DataSheet_1_Spatiotemporal variability in ocean-driven basal melting of cold-water cavity ice shelf in Terra Nova Bay, East Antarctica: roles of tide and cavity geometry.docx
Mass loss from ice shelves occurs through ocean-driven melting regulated by dynamic and thermodynamic processes in sub-ice shelf cavities. However, the understanding of these oceanic processes is quite limited because of the scant observations under ice shelves. Here, a regional coupled sea-ice/ocea...
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2023
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Online Access: | https://doi.org/10.3389/fmars.2023.1249562.s001 https://figshare.com/articles/dataset/DataSheet_1_Spatiotemporal_variability_in_ocean-driven_basal_melting_of_cold-water_cavity_ice_shelf_in_Terra_Nova_Bay_East_Antarctica_roles_of_tide_and_cavity_geometry_docx/24159816 |
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ftfrontimediafig:oai:figshare.com:article/24159816 2024-09-09T19:06:11+00:00 DataSheet_1_Spatiotemporal variability in ocean-driven basal melting of cold-water cavity ice shelf in Terra Nova Bay, East Antarctica: roles of tide and cavity geometry.docx Taekyun Kim Ji-Seok Hong Emilia Kyung Jin Jae-Hong Moon Sang-Keun Song Won Sang Lee 2023-09-19T04:14:57Z https://doi.org/10.3389/fmars.2023.1249562.s001 https://figshare.com/articles/dataset/DataSheet_1_Spatiotemporal_variability_in_ocean-driven_basal_melting_of_cold-water_cavity_ice_shelf_in_Terra_Nova_Bay_East_Antarctica_roles_of_tide_and_cavity_geometry_docx/24159816 unknown doi:10.3389/fmars.2023.1249562.s001 https://figshare.com/articles/dataset/DataSheet_1_Spatiotemporal_variability_in_ocean-driven_basal_melting_of_cold-water_cavity_ice_shelf_in_Terra_Nova_Bay_East_Antarctica_roles_of_tide_and_cavity_geometry_docx/24159816 CC BY 4.0 Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering ocean-ice shelf interaction ocean-driven basal melt cold-water cavity ice shelf tracer experiments numerical simulation Antarctica Dataset 2023 ftfrontimediafig https://doi.org/10.3389/fmars.2023.1249562.s001 2024-08-19T06:19:57Z Mass loss from ice shelves occurs through ocean-driven melting regulated by dynamic and thermodynamic processes in sub-ice shelf cavities. However, the understanding of these oceanic processes is quite limited because of the scant observations under ice shelves. Here, a regional coupled sea-ice/ocean model that includes physical interactions between the ocean and the ice shelf is used as an alternative tool for exploring ocean-driven melting beneath the Nansen Ice Shelf (NIS) which is a cold-water cavity ice shelf located beside Terra Nova Bay (TNB) in East Antarctica. For the first time, this study identifies the spatiotemporal variability signatures for different modes of ocean-driven melting at the base of NIS. In February (austral summer), basal melting substantially increases where the ice shelf draft is relatively small in the vicinity of the ice shelf front, contributing 78% of the total NIS melting rate. As the dominant source of NIS mass loss, this melting is driven by tide-induced turbulent mixing along the sloping ice shelf base and summer warm surface water intruding beneath and reaching the shallow parts of the ice shelf. In contrast, the NIS has relatively high basal melting rates near the grounding line in September (austral winter) primarily because of the intrusion of high-salinity shelf water produced by polynya activity in TNB that flows into the cavity beneath NIS toward the deep grounding line. Of the total melting rate of NIS in winter, 36% comes from regions near the grounding line. In addition, the contributions of tides and realistic cavity geometry to NIS basal melting are identified by conducting sensitivity experiments. Tidal effects increase the melting of NIS throughout the year, particularly contributing as much as 30% to the areas of ice draft shallower than 200 m in summer. Sensitivity results for uncertainty in cavity geometry show that spurious vertical mixing can be locally induced and enhanced by interaction between tides and the unrealistic topography, resulting in excessive ... Dataset Antarc* Antarctica East Antarctica Ice Shelf Ice Shelves Sea ice Frontiers: Figshare Austral East Antarctica Terra Nova Bay |
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 ocean-ice shelf interaction ocean-driven basal melt cold-water cavity ice shelf tracer experiments numerical simulation Antarctica |
spellingShingle |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering ocean-ice shelf interaction ocean-driven basal melt cold-water cavity ice shelf tracer experiments numerical simulation Antarctica Taekyun Kim Ji-Seok Hong Emilia Kyung Jin Jae-Hong Moon Sang-Keun Song Won Sang Lee DataSheet_1_Spatiotemporal variability in ocean-driven basal melting of cold-water cavity ice shelf in Terra Nova Bay, East Antarctica: roles of tide and cavity geometry.docx |
topic_facet |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering ocean-ice shelf interaction ocean-driven basal melt cold-water cavity ice shelf tracer experiments numerical simulation Antarctica |
description |
Mass loss from ice shelves occurs through ocean-driven melting regulated by dynamic and thermodynamic processes in sub-ice shelf cavities. However, the understanding of these oceanic processes is quite limited because of the scant observations under ice shelves. Here, a regional coupled sea-ice/ocean model that includes physical interactions between the ocean and the ice shelf is used as an alternative tool for exploring ocean-driven melting beneath the Nansen Ice Shelf (NIS) which is a cold-water cavity ice shelf located beside Terra Nova Bay (TNB) in East Antarctica. For the first time, this study identifies the spatiotemporal variability signatures for different modes of ocean-driven melting at the base of NIS. In February (austral summer), basal melting substantially increases where the ice shelf draft is relatively small in the vicinity of the ice shelf front, contributing 78% of the total NIS melting rate. As the dominant source of NIS mass loss, this melting is driven by tide-induced turbulent mixing along the sloping ice shelf base and summer warm surface water intruding beneath and reaching the shallow parts of the ice shelf. In contrast, the NIS has relatively high basal melting rates near the grounding line in September (austral winter) primarily because of the intrusion of high-salinity shelf water produced by polynya activity in TNB that flows into the cavity beneath NIS toward the deep grounding line. Of the total melting rate of NIS in winter, 36% comes from regions near the grounding line. In addition, the contributions of tides and realistic cavity geometry to NIS basal melting are identified by conducting sensitivity experiments. Tidal effects increase the melting of NIS throughout the year, particularly contributing as much as 30% to the areas of ice draft shallower than 200 m in summer. Sensitivity results for uncertainty in cavity geometry show that spurious vertical mixing can be locally induced and enhanced by interaction between tides and the unrealistic topography, resulting in excessive ... |
format |
Dataset |
author |
Taekyun Kim Ji-Seok Hong Emilia Kyung Jin Jae-Hong Moon Sang-Keun Song Won Sang Lee |
author_facet |
Taekyun Kim Ji-Seok Hong Emilia Kyung Jin Jae-Hong Moon Sang-Keun Song Won Sang Lee |
author_sort |
Taekyun Kim |
title |
DataSheet_1_Spatiotemporal variability in ocean-driven basal melting of cold-water cavity ice shelf in Terra Nova Bay, East Antarctica: roles of tide and cavity geometry.docx |
title_short |
DataSheet_1_Spatiotemporal variability in ocean-driven basal melting of cold-water cavity ice shelf in Terra Nova Bay, East Antarctica: roles of tide and cavity geometry.docx |
title_full |
DataSheet_1_Spatiotemporal variability in ocean-driven basal melting of cold-water cavity ice shelf in Terra Nova Bay, East Antarctica: roles of tide and cavity geometry.docx |
title_fullStr |
DataSheet_1_Spatiotemporal variability in ocean-driven basal melting of cold-water cavity ice shelf in Terra Nova Bay, East Antarctica: roles of tide and cavity geometry.docx |
title_full_unstemmed |
DataSheet_1_Spatiotemporal variability in ocean-driven basal melting of cold-water cavity ice shelf in Terra Nova Bay, East Antarctica: roles of tide and cavity geometry.docx |
title_sort |
datasheet_1_spatiotemporal variability in ocean-driven basal melting of cold-water cavity ice shelf in terra nova bay, east antarctica: roles of tide and cavity geometry.docx |
publishDate |
2023 |
url |
https://doi.org/10.3389/fmars.2023.1249562.s001 https://figshare.com/articles/dataset/DataSheet_1_Spatiotemporal_variability_in_ocean-driven_basal_melting_of_cold-water_cavity_ice_shelf_in_Terra_Nova_Bay_East_Antarctica_roles_of_tide_and_cavity_geometry_docx/24159816 |
geographic |
Austral East Antarctica Terra Nova Bay |
geographic_facet |
Austral East Antarctica Terra Nova Bay |
genre |
Antarc* Antarctica East Antarctica Ice Shelf Ice Shelves Sea ice |
genre_facet |
Antarc* Antarctica East Antarctica Ice Shelf Ice Shelves Sea ice |
op_relation |
doi:10.3389/fmars.2023.1249562.s001 https://figshare.com/articles/dataset/DataSheet_1_Spatiotemporal_variability_in_ocean-driven_basal_melting_of_cold-water_cavity_ice_shelf_in_Terra_Nova_Bay_East_Antarctica_roles_of_tide_and_cavity_geometry_docx/24159816 |
op_rights |
CC BY 4.0 |
op_doi |
https://doi.org/10.3389/fmars.2023.1249562.s001 |
_version_ |
1809820227109650432 |