Table_3_Eddy and tidal driven basal melting of the Totten and Moscow University ice shelves.pdf
The mass loss from the neighboring Totten and Moscow University ice shelves is accelerating and may raise global sea levels in coming centuries. Totten Glacier is mostly based on bedrock below sea level, and so is vulnerable to warm water intrusion reducing its ice shelf buttressing. The mechanisms...
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ftfrontimediafig:oai:figshare.com:article/22566070 2023-05-15T16:41:50+02:00 Table_3_Eddy and tidal driven basal melting of the Totten and Moscow University ice shelves.pdf Yuwei Xia David E. Gwyther Ben Galton-Fenzi Eva A. Cougnon Alexander D. Fraser John C. Moore 2023-04-06T04:31:51Z https://doi.org/10.3389/fmars.2023.1159353.s005 https://figshare.com/articles/dataset/Table_3_Eddy_and_tidal_driven_basal_melting_of_the_Totten_and_Moscow_University_ice_shelves_pdf/22566070 unknown doi:10.3389/fmars.2023.1159353.s005 https://figshare.com/articles/dataset/Table_3_Eddy_and_tidal_driven_basal_melting_of_the_Totten_and_Moscow_University_ice_shelves_pdf/22566070 CC BY 4.0 Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering ice/ocean interaction wavelet coherence (WTC) heat transport eddy-resolving model Dataset 2023 ftfrontimediafig https://doi.org/10.3389/fmars.2023.1159353.s005 2023-04-12T23:12:53Z The mass loss from the neighboring Totten and Moscow University ice shelves is accelerating and may raise global sea levels in coming centuries. Totten Glacier is mostly based on bedrock below sea level, and so is vulnerable to warm water intrusion reducing its ice shelf buttressing. The mechanisms driving the ocean forced sub-ice-shelf melting remains to be further explored. In this study, we simulate oceanic-driven ice shelf melting of the Totten (TIS) and Moscow University ice shelves (MUIS) using a high spatiotemporal resolution model that resolves both eddy and tidal processes. We selected the year 2014 as representative of the period 1992 to 2017 to investigate how basal melting varies on spatial and temporal scales. We apply the wavelet coherence method to investigate the interactions between the two ice shelves in time-frequency space and hence estimate the contributions from tidal (<1.5 days) and eddy (2-35 days) components of the ocean heat transport to the basal melting of each ice shelf. In our simulation, the 2014 mean basal melt rate for TIS is 6.7 m yr -1 (42 Gt yr -1 ) and 9.7 m yr -1 (52 Gt yr -1 ) for MUIS. We find high wavelet coherence in the eddy dominated frequency band between the two ice shelves over almost the whole year. The wavelet coherence along five transects across the ice shelves suggests that TIS basal melting is dominated by eddy processes, while MUIS basal melting is dominated by tidal processes. The eddy-dominated basal melt for TIS is probably due to the large and convoluted bathymetric gradients beneath the ice shelf, weakening higher frequency tidal mode transport. This illustrates the key role of accurate bathymetric data plays in simulating on-going and future evolution of these important ice shelves. Dataset Ice Shelf Ice Shelves Totten Glacier Frontiers: Figshare Totten Glacier ENVELOPE(116.333,116.333,-66.833,-66.833) |
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/ocean interaction wavelet coherence (WTC) heat transport eddy-resolving model |
spellingShingle |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering ice/ocean interaction wavelet coherence (WTC) heat transport eddy-resolving model Yuwei Xia David E. Gwyther Ben Galton-Fenzi Eva A. Cougnon Alexander D. Fraser John C. Moore Table_3_Eddy and tidal driven basal melting of the Totten and Moscow University ice shelves.pdf |
topic_facet |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering ice/ocean interaction wavelet coherence (WTC) heat transport eddy-resolving model |
description |
The mass loss from the neighboring Totten and Moscow University ice shelves is accelerating and may raise global sea levels in coming centuries. Totten Glacier is mostly based on bedrock below sea level, and so is vulnerable to warm water intrusion reducing its ice shelf buttressing. The mechanisms driving the ocean forced sub-ice-shelf melting remains to be further explored. In this study, we simulate oceanic-driven ice shelf melting of the Totten (TIS) and Moscow University ice shelves (MUIS) using a high spatiotemporal resolution model that resolves both eddy and tidal processes. We selected the year 2014 as representative of the period 1992 to 2017 to investigate how basal melting varies on spatial and temporal scales. We apply the wavelet coherence method to investigate the interactions between the two ice shelves in time-frequency space and hence estimate the contributions from tidal (<1.5 days) and eddy (2-35 days) components of the ocean heat transport to the basal melting of each ice shelf. In our simulation, the 2014 mean basal melt rate for TIS is 6.7 m yr -1 (42 Gt yr -1 ) and 9.7 m yr -1 (52 Gt yr -1 ) for MUIS. We find high wavelet coherence in the eddy dominated frequency band between the two ice shelves over almost the whole year. The wavelet coherence along five transects across the ice shelves suggests that TIS basal melting is dominated by eddy processes, while MUIS basal melting is dominated by tidal processes. The eddy-dominated basal melt for TIS is probably due to the large and convoluted bathymetric gradients beneath the ice shelf, weakening higher frequency tidal mode transport. This illustrates the key role of accurate bathymetric data plays in simulating on-going and future evolution of these important ice shelves. |
format |
Dataset |
author |
Yuwei Xia David E. Gwyther Ben Galton-Fenzi Eva A. Cougnon Alexander D. Fraser John C. Moore |
author_facet |
Yuwei Xia David E. Gwyther Ben Galton-Fenzi Eva A. Cougnon Alexander D. Fraser John C. Moore |
author_sort |
Yuwei Xia |
title |
Table_3_Eddy and tidal driven basal melting of the Totten and Moscow University ice shelves.pdf |
title_short |
Table_3_Eddy and tidal driven basal melting of the Totten and Moscow University ice shelves.pdf |
title_full |
Table_3_Eddy and tidal driven basal melting of the Totten and Moscow University ice shelves.pdf |
title_fullStr |
Table_3_Eddy and tidal driven basal melting of the Totten and Moscow University ice shelves.pdf |
title_full_unstemmed |
Table_3_Eddy and tidal driven basal melting of the Totten and Moscow University ice shelves.pdf |
title_sort |
table_3_eddy and tidal driven basal melting of the totten and moscow university ice shelves.pdf |
publishDate |
2023 |
url |
https://doi.org/10.3389/fmars.2023.1159353.s005 https://figshare.com/articles/dataset/Table_3_Eddy_and_tidal_driven_basal_melting_of_the_Totten_and_Moscow_University_ice_shelves_pdf/22566070 |
long_lat |
ENVELOPE(116.333,116.333,-66.833,-66.833) |
geographic |
Totten Glacier |
geographic_facet |
Totten Glacier |
genre |
Ice Shelf Ice Shelves Totten Glacier |
genre_facet |
Ice Shelf Ice Shelves Totten Glacier |
op_relation |
doi:10.3389/fmars.2023.1159353.s005 https://figshare.com/articles/dataset/Table_3_Eddy_and_tidal_driven_basal_melting_of_the_Totten_and_Moscow_University_ice_shelves_pdf/22566070 |
op_rights |
CC BY 4.0 |
op_doi |
https://doi.org/10.3389/fmars.2023.1159353.s005 |
_version_ |
1766032312245420032 |