A subannual subsurface pathway from the Gulf Stream to the Subpolar Gyre and its role in warming and salinification in the 1990s
The transport of warm, saline subtropical water to the subpolar gyre (SPG) in the North Atlantic has been the subject of a range of Lagrangian studies, establishing intergyre exchange on timescales of 2–7 years, with greater subsurface throughflow. Here calculating particle trajectories in a high‐re...
Published in: | Geophysical Research Letters |
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2019
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Online Access: | http://nora.nerc.ac.uk/id/eprint/524819/ https://nora.nerc.ac.uk/id/eprint/524819/1/Jacobs_et_al-2019-Geophysical_Research_Letters.pdf https://doi.org/10.1029/2019GL083021 |
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ftnerc:oai:nora.nerc.ac.uk:524819 2023-05-15T17:29:28+02:00 A subannual subsurface pathway from the Gulf Stream to the Subpolar Gyre and its role in warming and salinification in the 1990s Jacobs, Zoe L. Grist, Jeremy P. Marsh, Robert Josey, Simon A. 2019-07-23 text http://nora.nerc.ac.uk/id/eprint/524819/ https://nora.nerc.ac.uk/id/eprint/524819/1/Jacobs_et_al-2019-Geophysical_Research_Letters.pdf https://doi.org/10.1029/2019GL083021 en eng https://nora.nerc.ac.uk/id/eprint/524819/1/Jacobs_et_al-2019-Geophysical_Research_Letters.pdf Jacobs, Zoe L. orcid:0000-0001-7348-0699 Grist, Jeremy P. orcid:0000-0003-1068-9211 Marsh, Robert; Josey, Simon A. orcid:0000-0002-1683-8831 . 2019 A subannual subsurface pathway from the Gulf Stream to the Subpolar Gyre and its role in warming and salinification in the 1990s. Geophysical Research Letters, 46 (13). https://doi.org/10.1029/2019GL083021 <https://doi.org/10.1029/2019GL083021> cc_by_4 CC-BY Publication - Article PeerReviewed 2019 ftnerc https://doi.org/10.1029/2019GL083021 2023-02-04T19:49:04Z The transport of warm, saline subtropical water to the subpolar gyre (SPG) in the North Atlantic has been the subject of a range of Lagrangian studies, establishing intergyre exchange on timescales of 2–7 years, with greater subsurface throughflow. Here calculating particle trajectories in a high‐resolution, global hindcast, we present new evidence for a direct, subsurface pathway to the SPG from the Gulf Stream (GS) on subannual timescales. The pathway is most evident for particles initially at 200‐m depth in the GS and is enhanced after a prolonged period of positive North Atlantic Oscillation. This occurred in the mid‐1990s and led to warming and salinification of the western SPG consistent with observations. The more realistic advective pathways and timescales in the high‐resolution model enable, for the first time, attribution of temperature and salinity changes in the SPG to a direct influx of GS water. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Natural Environment Research Council: NERC Open Research Archive Geophysical Research Letters 46 13 7518 7526 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
The transport of warm, saline subtropical water to the subpolar gyre (SPG) in the North Atlantic has been the subject of a range of Lagrangian studies, establishing intergyre exchange on timescales of 2–7 years, with greater subsurface throughflow. Here calculating particle trajectories in a high‐resolution, global hindcast, we present new evidence for a direct, subsurface pathway to the SPG from the Gulf Stream (GS) on subannual timescales. The pathway is most evident for particles initially at 200‐m depth in the GS and is enhanced after a prolonged period of positive North Atlantic Oscillation. This occurred in the mid‐1990s and led to warming and salinification of the western SPG consistent with observations. The more realistic advective pathways and timescales in the high‐resolution model enable, for the first time, attribution of temperature and salinity changes in the SPG to a direct influx of GS water. |
format |
Article in Journal/Newspaper |
author |
Jacobs, Zoe L. Grist, Jeremy P. Marsh, Robert Josey, Simon A. |
spellingShingle |
Jacobs, Zoe L. Grist, Jeremy P. Marsh, Robert Josey, Simon A. A subannual subsurface pathway from the Gulf Stream to the Subpolar Gyre and its role in warming and salinification in the 1990s |
author_facet |
Jacobs, Zoe L. Grist, Jeremy P. Marsh, Robert Josey, Simon A. |
author_sort |
Jacobs, Zoe L. |
title |
A subannual subsurface pathway from the Gulf Stream to the Subpolar Gyre and its role in warming and salinification in the 1990s |
title_short |
A subannual subsurface pathway from the Gulf Stream to the Subpolar Gyre and its role in warming and salinification in the 1990s |
title_full |
A subannual subsurface pathway from the Gulf Stream to the Subpolar Gyre and its role in warming and salinification in the 1990s |
title_fullStr |
A subannual subsurface pathway from the Gulf Stream to the Subpolar Gyre and its role in warming and salinification in the 1990s |
title_full_unstemmed |
A subannual subsurface pathway from the Gulf Stream to the Subpolar Gyre and its role in warming and salinification in the 1990s |
title_sort |
subannual subsurface pathway from the gulf stream to the subpolar gyre and its role in warming and salinification in the 1990s |
publishDate |
2019 |
url |
http://nora.nerc.ac.uk/id/eprint/524819/ https://nora.nerc.ac.uk/id/eprint/524819/1/Jacobs_et_al-2019-Geophysical_Research_Letters.pdf https://doi.org/10.1029/2019GL083021 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
https://nora.nerc.ac.uk/id/eprint/524819/1/Jacobs_et_al-2019-Geophysical_Research_Letters.pdf Jacobs, Zoe L. orcid:0000-0001-7348-0699 Grist, Jeremy P. orcid:0000-0003-1068-9211 Marsh, Robert; Josey, Simon A. orcid:0000-0002-1683-8831 . 2019 A subannual subsurface pathway from the Gulf Stream to the Subpolar Gyre and its role in warming and salinification in the 1990s. Geophysical Research Letters, 46 (13). https://doi.org/10.1029/2019GL083021 <https://doi.org/10.1029/2019GL083021> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2019GL083021 |
container_title |
Geophysical Research Letters |
container_volume |
46 |
container_issue |
13 |
container_start_page |
7518 |
op_container_end_page |
7526 |
_version_ |
1766123601028710400 |