Recent variations in oceanic transports across the Greenland–Scotland Ridge
Oceanic exchanges across the Greenland–Scotland Ridge (GSR) play a crucial role in shaping the Arctic climate and linking with the Atlantic meridional overturning circulation. Most considered ocean reanalyses underestimate the observed 1993–2020 mean net inflow of warm and saline Atlantic Water of 8...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00069171 2023-11-05T03:39:49+01:00 Recent variations in oceanic transports across the Greenland–Scotland Ridge Mayer, Michael Tsubouchi, Takamasa Winkelbauer, Susanna Larsen, Karin Margretha H. Berx, Barbara Macrander, Andreas Iovino, Doroteaciro Jónsson, Steingrímur Renshaw, Richard 2023-09 electronic https://doi.org/10.5194/sp-1-osr7-14-2023 https://noa.gwlb.de/receive/cop_mods_00069171 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00067571/sp-1-osr7-14-2023.pdf https://sp.copernicus.org/articles/1-osr7/14/2023/sp-1-osr7-14-2023.pdf eng eng Copernicus Publications State of the planet -- https://www.state-of-the-planet.net/ -- 2752-0706 https://doi.org/10.5194/sp-1-osr7-14-2023 https://noa.gwlb.de/receive/cop_mods_00069171 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00067571/sp-1-osr7-14-2023.pdf https://sp.copernicus.org/articles/1-osr7/14/2023/sp-1-osr7-14-2023.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2023 ftnonlinearchiv https://doi.org/10.5194/sp-1-osr7-14-2023 2023-10-08T23:22:04Z Oceanic exchanges across the Greenland–Scotland Ridge (GSR) play a crucial role in shaping the Arctic climate and linking with the Atlantic meridional overturning circulation. Most considered ocean reanalyses underestimate the observed 1993–2020 mean net inflow of warm and saline Atlantic Water of 8.0 ± 0.5 Sv by up to 15 %, with reanalyses at 0.25∘ resolution additionally exhibiting larger biases in the single inflow branches compared to higher-resolution products. The underestimation of Atlantic Water inflow translates into a low bias in mean oceanic heat flux at the GSR of 5 %–22 % in reanalyses compared to the observed value of 280 ± 18 TW. Interannual variations in reanalysis transports correlate reasonably well with observed transports in most branches crossing the GSR. Observations and reanalyses with data assimilation show a marked reduction in oceanic heat flux across the GSR of 4 %–9 % (compared to 1993–2020 means) during a biennial (2-year-long) period centered on 2018, a record low for several products. The anomaly was associated with a temporary reduction in geostrophic Atlantic Water inflow through the Faroe–Shetland branch and was augmented by anomalously cool temperatures of Atlantic Water arriving at the GSR. The latter is linked to a recent strengthening of the North Atlantic subpolar gyre and illustrates the interplay of interannual and decadal changes in modulating transports at the GSR. Article in Journal/Newspaper Arctic Greenland Greenland-Scotland Ridge North Atlantic Niedersächsisches Online-Archiv NOA State of the Planet 1-osr7 1 13 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
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English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Mayer, Michael Tsubouchi, Takamasa Winkelbauer, Susanna Larsen, Karin Margretha H. Berx, Barbara Macrander, Andreas Iovino, Doroteaciro Jónsson, Steingrímur Renshaw, Richard Recent variations in oceanic transports across the Greenland–Scotland Ridge |
topic_facet |
article Verlagsveröffentlichung |
description |
Oceanic exchanges across the Greenland–Scotland Ridge (GSR) play a crucial role in shaping the Arctic climate and linking with the Atlantic meridional overturning circulation. Most considered ocean reanalyses underestimate the observed 1993–2020 mean net inflow of warm and saline Atlantic Water of 8.0 ± 0.5 Sv by up to 15 %, with reanalyses at 0.25∘ resolution additionally exhibiting larger biases in the single inflow branches compared to higher-resolution products. The underestimation of Atlantic Water inflow translates into a low bias in mean oceanic heat flux at the GSR of 5 %–22 % in reanalyses compared to the observed value of 280 ± 18 TW. Interannual variations in reanalysis transports correlate reasonably well with observed transports in most branches crossing the GSR. Observations and reanalyses with data assimilation show a marked reduction in oceanic heat flux across the GSR of 4 %–9 % (compared to 1993–2020 means) during a biennial (2-year-long) period centered on 2018, a record low for several products. The anomaly was associated with a temporary reduction in geostrophic Atlantic Water inflow through the Faroe–Shetland branch and was augmented by anomalously cool temperatures of Atlantic Water arriving at the GSR. The latter is linked to a recent strengthening of the North Atlantic subpolar gyre and illustrates the interplay of interannual and decadal changes in modulating transports at the GSR. |
format |
Article in Journal/Newspaper |
author |
Mayer, Michael Tsubouchi, Takamasa Winkelbauer, Susanna Larsen, Karin Margretha H. Berx, Barbara Macrander, Andreas Iovino, Doroteaciro Jónsson, Steingrímur Renshaw, Richard |
author_facet |
Mayer, Michael Tsubouchi, Takamasa Winkelbauer, Susanna Larsen, Karin Margretha H. Berx, Barbara Macrander, Andreas Iovino, Doroteaciro Jónsson, Steingrímur Renshaw, Richard |
author_sort |
Mayer, Michael |
title |
Recent variations in oceanic transports across the Greenland–Scotland Ridge |
title_short |
Recent variations in oceanic transports across the Greenland–Scotland Ridge |
title_full |
Recent variations in oceanic transports across the Greenland–Scotland Ridge |
title_fullStr |
Recent variations in oceanic transports across the Greenland–Scotland Ridge |
title_full_unstemmed |
Recent variations in oceanic transports across the Greenland–Scotland Ridge |
title_sort |
recent variations in oceanic transports across the greenland–scotland ridge |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/sp-1-osr7-14-2023 https://noa.gwlb.de/receive/cop_mods_00069171 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00067571/sp-1-osr7-14-2023.pdf https://sp.copernicus.org/articles/1-osr7/14/2023/sp-1-osr7-14-2023.pdf |
genre |
Arctic Greenland Greenland-Scotland Ridge North Atlantic |
genre_facet |
Arctic Greenland Greenland-Scotland Ridge North Atlantic |
op_relation |
State of the planet -- https://www.state-of-the-planet.net/ -- 2752-0706 https://doi.org/10.5194/sp-1-osr7-14-2023 https://noa.gwlb.de/receive/cop_mods_00069171 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00067571/sp-1-osr7-14-2023.pdf https://sp.copernicus.org/articles/1-osr7/14/2023/sp-1-osr7-14-2023.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/sp-1-osr7-14-2023 |
container_title |
State of the Planet |
container_volume |
1-osr7 |
container_start_page |
1 |
op_container_end_page |
13 |
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1781695745268645888 |