Video_2_Ocean turbulent boundary-layer influence on ice crystal behaviour beneath fast ice in an Antarctic ice shelf water plume: The “dirty ice”.mp4
The oceanic connection between ice shelf cavities and sea ice influences sea ice development and persistence. One unique feature in regions near ice shelves is the potential for sea ice growth due to crystal accretion on its underside. Here we present observations of ocean boundary-layer processes a...
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ftfrontimediafig:oai:figshare.com:article/22146224 2023-05-15T13:54:48+02:00 Video_2_Ocean turbulent boundary-layer influence on ice crystal behaviour beneath fast ice in an Antarctic ice shelf water plume: The “dirty ice”.mp4 Craig Stevens Natalie Robinson Gabby O’Connor Brett Grant 2023-02-23T05:21:08Z https://doi.org/10.3389/fmars.2023.1103740.s002 https://figshare.com/articles/media/Video_2_Ocean_turbulent_boundary-layer_influence_on_ice_crystal_behaviour_beneath_fast_ice_in_an_Antarctic_ice_shelf_water_plume_The_dirty_ice_mp4/22146224 unknown doi:10.3389/fmars.2023.1103740.s002 https://figshare.com/articles/media/Video_2_Ocean_turbulent_boundary-layer_influence_on_ice_crystal_behaviour_beneath_fast_ice_in_an_Antarctic_ice_shelf_water_plume_The_dirty_ice_mp4/22146224 CC BY 4.0 CC-BY Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering ice shelf water (ISW) frazil ice turbulent boundary layer Antarctica fast ice formation shear microstructure supercool seawater Dataset Media 2023 ftfrontimediafig https://doi.org/10.3389/fmars.2023.1103740.s002 2023-03-02T00:12:41Z The oceanic connection between ice shelf cavities and sea ice influences sea ice development and persistence. One unique feature in regions near ice shelves is the potential for sea ice growth due to crystal accretion on its underside. Here we present observations of ocean boundary-layer processes and ice crystal behaviour in an Ice Shelf Water outflow region from the Ross/McMurdo Ice Shelves. From a fast ice field camp during the Spring of 2015, we captured the kinematics of free-floating relatively large (in some cases 10s of mm in scale) ice crystals that were advecting and then settling upwards in a depositional layer on the sea ice underside (SIPL, sub-ice platelet layer). Simultaneously, we measured the background oceanic temperature, salinity, currents and turbulence structure. At the camp location the total water depth was 536 m, with the uppermost 50 m of the water column being in-situ super-cooled. Tidal flow speeds had an amplitude of around 0.1 m s -1 with dissipation rates in the under-ice boundary layer measured to be up to ε=10 -6 W kg -1 . Acoustic sampling (200 kHz) identified backscatter from large, individually identifiable suspended crystals associated with crystal sizes larger than normally described as frazil. Measurement of crystals in the SIPL found dimensions of the range 5-200 mm with an average of 93-101 mm depending on the year. The existence and settlement of crystals has implications for understanding SIPL evolution, the structure of sea ice, as well as the fate of Ice Shelf Water. Dataset Antarc* Antarctic Antarctica Ice Shelf Ice Shelves Sea ice Frontiers: Figshare Antarctic |
institution |
Open Polar |
collection |
Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering ice shelf water (ISW) frazil ice turbulent boundary layer Antarctica fast ice formation shear microstructure supercool seawater |
spellingShingle |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering ice shelf water (ISW) frazil ice turbulent boundary layer Antarctica fast ice formation shear microstructure supercool seawater Craig Stevens Natalie Robinson Gabby O’Connor Brett Grant Video_2_Ocean turbulent boundary-layer influence on ice crystal behaviour beneath fast ice in an Antarctic ice shelf water plume: The “dirty ice”.mp4 |
topic_facet |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering ice shelf water (ISW) frazil ice turbulent boundary layer Antarctica fast ice formation shear microstructure supercool seawater |
description |
The oceanic connection between ice shelf cavities and sea ice influences sea ice development and persistence. One unique feature in regions near ice shelves is the potential for sea ice growth due to crystal accretion on its underside. Here we present observations of ocean boundary-layer processes and ice crystal behaviour in an Ice Shelf Water outflow region from the Ross/McMurdo Ice Shelves. From a fast ice field camp during the Spring of 2015, we captured the kinematics of free-floating relatively large (in some cases 10s of mm in scale) ice crystals that were advecting and then settling upwards in a depositional layer on the sea ice underside (SIPL, sub-ice platelet layer). Simultaneously, we measured the background oceanic temperature, salinity, currents and turbulence structure. At the camp location the total water depth was 536 m, with the uppermost 50 m of the water column being in-situ super-cooled. Tidal flow speeds had an amplitude of around 0.1 m s -1 with dissipation rates in the under-ice boundary layer measured to be up to ε=10 -6 W kg -1 . Acoustic sampling (200 kHz) identified backscatter from large, individually identifiable suspended crystals associated with crystal sizes larger than normally described as frazil. Measurement of crystals in the SIPL found dimensions of the range 5-200 mm with an average of 93-101 mm depending on the year. The existence and settlement of crystals has implications for understanding SIPL evolution, the structure of sea ice, as well as the fate of Ice Shelf Water. |
format |
Dataset |
author |
Craig Stevens Natalie Robinson Gabby O’Connor Brett Grant |
author_facet |
Craig Stevens Natalie Robinson Gabby O’Connor Brett Grant |
author_sort |
Craig Stevens |
title |
Video_2_Ocean turbulent boundary-layer influence on ice crystal behaviour beneath fast ice in an Antarctic ice shelf water plume: The “dirty ice”.mp4 |
title_short |
Video_2_Ocean turbulent boundary-layer influence on ice crystal behaviour beneath fast ice in an Antarctic ice shelf water plume: The “dirty ice”.mp4 |
title_full |
Video_2_Ocean turbulent boundary-layer influence on ice crystal behaviour beneath fast ice in an Antarctic ice shelf water plume: The “dirty ice”.mp4 |
title_fullStr |
Video_2_Ocean turbulent boundary-layer influence on ice crystal behaviour beneath fast ice in an Antarctic ice shelf water plume: The “dirty ice”.mp4 |
title_full_unstemmed |
Video_2_Ocean turbulent boundary-layer influence on ice crystal behaviour beneath fast ice in an Antarctic ice shelf water plume: The “dirty ice”.mp4 |
title_sort |
video_2_ocean turbulent boundary-layer influence on ice crystal behaviour beneath fast ice in an antarctic ice shelf water plume: the “dirty ice”.mp4 |
publishDate |
2023 |
url |
https://doi.org/10.3389/fmars.2023.1103740.s002 https://figshare.com/articles/media/Video_2_Ocean_turbulent_boundary-layer_influence_on_ice_crystal_behaviour_beneath_fast_ice_in_an_Antarctic_ice_shelf_water_plume_The_dirty_ice_mp4/22146224 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica Ice Shelf Ice Shelves Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Ice Shelf Ice Shelves Sea ice |
op_relation |
doi:10.3389/fmars.2023.1103740.s002 https://figshare.com/articles/media/Video_2_Ocean_turbulent_boundary-layer_influence_on_ice_crystal_behaviour_beneath_fast_ice_in_an_Antarctic_ice_shelf_water_plume_The_dirty_ice_mp4/22146224 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fmars.2023.1103740.s002 |
_version_ |
1766260928208175104 |