Wintertime polynya structure and variability from thermal remote sensing and seal-borne observations at Pine Island Glacier, West Antarctica
Funding: This work was enabled by the NSF-NERC International Thwaites Glacier Collaboration: Thwaites-Amundsen Regional Survey and Network (ITGC: TARSAN; NERC Grant: NE/S006419/1, NE/S006591/1, NSF Grant: 1738992) and the NERC Ice Sheet Stability Programme (iSTAR; NERC Grant: NE/J005703/1). Antarcti...
Published in: | IEEE Transactions on Geoscience and Remote Sensing |
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Main Authors: | , , , , , , , |
Other Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2023
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Online Access: | http://hdl.handle.net/10023/27482 https://doi.org/10.1109/TGRS.2023.3271453 |
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ftstandrewserep:oai:research-repository.st-andrews.ac.uk:10023/27482 |
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openpolar |
institution |
Open Polar |
collection |
University of St Andrews: Digital Research Repository |
op_collection_id |
ftstandrewserep |
language |
English |
topic |
Polynya Oceanography Antarctica GC Oceanography QH301 Biology DAS SDG 14 - Life Below Water MCP GC QH301 |
spellingShingle |
Polynya Oceanography Antarctica GC Oceanography QH301 Biology DAS SDG 14 - Life Below Water MCP GC QH301 Savidge, Elena Snow, Tasha Siegfried, Matthew R. Zheng, Yixi Villas Bôas, Ana B. Bortolotto, Guilherme A. Boehme, Lars Alley, Karen E. Wintertime polynya structure and variability from thermal remote sensing and seal-borne observations at Pine Island Glacier, West Antarctica |
topic_facet |
Polynya Oceanography Antarctica GC Oceanography QH301 Biology DAS SDG 14 - Life Below Water MCP GC QH301 |
description |
Funding: This work was enabled by the NSF-NERC International Thwaites Glacier Collaboration: Thwaites-Amundsen Regional Survey and Network (ITGC: TARSAN; NERC Grant: NE/S006419/1, NE/S006591/1, NSF Grant: 1738992) and the NERC Ice Sheet Stability Programme (iSTAR; NERC Grant: NE/J005703/1). Antarctica’s ice shelves play a critical role in modulating ice loss to the ocean by buttressing grounded ice upstream. With the potential to impact ice-shelf stability, persistent polynyas (open-water areas surrounded by sea ice, persisting for multiple years at the same location) at the edge of many ice-shelf fronts, are maintained by winds and/or ocean heat, and are locations of strong ice-ocean-atmosphere interactions. However, in situ observations of polynyas are sparse due to the logistical constraints of collecting Antarctic field measurements. Here, we used wintertime (May–August) temperature and salinity observations derived from seal-borne tags deployed in 2014, 2019, and 2020, in conjunction with thermal imagery from the MODerate resolution Imaging Spectroradiometer (MODIS) and the Landsat 8 Thermal Infrared Sensor (TIRS) to investigate the spatial, temporal, and thermal structural variability of polynyas near Pine Island Glacier (PIG). Across the three winters considered, there were 148 anomalously warm (>3σ from background) seal dives near the PIG ice front, including 24 dives that coincided with MODIS images with minimal cloud cover that also showed a warm surface temperature anomaly. These warm surface temperatures correlated with ocean temperatures down to 150 m depth or deeper, depending on the year, suggesting that MODISderived surface thermal anomalies can be used for monitoring polynya presence and structure during polar night. The finer spatial resolution (100 m) of TIRS wintertime thermal imagery captures more detailed thermal structural variability within these polynyas, which may provide year-round insight into sub-ice-shelf processes if this dataset is collected operationally. Publisher PDF ... |
author2 |
NERC University of St Andrews. School of Biology University of St Andrews. Sea Mammal Research Unit University of St Andrews. Scottish Oceans Institute University of St Andrews. Marine Alliance for Science & Technology Scotland |
format |
Article in Journal/Newspaper |
author |
Savidge, Elena Snow, Tasha Siegfried, Matthew R. Zheng, Yixi Villas Bôas, Ana B. Bortolotto, Guilherme A. Boehme, Lars Alley, Karen E. |
author_facet |
Savidge, Elena Snow, Tasha Siegfried, Matthew R. Zheng, Yixi Villas Bôas, Ana B. Bortolotto, Guilherme A. Boehme, Lars Alley, Karen E. |
author_sort |
Savidge, Elena |
title |
Wintertime polynya structure and variability from thermal remote sensing and seal-borne observations at Pine Island Glacier, West Antarctica |
title_short |
Wintertime polynya structure and variability from thermal remote sensing and seal-borne observations at Pine Island Glacier, West Antarctica |
title_full |
Wintertime polynya structure and variability from thermal remote sensing and seal-borne observations at Pine Island Glacier, West Antarctica |
title_fullStr |
Wintertime polynya structure and variability from thermal remote sensing and seal-borne observations at Pine Island Glacier, West Antarctica |
title_full_unstemmed |
Wintertime polynya structure and variability from thermal remote sensing and seal-borne observations at Pine Island Glacier, West Antarctica |
title_sort |
wintertime polynya structure and variability from thermal remote sensing and seal-borne observations at pine island glacier, west antarctica |
publishDate |
2023 |
url |
http://hdl.handle.net/10023/27482 https://doi.org/10.1109/TGRS.2023.3271453 |
long_lat |
ENVELOPE(-101.000,-101.000,-75.000,-75.000) ENVELOPE(-106.750,-106.750,-75.500,-75.500) |
geographic |
Antarctic Pine Island Glacier Thwaites Glacier West Antarctica |
geographic_facet |
Antarctic Pine Island Glacier Thwaites Glacier West Antarctica |
genre |
Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Ice Shelves Pine Island Pine Island Glacier polar night Sea ice Thwaites Glacier West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Ice Shelves Pine Island Pine Island Glacier polar night Sea ice Thwaites Glacier West Antarctica |
op_relation |
IEEE Transactions on Geoscience and Remote Sensing Savidge , E , Snow , T , Siegfried , M R , Zheng , Y , Villas Bôas , A B , Bortolotto , G A , Boehme , L & Alley , K E 2023 , ' Wintertime polynya structure and variability from thermal remote sensing and seal-borne observations at Pine Island Glacier, West Antarctica ' , IEEE Transactions on Geoscience and Remote Sensing , vol. Early Access . https://doi.org/10.1109/TGRS.2023.3271453 0196-2892 PURE: 280643359 PURE UUID: 16372782-3535-4dbe-9cab-49b836cb63f4 ORCID: /0000-0002-5343-6575/work/134491677 http://hdl.handle.net/10023/27482 https://doi.org/10.1109/TGRS.2023.3271453 NE/S006591/1 |
op_rights |
Copyright © 2023 The Authors. This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0. |
op_doi |
https://doi.org/10.1109/TGRS.2023.3271453 |
container_title |
IEEE Transactions on Geoscience and Remote Sensing |
container_volume |
61 |
container_start_page |
1 |
op_container_end_page |
13 |
_version_ |
1770274842278363136 |
spelling |
ftstandrewserep:oai:research-repository.st-andrews.ac.uk:10023/27482 2023-07-02T03:30:38+02:00 Wintertime polynya structure and variability from thermal remote sensing and seal-borne observations at Pine Island Glacier, West Antarctica Savidge, Elena Snow, Tasha Siegfried, Matthew R. Zheng, Yixi Villas Bôas, Ana B. Bortolotto, Guilherme A. Boehme, Lars Alley, Karen E. NERC University of St Andrews. School of Biology University of St Andrews. Sea Mammal Research Unit University of St Andrews. Scottish Oceans Institute University of St Andrews. Marine Alliance for Science & Technology Scotland 2023-05-02T11:30:07Z 14 application/pdf http://hdl.handle.net/10023/27482 https://doi.org/10.1109/TGRS.2023.3271453 eng eng IEEE Transactions on Geoscience and Remote Sensing Savidge , E , Snow , T , Siegfried , M R , Zheng , Y , Villas Bôas , A B , Bortolotto , G A , Boehme , L & Alley , K E 2023 , ' Wintertime polynya structure and variability from thermal remote sensing and seal-borne observations at Pine Island Glacier, West Antarctica ' , IEEE Transactions on Geoscience and Remote Sensing , vol. Early Access . https://doi.org/10.1109/TGRS.2023.3271453 0196-2892 PURE: 280643359 PURE UUID: 16372782-3535-4dbe-9cab-49b836cb63f4 ORCID: /0000-0002-5343-6575/work/134491677 http://hdl.handle.net/10023/27482 https://doi.org/10.1109/TGRS.2023.3271453 NE/S006591/1 Copyright © 2023 The Authors. This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0. Polynya Oceanography Antarctica GC Oceanography QH301 Biology DAS SDG 14 - Life Below Water MCP GC QH301 Journal article 2023 ftstandrewserep https://doi.org/10.1109/TGRS.2023.3271453 2023-06-13T18:28:45Z Funding: This work was enabled by the NSF-NERC International Thwaites Glacier Collaboration: Thwaites-Amundsen Regional Survey and Network (ITGC: TARSAN; NERC Grant: NE/S006419/1, NE/S006591/1, NSF Grant: 1738992) and the NERC Ice Sheet Stability Programme (iSTAR; NERC Grant: NE/J005703/1). Antarctica’s ice shelves play a critical role in modulating ice loss to the ocean by buttressing grounded ice upstream. With the potential to impact ice-shelf stability, persistent polynyas (open-water areas surrounded by sea ice, persisting for multiple years at the same location) at the edge of many ice-shelf fronts, are maintained by winds and/or ocean heat, and are locations of strong ice-ocean-atmosphere interactions. However, in situ observations of polynyas are sparse due to the logistical constraints of collecting Antarctic field measurements. Here, we used wintertime (May–August) temperature and salinity observations derived from seal-borne tags deployed in 2014, 2019, and 2020, in conjunction with thermal imagery from the MODerate resolution Imaging Spectroradiometer (MODIS) and the Landsat 8 Thermal Infrared Sensor (TIRS) to investigate the spatial, temporal, and thermal structural variability of polynyas near Pine Island Glacier (PIG). Across the three winters considered, there were 148 anomalously warm (>3σ from background) seal dives near the PIG ice front, including 24 dives that coincided with MODIS images with minimal cloud cover that also showed a warm surface temperature anomaly. These warm surface temperatures correlated with ocean temperatures down to 150 m depth or deeper, depending on the year, suggesting that MODISderived surface thermal anomalies can be used for monitoring polynya presence and structure during polar night. The finer spatial resolution (100 m) of TIRS wintertime thermal imagery captures more detailed thermal structural variability within these polynyas, which may provide year-round insight into sub-ice-shelf processes if this dataset is collected operationally. Publisher PDF ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Ice Shelves Pine Island Pine Island Glacier polar night Sea ice Thwaites Glacier West Antarctica University of St Andrews: Digital Research Repository Antarctic Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) Thwaites Glacier ENVELOPE(-106.750,-106.750,-75.500,-75.500) West Antarctica IEEE Transactions on Geoscience and Remote Sensing 61 1 13 |