018. This reveals (a) an overall trend of −882 ± 824 km² yr⁻¹ (−0.19 ± 0.18% yr⁻¹) and (b) eight distinct regions in terms of fast-ice coverage and modes of formation. Of these, four exhibit positive trends over the 18-year period and four negative. Positive trends are seen in East Antarctica and in the Bellingshausen Sea, with this region claiming the largest positive trend of + 1198 ± 359 km² yr⁻¹ (+1.10 ± 0.35% yr⁻¹). The four negative trends predominantly occur in West Antarctica, with the largest negative trend of −1206 ± 277 km² yr⁻¹ (−1.78 ± 0.41% yr⁻¹) occurring in the Victoria and Oates Land region in the western Ross Sea. All trends are significant. This new baseline analysis represents a significant advance in our knowledge of the current state of both the global cryosphere and the complex Antarctic coastal system, which are vulnerable to climate variability and change. It will also inform a wide range of other studies. Alexander D. Fraser, Robert A. Massom, Mark S. Handcock, Phillip Reid, Kay I. Ohshima, Marilyn N. Raphael, Jessica Cartwright, Andrew R. Klekociuk, Zhaohui Wang, and Richard Porter-Smith |
format |
Article in Journal/Newspaper |
author |
Fraser, A.D. Massom, R.A. Handcock, M.S. Reid, P. Ohshima, K.I. Raphael, M.N. Cartwright, J. Klekociuk, A.R. Wang, Z. Porter-Smith, R. |
spellingShingle |
Fraser, A.D. Massom, R.A. Handcock, M.S. Reid, P. Ohshima, K.I. Raphael, M.N. Cartwright, J. Klekociuk, A.R. Wang, Z. Porter-Smith, R. Eighteen-year record of circum-Antarctic landfast-sea-ice distribution allows detailed baseline characterisation and reveals trends and variability |
author_facet |
Fraser, A.D. Massom, R.A. Handcock, M.S. Reid, P. Ohshima, K.I. Raphael, M.N. Cartwright, J. Klekociuk, A.R. Wang, Z. Porter-Smith, R. |
author_sort |
Fraser, A.D. |
title |
Eighteen-year record of circum-Antarctic landfast-sea-ice distribution allows detailed baseline characterisation and reveals trends and variability |
title_short |
Eighteen-year record of circum-Antarctic landfast-sea-ice distribution allows detailed baseline characterisation and reveals trends and variability |
title_full |
Eighteen-year record of circum-Antarctic landfast-sea-ice distribution allows detailed baseline characterisation and reveals trends and variability |
title_fullStr |
Eighteen-year record of circum-Antarctic landfast-sea-ice distribution allows detailed baseline characterisation and reveals trends and variability |
title_full_unstemmed |
Eighteen-year record of circum-Antarctic landfast-sea-ice distribution allows detailed baseline characterisation and reveals trends and variability |
title_sort |
eighteen-year record of circum-antarctic landfast-sea-ice distribution allows detailed baseline characterisation and reveals trends and variability |
publisher |
Copernicus Publications; European Geosciences Union |
publishDate |
2021 |
url |
https://hdl.handle.net/2440/134517 https://doi.org/10.5194/tc-15-5061-2021 |
long_lat |
ENVELOPE(175.133,175.133,-84.350,-84.350) ENVELOPE(-60.917,-60.917,-64.117,-64.117) ENVELOPE(158.000,158.000,-70.000,-70.000) |
geographic |
Antarctic Bellingshausen Sea Cartwright East Antarctica Kay Oates Land Ross Sea The Antarctic West Antarctica |
geographic_facet |
Antarctic Bellingshausen Sea Cartwright East Antarctica Kay Oates Land Ross Sea The Antarctic West Antarctica |
genre |
Antarc* Antarctic Antarctica Bellingshausen Sea East Antarctica Ice Sheet Oates Land Ross Sea Sea ice The Cryosphere West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Bellingshausen Sea East Antarctica Ice Sheet Oates Land Ross Sea Sea ice The Cryosphere West Antarctica |
op_source |
http://dx.doi.org/10.5194/tc-15-5061-2021 |
op_relation |
http://purl.org/au-research/grants/arc/SR140300001 The Cryosphere, 2021; 15(11):5061-5077 1994-0424 https://hdl.handle.net/2440/134517 doi:10.5194/tc-15-5061-2021 Klekociuk, A.R. [0000-0003-3335-0034] |
op_rights |
© Author(s) 2021. This work is distributed under the Creative Commons Attribution 4.0 License. Published by Copernicus Publications on behalf of the European Geosciences Union. |
op_doi |
https://doi.org/10.5194/tc-15-5061-2021 |
container_title |
The Cryosphere |
container_volume |
15 |
container_issue |
11 |
container_start_page |
5061 |
op_container_end_page |
5077 |
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1785535314792546304 |