Kinematic subduction rate of Labrador Sea Water from an eddy-permitting numerical model
We use an eddy-permitting, 1/12° regional configuration of the Nucleus for European Modelling of the Ocean (NEMO) model to examine water mass subduction rates in the Labrador Sea for the 2002–2013 period. An instantaneous kinematic subduction approach is implemented to calculate the subduction rate...
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ftunivalberta:oai:era.library.ualberta.ca:732999d9-0ea4-4203-b902-665046f99626 2024-06-23T07:54:26+00:00 Kinematic subduction rate of Labrador Sea Water from an eddy-permitting numerical model Courtois, Peggy Garcia-Quintana, Yarisbel Hu, Xianmin Myers, Paul G. 2020-01-01 https://era.library.ualberta.ca/items/732999d9-0ea4-4203-b902-665046f99626 https://doi.org/10.7939/r3-9t8h-ez96 English eng https://era.library.ualberta.ca/items/732999d9-0ea4-4203-b902-665046f99626 doi:10.7939/r3-9t8h-ez96 © 2020. American Geophysical Union. All Rights Reserved. Ocean modeling Labrador sea water Subduction rate Article (Published) 2020 ftunivalberta https://doi.org/10.7939/r3-9t8h-ez96 2024-06-03T03:09:00Z We use an eddy-permitting, 1/12° regional configuration of the Nucleus for European Modelling of the Ocean (NEMO) model to examine water mass subduction rates in the Labrador Sea for the 2002–2013 period. An instantaneous kinematic subduction approach is implemented to calculate the subduction rate of Labrador Sea Water (LSW). By following the outcrop positions of a given isopycncal range, we calculate the vertical transport of a water mass from the mixed layer into the permanent thermocline over the course of a year. We examine the importance of the various terms in this approach, including the evolution of the Mixed Layer Depth (MLD), the advection across the base of the Mixed Layer (ML), and the vertical velocity at the base of the ML. We find that the subduction rate is not greatly affected by the definition of the MLD, as long as the integration time is long enough for the subduction-obduction processes to balance each other. The total LSW subduction rate is ∼4–5 Sv, with similar rates for both Upper (ULSW) and Classical LSWs (CLSW), (∼2–2.5 Sv). After 2008, a shift in the LSW density is found in the simulation. CLSW reaches a maximum rate of 6 Sv in 2008, which is mainly inferred by the instantaneous ML change. Article in Journal/Newspaper Labrador Sea University of Alberta: Era - Education and Research Archive |
institution |
Open Polar |
collection |
University of Alberta: Era - Education and Research Archive |
op_collection_id |
ftunivalberta |
language |
English |
topic |
Ocean modeling Labrador sea water Subduction rate |
spellingShingle |
Ocean modeling Labrador sea water Subduction rate Courtois, Peggy Garcia-Quintana, Yarisbel Hu, Xianmin Myers, Paul G. Kinematic subduction rate of Labrador Sea Water from an eddy-permitting numerical model |
topic_facet |
Ocean modeling Labrador sea water Subduction rate |
description |
We use an eddy-permitting, 1/12° regional configuration of the Nucleus for European Modelling of the Ocean (NEMO) model to examine water mass subduction rates in the Labrador Sea for the 2002–2013 period. An instantaneous kinematic subduction approach is implemented to calculate the subduction rate of Labrador Sea Water (LSW). By following the outcrop positions of a given isopycncal range, we calculate the vertical transport of a water mass from the mixed layer into the permanent thermocline over the course of a year. We examine the importance of the various terms in this approach, including the evolution of the Mixed Layer Depth (MLD), the advection across the base of the Mixed Layer (ML), and the vertical velocity at the base of the ML. We find that the subduction rate is not greatly affected by the definition of the MLD, as long as the integration time is long enough for the subduction-obduction processes to balance each other. The total LSW subduction rate is ∼4–5 Sv, with similar rates for both Upper (ULSW) and Classical LSWs (CLSW), (∼2–2.5 Sv). After 2008, a shift in the LSW density is found in the simulation. CLSW reaches a maximum rate of 6 Sv in 2008, which is mainly inferred by the instantaneous ML change. |
format |
Article in Journal/Newspaper |
author |
Courtois, Peggy Garcia-Quintana, Yarisbel Hu, Xianmin Myers, Paul G. |
author_facet |
Courtois, Peggy Garcia-Quintana, Yarisbel Hu, Xianmin Myers, Paul G. |
author_sort |
Courtois, Peggy |
title |
Kinematic subduction rate of Labrador Sea Water from an eddy-permitting numerical model |
title_short |
Kinematic subduction rate of Labrador Sea Water from an eddy-permitting numerical model |
title_full |
Kinematic subduction rate of Labrador Sea Water from an eddy-permitting numerical model |
title_fullStr |
Kinematic subduction rate of Labrador Sea Water from an eddy-permitting numerical model |
title_full_unstemmed |
Kinematic subduction rate of Labrador Sea Water from an eddy-permitting numerical model |
title_sort |
kinematic subduction rate of labrador sea water from an eddy-permitting numerical model |
publishDate |
2020 |
url |
https://era.library.ualberta.ca/items/732999d9-0ea4-4203-b902-665046f99626 https://doi.org/10.7939/r3-9t8h-ez96 |
genre |
Labrador Sea |
genre_facet |
Labrador Sea |
op_relation |
https://era.library.ualberta.ca/items/732999d9-0ea4-4203-b902-665046f99626 doi:10.7939/r3-9t8h-ez96 |
op_rights |
© 2020. American Geophysical Union. All Rights Reserved. |
op_doi |
https://doi.org/10.7939/r3-9t8h-ez96 |
_version_ |
1802646583244750848 |