Modeling ocean eddies on Antarctica's cold water continental shelves and their effects on ice shelf basal melting
Author Posting. © American Geophysical Union, 2019. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research-Oceans 124(7), (2019): 5067-5084, doi:10.1029/2018JC014688. Ch...
Published in: | Journal of Geophysical Research: Oceans |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
American Geophysical Union
2019
|
Subjects: | |
Online Access: | https://hdl.handle.net/1912/24825 |
id |
ftwhoas:oai:darchive.mblwhoilibrary.org:1912/24825 |
---|---|
record_format |
openpolar |
spelling |
ftwhoas:oai:darchive.mblwhoilibrary.org:1912/24825 2023-05-15T13:48:31+02:00 Modeling ocean eddies on Antarctica's cold water continental shelves and their effects on ice shelf basal melting Mack, Stefanie L. Dinniman, Michael S. Klinck, John M. McGillicuddy, Dennis J. Padman, Laurence 2019-07-04 https://hdl.handle.net/1912/24825 unknown American Geophysical Union https://doi.org/10.1029/2018JC014688 Mack, S. L., Dinniman, M. S., Klinck, J. M., McGillicuddy, D. J., Jr., & Padman, L. (2019). Modeling ocean eddies on Antarctica's cold water continental shelves and their effects on ice shelf basal melting. Journal of Geophysical Research-Oceans, 124(7), 5067-5084. https://hdl.handle.net/1912/24825 doi:10.1029/2018JC014688 Mack, S. L., Dinniman, M. S., Klinck, J. M., McGillicuddy, D. J., Jr., & Padman, L. (2019). Modeling ocean eddies on Antarctica's cold water continental shelves and their effects on ice shelf basal melting. Journal of Geophysical Research-Oceans, 124(7), 5067-5084. doi:10.1029/2018JC014688 Article 2019 ftwhoas https://doi.org/10.1029/2018JC014688 2022-05-28T23:03:21Z Author Posting. © American Geophysical Union, 2019. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research-Oceans 124(7), (2019): 5067-5084, doi:10.1029/2018JC014688. Changes in the rate of ocean‐driven basal melting of Antarctica's ice shelves can alter the rate at which the grounded ice sheet loses mass and contributes to sea level change. Melt rates depend on the inflow of ocean heat, which occurs through steady circulation and eddy fluxes. Previous studies have demonstrated the importance of eddy fluxes for ice shelves affected by relatively warm intrusions of Circumpolar Deep Water. However, ice shelves on cold water continental shelves primarily melt from dense shelf water near the grounding line and from light surface water at the ice shelf front. Eddy effects on basal melt of these ice shelves have not been studied. We investigate where and when a regional ocean model of the Ross Sea resolves eddies and determine the effect of eddy processes on basal melt. The size of the eddies formed depends on water column stratification and latitude. We use simulations at horizontal grid resolutions of 5 and 1.5 km and, in the 1.5‐km model, vary the degree of topography smoothing. The higher‐resolution models generate about 2–2.5 times as many eddies as the low‐resolution model. In all simulations, eddies cross the ice shelf front in both directions. However, there is no significant change in basal melt between low‐ and high‐resolution simulations. We conclude that higher‐resolution models (<1 km) are required to better represent eddies in the Ross Sea but hypothesize that basal melt of the Ross Ice Shelf is relatively insensitive to our ability to fully resolve the eddy field. This research was funded by NSF's Antarctic Research Program (ANT‐0944174, ANT‐0944165, and ANT‐1443677), Ocean Sciences Program (OCE‐1357522), and by the Future of Ice Initiative at the University of ... Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves Ross Ice Shelf Ross Sea Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Antarctic Ross Ice Shelf Ross Sea Journal of Geophysical Research: Oceans 124 7 5067 5084 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
unknown |
description |
Author Posting. © American Geophysical Union, 2019. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research-Oceans 124(7), (2019): 5067-5084, doi:10.1029/2018JC014688. Changes in the rate of ocean‐driven basal melting of Antarctica's ice shelves can alter the rate at which the grounded ice sheet loses mass and contributes to sea level change. Melt rates depend on the inflow of ocean heat, which occurs through steady circulation and eddy fluxes. Previous studies have demonstrated the importance of eddy fluxes for ice shelves affected by relatively warm intrusions of Circumpolar Deep Water. However, ice shelves on cold water continental shelves primarily melt from dense shelf water near the grounding line and from light surface water at the ice shelf front. Eddy effects on basal melt of these ice shelves have not been studied. We investigate where and when a regional ocean model of the Ross Sea resolves eddies and determine the effect of eddy processes on basal melt. The size of the eddies formed depends on water column stratification and latitude. We use simulations at horizontal grid resolutions of 5 and 1.5 km and, in the 1.5‐km model, vary the degree of topography smoothing. The higher‐resolution models generate about 2–2.5 times as many eddies as the low‐resolution model. In all simulations, eddies cross the ice shelf front in both directions. However, there is no significant change in basal melt between low‐ and high‐resolution simulations. We conclude that higher‐resolution models (<1 km) are required to better represent eddies in the Ross Sea but hypothesize that basal melt of the Ross Ice Shelf is relatively insensitive to our ability to fully resolve the eddy field. This research was funded by NSF's Antarctic Research Program (ANT‐0944174, ANT‐0944165, and ANT‐1443677), Ocean Sciences Program (OCE‐1357522), and by the Future of Ice Initiative at the University of ... |
format |
Article in Journal/Newspaper |
author |
Mack, Stefanie L. Dinniman, Michael S. Klinck, John M. McGillicuddy, Dennis J. Padman, Laurence |
spellingShingle |
Mack, Stefanie L. Dinniman, Michael S. Klinck, John M. McGillicuddy, Dennis J. Padman, Laurence Modeling ocean eddies on Antarctica's cold water continental shelves and their effects on ice shelf basal melting |
author_facet |
Mack, Stefanie L. Dinniman, Michael S. Klinck, John M. McGillicuddy, Dennis J. Padman, Laurence |
author_sort |
Mack, Stefanie L. |
title |
Modeling ocean eddies on Antarctica's cold water continental shelves and their effects on ice shelf basal melting |
title_short |
Modeling ocean eddies on Antarctica's cold water continental shelves and their effects on ice shelf basal melting |
title_full |
Modeling ocean eddies on Antarctica's cold water continental shelves and their effects on ice shelf basal melting |
title_fullStr |
Modeling ocean eddies on Antarctica's cold water continental shelves and their effects on ice shelf basal melting |
title_full_unstemmed |
Modeling ocean eddies on Antarctica's cold water continental shelves and their effects on ice shelf basal melting |
title_sort |
modeling ocean eddies on antarctica's cold water continental shelves and their effects on ice shelf basal melting |
publisher |
American Geophysical Union |
publishDate |
2019 |
url |
https://hdl.handle.net/1912/24825 |
geographic |
Antarctic Ross Ice Shelf Ross Sea |
geographic_facet |
Antarctic Ross Ice Shelf Ross Sea |
genre |
Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves Ross Ice Shelf Ross Sea |
genre_facet |
Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves Ross Ice Shelf Ross Sea |
op_source |
Mack, S. L., Dinniman, M. S., Klinck, J. M., McGillicuddy, D. J., Jr., & Padman, L. (2019). Modeling ocean eddies on Antarctica's cold water continental shelves and their effects on ice shelf basal melting. Journal of Geophysical Research-Oceans, 124(7), 5067-5084. doi:10.1029/2018JC014688 |
op_relation |
https://doi.org/10.1029/2018JC014688 Mack, S. L., Dinniman, M. S., Klinck, J. M., McGillicuddy, D. J., Jr., & Padman, L. (2019). Modeling ocean eddies on Antarctica's cold water continental shelves and their effects on ice shelf basal melting. Journal of Geophysical Research-Oceans, 124(7), 5067-5084. https://hdl.handle.net/1912/24825 doi:10.1029/2018JC014688 |
op_doi |
https://doi.org/10.1029/2018JC014688 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
124 |
container_issue |
7 |
container_start_page |
5067 |
op_container_end_page |
5084 |
_version_ |
1766249361724932096 |