Potential regime shift in decreased sea ice production after the Mertz Glacier calving
Variability in dense shelf water formation can potentially impact Antarctic Bottom Water (AABW) production, a vital component of the global climate system. In East Antarctica, the George V Land polynya system (142-150°E) is structured by the local 'icescape', promoting sea ice formation th...
Published in: | Nature Communications |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Nature Publishing Group
|
Subjects: | |
Online Access: | http://hdl.handle.net/2115/49429 https://doi.org/10.1038/ncomms1820 |
id |
fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/49429 |
---|---|
record_format |
openpolar |
spelling |
fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/49429 2023-05-15T13:42:37+02:00 Potential regime shift in decreased sea ice production after the Mertz Glacier calving Tamura, T. Williams, G. D. Fraser, A. D. Ohshima, K. I. http://hdl.handle.net/2115/49429 https://doi.org/10.1038/ncomms1820 eng eng Nature Publishing Group http://hdl.handle.net/2115/49429 Nature Communications, 3: 826 http://dx.doi.org/10.1038/ncomms1820 http://creativecommons.org/licenses/by-nc-sa/3.0/ CC-BY-NC-SA 452 article fthokunivhus https://doi.org/10.1038/ncomms1820 2022-11-18T01:02:25Z Variability in dense shelf water formation can potentially impact Antarctic Bottom Water (AABW) production, a vital component of the global climate system. In East Antarctica, the George V Land polynya system (142-150°E) is structured by the local 'icescape', promoting sea ice formation that is driven by the offshore wind regime. Here we present the first observations of this region after the repositioning of a large iceberg (B9B) precipitated the calving of the Mertz Glacier Tongue in 2010. Using satellite data, we find that the total sea ice production for the region in 2010 and 2011 was 144 and 134 km3, respectively, representing a 14-20% decrease from a value of 168 km3 averaged from 2000-2009. This abrupt change to the regional icescape could result in decreased polynya activity, sea ice production, and ultimately the dense shelf water export and AABW production from this region for the coming decades. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica George V Land Iceberg* Mertz Glacier Sea ice Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Antarctic East Antarctica George V Land ENVELOPE(148.000,148.000,-68.500,-68.500) Mertz Glacier ENVELOPE(144.500,144.500,-67.667,-67.667) Mertz Glacier Tongue ENVELOPE(145.500,145.500,-67.167,-67.167) Nature Communications 3 1 |
institution |
Open Polar |
collection |
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
op_collection_id |
fthokunivhus |
language |
English |
topic |
452 |
spellingShingle |
452 Tamura, T. Williams, G. D. Fraser, A. D. Ohshima, K. I. Potential regime shift in decreased sea ice production after the Mertz Glacier calving |
topic_facet |
452 |
description |
Variability in dense shelf water formation can potentially impact Antarctic Bottom Water (AABW) production, a vital component of the global climate system. In East Antarctica, the George V Land polynya system (142-150°E) is structured by the local 'icescape', promoting sea ice formation that is driven by the offshore wind regime. Here we present the first observations of this region after the repositioning of a large iceberg (B9B) precipitated the calving of the Mertz Glacier Tongue in 2010. Using satellite data, we find that the total sea ice production for the region in 2010 and 2011 was 144 and 134 km3, respectively, representing a 14-20% decrease from a value of 168 km3 averaged from 2000-2009. This abrupt change to the regional icescape could result in decreased polynya activity, sea ice production, and ultimately the dense shelf water export and AABW production from this region for the coming decades. |
format |
Article in Journal/Newspaper |
author |
Tamura, T. Williams, G. D. Fraser, A. D. Ohshima, K. I. |
author_facet |
Tamura, T. Williams, G. D. Fraser, A. D. Ohshima, K. I. |
author_sort |
Tamura, T. |
title |
Potential regime shift in decreased sea ice production after the Mertz Glacier calving |
title_short |
Potential regime shift in decreased sea ice production after the Mertz Glacier calving |
title_full |
Potential regime shift in decreased sea ice production after the Mertz Glacier calving |
title_fullStr |
Potential regime shift in decreased sea ice production after the Mertz Glacier calving |
title_full_unstemmed |
Potential regime shift in decreased sea ice production after the Mertz Glacier calving |
title_sort |
potential regime shift in decreased sea ice production after the mertz glacier calving |
publisher |
Nature Publishing Group |
url |
http://hdl.handle.net/2115/49429 https://doi.org/10.1038/ncomms1820 |
long_lat |
ENVELOPE(148.000,148.000,-68.500,-68.500) ENVELOPE(144.500,144.500,-67.667,-67.667) ENVELOPE(145.500,145.500,-67.167,-67.167) |
geographic |
Antarctic East Antarctica George V Land Mertz Glacier Mertz Glacier Tongue |
geographic_facet |
Antarctic East Antarctica George V Land Mertz Glacier Mertz Glacier Tongue |
genre |
Antarc* Antarctic Antarctica East Antarctica George V Land Iceberg* Mertz Glacier Sea ice |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica George V Land Iceberg* Mertz Glacier Sea ice |
op_relation |
http://hdl.handle.net/2115/49429 Nature Communications, 3: 826 http://dx.doi.org/10.1038/ncomms1820 |
op_rights |
http://creativecommons.org/licenses/by-nc-sa/3.0/ |
op_rightsnorm |
CC-BY-NC-SA |
op_doi |
https://doi.org/10.1038/ncomms1820 |
container_title |
Nature Communications |
container_volume |
3 |
container_issue |
1 |
_version_ |
1766170152856977408 |