Dissipation and bathymetric sensitivities in an unstructured mesh global tidal model
The mechanisms and geographic distribution of global tidal dissipation in barotropic tidal models are examined using a high resolution unstructured mesh finite element model. Mesh resolution varies between 2 and 25 km and is especially focused on inner shelves and steep bathymetric gradients. Tidal...
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ftncar:oai:drupal-site.org:articles_25416 2024-04-14T08:12:50+00:00 Dissipation and bathymetric sensitivities in an unstructured mesh global tidal model Blakely, Coleman P. (author) Ling, Guoming (author) Pringle, William J. (author) Contreras, MarÃa Teresa (author) Wirasaet, Damrongsak (author) Westerink, Joannes J. (author) Moghimi, Saeed (author) Seroka, Greg (author) Shi, Lei (author) Myers, Edward (author) Owensby, Margaret (author) Massey, Chris (author) 2022-05 https://doi.org/10.1029/2021JC018178 en eng Journal of Geophysical Research: Oceans--JGR Oceans--2169-9275--2169-9291 An update to Greenland and Antarctic ice sheet topography, cavity geometry, and global bathymetry (RTopo-2.0.4)--10.1594/PANGAEA.905295 The GEBCO_2019 Grid - a continuous terrain model of the global oceans and land.--10.5285/836f016a-33be-6ddc-e053-6c86abc0788e articles:25416 doi:10.1029/2021JC018178 ark:/85065/d7j67mns Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. article Text 2022 ftncar https://doi.org/10.1029/2021JC018178 2024-03-21T18:00:26Z The mechanisms and geographic distribution of global tidal dissipation in barotropic tidal models are examined using a high resolution unstructured mesh finite element model. Mesh resolution varies between 2 and 25 km and is especially focused on inner shelves and steep bathymetric gradients. Tidal response sensitivities to bathymetric changes are examined to put into context response sensitivities to frictional processes. We confirm that the Ronne Ice Shelf dramatically affects Atlantic tides but also find that bathymetry in the Hudson Bay system is a critical control. We follow a sequential frictional parameter optimization process and use TPXO9 data-assimilated tidal elevations as a reference solution. From simulated velocities and depths, dissipation within the global model is estimated and allows us to pinpoint dissipation at high resolution. Boundary layer dissipation is extremely focused with 1.4% of the ocean accounting for 90% of the total. Internal tide friction is much more distributed with 16.7% of the ocean accounting for 90% of the total. Often highly regional dissipation can impact basin-scale and even ocean wide tides. Optimized boundary layer friction parameters correlate very well with the physical characteristics of the locality with high friction factors associated with energetic tidal regions, deep ocean island chains, and ice covered areas. Global complex M-2 tide errors are 1.94 cm in deep waters. Total global boundary layer and internal tide dissipation are estimated, respectively, at 1.83 and 1.49 TW. This continues the trend in the literature toward attributing more dissipation to internal tides. NA19OAR0220123 Article in Journal/Newspaper Hudson Bay Ice Shelf Ronne Ice Shelf ice covered areas Ocean Island OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Hudson Hudson Bay Ronne Ice Shelf ENVELOPE(-61.000,-61.000,-78.500,-78.500) Journal of Geophysical Research: Oceans 127 5 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
The mechanisms and geographic distribution of global tidal dissipation in barotropic tidal models are examined using a high resolution unstructured mesh finite element model. Mesh resolution varies between 2 and 25 km and is especially focused on inner shelves and steep bathymetric gradients. Tidal response sensitivities to bathymetric changes are examined to put into context response sensitivities to frictional processes. We confirm that the Ronne Ice Shelf dramatically affects Atlantic tides but also find that bathymetry in the Hudson Bay system is a critical control. We follow a sequential frictional parameter optimization process and use TPXO9 data-assimilated tidal elevations as a reference solution. From simulated velocities and depths, dissipation within the global model is estimated and allows us to pinpoint dissipation at high resolution. Boundary layer dissipation is extremely focused with 1.4% of the ocean accounting for 90% of the total. Internal tide friction is much more distributed with 16.7% of the ocean accounting for 90% of the total. Often highly regional dissipation can impact basin-scale and even ocean wide tides. Optimized boundary layer friction parameters correlate very well with the physical characteristics of the locality with high friction factors associated with energetic tidal regions, deep ocean island chains, and ice covered areas. Global complex M-2 tide errors are 1.94 cm in deep waters. Total global boundary layer and internal tide dissipation are estimated, respectively, at 1.83 and 1.49 TW. This continues the trend in the literature toward attributing more dissipation to internal tides. NA19OAR0220123 |
author2 |
Blakely, Coleman P. (author) Ling, Guoming (author) Pringle, William J. (author) Contreras, MarÃa Teresa (author) Wirasaet, Damrongsak (author) Westerink, Joannes J. (author) Moghimi, Saeed (author) Seroka, Greg (author) Shi, Lei (author) Myers, Edward (author) Owensby, Margaret (author) Massey, Chris (author) |
format |
Article in Journal/Newspaper |
title |
Dissipation and bathymetric sensitivities in an unstructured mesh global tidal model |
spellingShingle |
Dissipation and bathymetric sensitivities in an unstructured mesh global tidal model |
title_short |
Dissipation and bathymetric sensitivities in an unstructured mesh global tidal model |
title_full |
Dissipation and bathymetric sensitivities in an unstructured mesh global tidal model |
title_fullStr |
Dissipation and bathymetric sensitivities in an unstructured mesh global tidal model |
title_full_unstemmed |
Dissipation and bathymetric sensitivities in an unstructured mesh global tidal model |
title_sort |
dissipation and bathymetric sensitivities in an unstructured mesh global tidal model |
publishDate |
2022 |
url |
https://doi.org/10.1029/2021JC018178 |
long_lat |
ENVELOPE(-61.000,-61.000,-78.500,-78.500) |
geographic |
Hudson Hudson Bay Ronne Ice Shelf |
geographic_facet |
Hudson Hudson Bay Ronne Ice Shelf |
genre |
Hudson Bay Ice Shelf Ronne Ice Shelf ice covered areas Ocean Island |
genre_facet |
Hudson Bay Ice Shelf Ronne Ice Shelf ice covered areas Ocean Island |
op_relation |
Journal of Geophysical Research: Oceans--JGR Oceans--2169-9275--2169-9291 An update to Greenland and Antarctic ice sheet topography, cavity geometry, and global bathymetry (RTopo-2.0.4)--10.1594/PANGAEA.905295 The GEBCO_2019 Grid - a continuous terrain model of the global oceans and land.--10.5285/836f016a-33be-6ddc-e053-6c86abc0788e articles:25416 doi:10.1029/2021JC018178 ark:/85065/d7j67mns |
op_rights |
Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. |
op_doi |
https://doi.org/10.1029/2021JC018178 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
127 |
container_issue |
5 |
_version_ |
1796310680672927744 |