Dense water formation on the Icelandic shelf and its contribution to the North Icelandic Jet
The North Icelandic Jet (NIJ) is the densest component of the Denmark Strait Overflow Water, feeding the abyssal limb of the Atlantic Meridional Overturning Circulation. Here, by using observational and numerical model data, we explore the formation of overflow water on the Icelandic shelf, the mech...
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ftunivalberta:oai:era.library.ualberta.ca:e4ee7ce6-aba7-462a-96e3-2e08083607cb 2024-06-23T07:52:21+00:00 Dense water formation on the Icelandic shelf and its contribution to the North Icelandic Jet Garcia-Quintana, Yarisbel Grivault, Nathan Hu, Xianmin Myers, Paul G. 2021-01-01 https://era.library.ualberta.ca/items/e4ee7ce6-aba7-462a-96e3-2e08083607cb https://doi.org/10.7939/r3-ppxj-2f90 English eng https://era.library.ualberta.ca/items/e4ee7ce6-aba7-462a-96e3-2e08083607cb doi:10.7939/r3-ppxj-2f90 © 2021. American Geophysical Union. All Rights Reserved. North Icelandic Jet Shelf convection DSOW Numerical modeling Article (Published) 2021 ftunivalberta https://doi.org/10.7939/r3-ppxj-2f90 2024-06-03T03:09:00Z The North Icelandic Jet (NIJ) is the densest component of the Denmark Strait Overflow Water, feeding the abyssal limb of the Atlantic Meridional Overturning Circulation. Here, by using observational and numerical model data, we explore the formation of overflow water on the Icelandic shelf, the mechanisms involved, and its potential contribution to the NIJ. The sparse observational data on the western Icelandic shelf for the month of February shows top-to-bottom mixing on the shelf, distinct and well separated from the dense water offshore, with densities larger than 27.8 kg/m3 in some years. Using a 1-D mixing model and winter heat flux reanalysis, we suggest that waters with densities exceeding 27.8 kg/m3 are likely to be formed on the shelf in most years by the end of winter. High-resolution numerical model data shows that the transformation of the Atlantic inflow along the northwest Icelandic shelf generates a dense plume whose waters feed into the NIJ. The bulk of the plume cascades downslope north of Iceland, funneled through deep cross-shelf troughs, with some cascading occurring west of Iceland as well. During years of strong cascading events (2008, 2013, and 2016), the modeled dense plume potentially feeds up to 21% of the NIJ transport at the Siglunes and Kögur sections. Back-tracked Lagrangian particle trajectories confirm that the western Icelandic shelf is a source of the NIJ. The dense plume transport and variability are found to be dependent on the total oceanic heat loss west of Iceland and along Denmark Strait. Article in Journal/Newspaper Denmark Strait Iceland University of Alberta: Era - Education and Research Archive Kögur ENVELOPE(-13.732,-13.732,65.358,65.358) |
institution |
Open Polar |
collection |
University of Alberta: Era - Education and Research Archive |
op_collection_id |
ftunivalberta |
language |
English |
topic |
North Icelandic Jet Shelf convection DSOW Numerical modeling |
spellingShingle |
North Icelandic Jet Shelf convection DSOW Numerical modeling Garcia-Quintana, Yarisbel Grivault, Nathan Hu, Xianmin Myers, Paul G. Dense water formation on the Icelandic shelf and its contribution to the North Icelandic Jet |
topic_facet |
North Icelandic Jet Shelf convection DSOW Numerical modeling |
description |
The North Icelandic Jet (NIJ) is the densest component of the Denmark Strait Overflow Water, feeding the abyssal limb of the Atlantic Meridional Overturning Circulation. Here, by using observational and numerical model data, we explore the formation of overflow water on the Icelandic shelf, the mechanisms involved, and its potential contribution to the NIJ. The sparse observational data on the western Icelandic shelf for the month of February shows top-to-bottom mixing on the shelf, distinct and well separated from the dense water offshore, with densities larger than 27.8 kg/m3 in some years. Using a 1-D mixing model and winter heat flux reanalysis, we suggest that waters with densities exceeding 27.8 kg/m3 are likely to be formed on the shelf in most years by the end of winter. High-resolution numerical model data shows that the transformation of the Atlantic inflow along the northwest Icelandic shelf generates a dense plume whose waters feed into the NIJ. The bulk of the plume cascades downslope north of Iceland, funneled through deep cross-shelf troughs, with some cascading occurring west of Iceland as well. During years of strong cascading events (2008, 2013, and 2016), the modeled dense plume potentially feeds up to 21% of the NIJ transport at the Siglunes and Kögur sections. Back-tracked Lagrangian particle trajectories confirm that the western Icelandic shelf is a source of the NIJ. The dense plume transport and variability are found to be dependent on the total oceanic heat loss west of Iceland and along Denmark Strait. |
format |
Article in Journal/Newspaper |
author |
Garcia-Quintana, Yarisbel Grivault, Nathan Hu, Xianmin Myers, Paul G. |
author_facet |
Garcia-Quintana, Yarisbel Grivault, Nathan Hu, Xianmin Myers, Paul G. |
author_sort |
Garcia-Quintana, Yarisbel |
title |
Dense water formation on the Icelandic shelf and its contribution to the North Icelandic Jet |
title_short |
Dense water formation on the Icelandic shelf and its contribution to the North Icelandic Jet |
title_full |
Dense water formation on the Icelandic shelf and its contribution to the North Icelandic Jet |
title_fullStr |
Dense water formation on the Icelandic shelf and its contribution to the North Icelandic Jet |
title_full_unstemmed |
Dense water formation on the Icelandic shelf and its contribution to the North Icelandic Jet |
title_sort |
dense water formation on the icelandic shelf and its contribution to the north icelandic jet |
publishDate |
2021 |
url |
https://era.library.ualberta.ca/items/e4ee7ce6-aba7-462a-96e3-2e08083607cb https://doi.org/10.7939/r3-ppxj-2f90 |
long_lat |
ENVELOPE(-13.732,-13.732,65.358,65.358) |
geographic |
Kögur |
geographic_facet |
Kögur |
genre |
Denmark Strait Iceland |
genre_facet |
Denmark Strait Iceland |
op_relation |
https://era.library.ualberta.ca/items/e4ee7ce6-aba7-462a-96e3-2e08083607cb doi:10.7939/r3-ppxj-2f90 |
op_rights |
© 2021. American Geophysical Union. All Rights Reserved. |
op_doi |
https://doi.org/10.7939/r3-ppxj-2f90 |
_version_ |
1802643631093317632 |