Helicopter‐Based Ocean Observations Capture Broad Ocean Heat Intrusions Toward the Totten Ice Shelf
Abstract The recent discovery of warm ocean water near the Totten Ice Shelf (TIS) has increased attention to the Sabrina Coast in East Antarctica. We report the result of 6‐day helicopter‐based observations conducted during the 61st Japanese Antarctic Research Expedition (JARE61), revealing warm oce...
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ftdoajarticles:oai:doaj.org/article:364467d0bdd4471e9524681992484d43 2024-09-15T17:41:50+00:00 Helicopter‐Based Ocean Observations Capture Broad Ocean Heat Intrusions Toward the Totten Ice Shelf Yoshihiro Nakayama Pat Wongpan Jamin S. Greenbaum Kaihe Yamazaki Tomohide Noguchi Daisuke Simizu Haruhiko Kashiwase Donald D. Blankenship Takeshi Tamura Shigeru Aoki 2023-09-01T00:00:00Z https://doi.org/10.1029/2022GL097864 https://doaj.org/article/364467d0bdd4471e9524681992484d43 EN eng Wiley https://doi.org/10.1029/2022GL097864 https://doaj.org/toc/0094-8276 https://doaj.org/toc/1944-8007 1944-8007 0094-8276 doi:10.1029/2022GL097864 https://doaj.org/article/364467d0bdd4471e9524681992484d43 Geophysical Research Letters, Vol 50, Iss 17, Pp n/a-n/a (2023) southern ocean ice shelf ocean heat intrusions airborne measurement AXCTD AXBT Geophysics. Cosmic physics QC801-809 article 2023 ftdoajarticles https://doi.org/10.1029/2022GL097864 2024-08-05T17:49:23Z Abstract The recent discovery of warm ocean water near the Totten Ice Shelf (TIS) has increased attention to the Sabrina Coast in East Antarctica. We report the result of 6‐day helicopter‐based observations conducted during the 61st Japanese Antarctic Research Expedition (JARE61), revealing warm ocean water (0.5–1°C) occupying a large previously unsampled area of the Sabrina Coast (116.5°E−120°E) below 550–600 m. Along the TIS front, we observe modified Circumpolar Deep Water (mCDW) well above freezing (∼−0.7°C), consistent with previous work. We identify glacial meltwater outflow from the TIS cavity west of 116°E. No signs of mCDW intrusions toward the Moscow University Ice Shelf cavity are observed; however, those observations were limited to only two shallow (∼330 m) profiles. We also highlight the advantages of helicopter‐based observations for accessibility, speed, maneuverability, and cost‐efficiency. The combination of ship‐ and helicopter‐based observations using the JARE61 approach will increase the potential of future polar oceanographic observations. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ice Shelf Moscow University Ice Shelf Southern Ocean Totten Ice Shelf Directory of Open Access Journals: DOAJ Articles Geophysical Research Letters 50 17 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
southern ocean ice shelf ocean heat intrusions airborne measurement AXCTD AXBT Geophysics. Cosmic physics QC801-809 |
spellingShingle |
southern ocean ice shelf ocean heat intrusions airborne measurement AXCTD AXBT Geophysics. Cosmic physics QC801-809 Yoshihiro Nakayama Pat Wongpan Jamin S. Greenbaum Kaihe Yamazaki Tomohide Noguchi Daisuke Simizu Haruhiko Kashiwase Donald D. Blankenship Takeshi Tamura Shigeru Aoki Helicopter‐Based Ocean Observations Capture Broad Ocean Heat Intrusions Toward the Totten Ice Shelf |
topic_facet |
southern ocean ice shelf ocean heat intrusions airborne measurement AXCTD AXBT Geophysics. Cosmic physics QC801-809 |
description |
Abstract The recent discovery of warm ocean water near the Totten Ice Shelf (TIS) has increased attention to the Sabrina Coast in East Antarctica. We report the result of 6‐day helicopter‐based observations conducted during the 61st Japanese Antarctic Research Expedition (JARE61), revealing warm ocean water (0.5–1°C) occupying a large previously unsampled area of the Sabrina Coast (116.5°E−120°E) below 550–600 m. Along the TIS front, we observe modified Circumpolar Deep Water (mCDW) well above freezing (∼−0.7°C), consistent with previous work. We identify glacial meltwater outflow from the TIS cavity west of 116°E. No signs of mCDW intrusions toward the Moscow University Ice Shelf cavity are observed; however, those observations were limited to only two shallow (∼330 m) profiles. We also highlight the advantages of helicopter‐based observations for accessibility, speed, maneuverability, and cost‐efficiency. The combination of ship‐ and helicopter‐based observations using the JARE61 approach will increase the potential of future polar oceanographic observations. |
format |
Article in Journal/Newspaper |
author |
Yoshihiro Nakayama Pat Wongpan Jamin S. Greenbaum Kaihe Yamazaki Tomohide Noguchi Daisuke Simizu Haruhiko Kashiwase Donald D. Blankenship Takeshi Tamura Shigeru Aoki |
author_facet |
Yoshihiro Nakayama Pat Wongpan Jamin S. Greenbaum Kaihe Yamazaki Tomohide Noguchi Daisuke Simizu Haruhiko Kashiwase Donald D. Blankenship Takeshi Tamura Shigeru Aoki |
author_sort |
Yoshihiro Nakayama |
title |
Helicopter‐Based Ocean Observations Capture Broad Ocean Heat Intrusions Toward the Totten Ice Shelf |
title_short |
Helicopter‐Based Ocean Observations Capture Broad Ocean Heat Intrusions Toward the Totten Ice Shelf |
title_full |
Helicopter‐Based Ocean Observations Capture Broad Ocean Heat Intrusions Toward the Totten Ice Shelf |
title_fullStr |
Helicopter‐Based Ocean Observations Capture Broad Ocean Heat Intrusions Toward the Totten Ice Shelf |
title_full_unstemmed |
Helicopter‐Based Ocean Observations Capture Broad Ocean Heat Intrusions Toward the Totten Ice Shelf |
title_sort |
helicopter‐based ocean observations capture broad ocean heat intrusions toward the totten ice shelf |
publisher |
Wiley |
publishDate |
2023 |
url |
https://doi.org/10.1029/2022GL097864 https://doaj.org/article/364467d0bdd4471e9524681992484d43 |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Shelf Moscow University Ice Shelf Southern Ocean Totten Ice Shelf |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Shelf Moscow University Ice Shelf Southern Ocean Totten Ice Shelf |
op_source |
Geophysical Research Letters, Vol 50, Iss 17, Pp n/a-n/a (2023) |
op_relation |
https://doi.org/10.1029/2022GL097864 https://doaj.org/toc/0094-8276 https://doaj.org/toc/1944-8007 1944-8007 0094-8276 doi:10.1029/2022GL097864 https://doaj.org/article/364467d0bdd4471e9524681992484d43 |
op_doi |
https://doi.org/10.1029/2022GL097864 |
container_title |
Geophysical Research Letters |
container_volume |
50 |
container_issue |
17 |
_version_ |
1810488110552711168 |