On the ocean's response to enhanced Greenland runoff in model experiments: relevance of mesoscale dynamics and atmospheric coupling
Increasing Greenland Ice Sheet melting is anticipated to impact water mass transformation in the subpolar North Atlantic and ultimately the meridional overturning circulation. Complex ocean and climate models are widely applied to estimate magnitude and timing of related impacts under global warming...
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Language: | English |
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Copernicus Publications
2023
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00065092 2023-05-15T16:25:53+02:00 On the ocean's response to enhanced Greenland runoff in model experiments: relevance of mesoscale dynamics and atmospheric coupling Martin, Torge Biastoch, Arne 2023-02 electronic https://doi.org/10.5194/os-19-141-2023 https://noa.gwlb.de/receive/cop_mods_00065092 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00063713/os-19-141-2023.pdf https://os.copernicus.org/articles/19/141/2023/os-19-141-2023.pdf eng eng Copernicus Publications Ocean Science -- http://www.bibliothek.uni-regensburg.de/ezeit/?2183769 -- http://www.copernicus.org/EGU/os/os.html -- 1812-0792 https://doi.org/10.5194/os-19-141-2023 https://noa.gwlb.de/receive/cop_mods_00065092 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00063713/os-19-141-2023.pdf https://os.copernicus.org/articles/19/141/2023/os-19-141-2023.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2023 ftnonlinearchiv https://doi.org/10.5194/os-19-141-2023 2023-02-27T00:14:44Z Increasing Greenland Ice Sheet melting is anticipated to impact water mass transformation in the subpolar North Atlantic and ultimately the meridional overturning circulation. Complex ocean and climate models are widely applied to estimate magnitude and timing of related impacts under global warming. We discuss the role of the ocean mean state, subpolar water mass transformation, mesoscale eddies, and atmospheric coupling in shaping the response of the subpolar North Atlantic Ocean to enhanced Greenland runoff. In a suite of eight dedicated 60- to 100-year-long model experiments with and without atmospheric coupling, with eddy processes parameterized and explicitly simulated and with regular and significantly enlarged Greenland runoff, we find (1) a major impact by the interactive atmosphere in enabling a compensating temperature feedback, (2) a non-negligible influence by the ocean mean state biased towards greater stability in the coupled simulations, both of which make the Atlantic meridional overturning circulation less susceptible to the freshwater perturbation applied, and (3) a more even spreading and deeper mixing of the runoff tracer in the subpolar North Atlantic and enhanced inter-gyre exchange with the subtropics in the strongly eddying simulations. Overall, our experiments demonstrate the important role of mesoscale ocean dynamics and atmosphere feedback in projections of the climate system response to enhanced Greenland Ice Sheet melting and hence underline the necessity to advance scale-aware eddy parameterizations for next-generation climate models. Article in Journal/Newspaper Greenland Ice Sheet North Atlantic Niedersächsisches Online-Archiv NOA Greenland Ocean Science 19 1 141 167 |
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Niedersächsisches Online-Archiv NOA |
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language |
English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Martin, Torge Biastoch, Arne On the ocean's response to enhanced Greenland runoff in model experiments: relevance of mesoscale dynamics and atmospheric coupling |
topic_facet |
article Verlagsveröffentlichung |
description |
Increasing Greenland Ice Sheet melting is anticipated to impact water mass transformation in the subpolar North Atlantic and ultimately the meridional overturning circulation. Complex ocean and climate models are widely applied to estimate magnitude and timing of related impacts under global warming. We discuss the role of the ocean mean state, subpolar water mass transformation, mesoscale eddies, and atmospheric coupling in shaping the response of the subpolar North Atlantic Ocean to enhanced Greenland runoff. In a suite of eight dedicated 60- to 100-year-long model experiments with and without atmospheric coupling, with eddy processes parameterized and explicitly simulated and with regular and significantly enlarged Greenland runoff, we find (1) a major impact by the interactive atmosphere in enabling a compensating temperature feedback, (2) a non-negligible influence by the ocean mean state biased towards greater stability in the coupled simulations, both of which make the Atlantic meridional overturning circulation less susceptible to the freshwater perturbation applied, and (3) a more even spreading and deeper mixing of the runoff tracer in the subpolar North Atlantic and enhanced inter-gyre exchange with the subtropics in the strongly eddying simulations. Overall, our experiments demonstrate the important role of mesoscale ocean dynamics and atmosphere feedback in projections of the climate system response to enhanced Greenland Ice Sheet melting and hence underline the necessity to advance scale-aware eddy parameterizations for next-generation climate models. |
format |
Article in Journal/Newspaper |
author |
Martin, Torge Biastoch, Arne |
author_facet |
Martin, Torge Biastoch, Arne |
author_sort |
Martin, Torge |
title |
On the ocean's response to enhanced Greenland runoff in model experiments: relevance of mesoscale dynamics and atmospheric coupling |
title_short |
On the ocean's response to enhanced Greenland runoff in model experiments: relevance of mesoscale dynamics and atmospheric coupling |
title_full |
On the ocean's response to enhanced Greenland runoff in model experiments: relevance of mesoscale dynamics and atmospheric coupling |
title_fullStr |
On the ocean's response to enhanced Greenland runoff in model experiments: relevance of mesoscale dynamics and atmospheric coupling |
title_full_unstemmed |
On the ocean's response to enhanced Greenland runoff in model experiments: relevance of mesoscale dynamics and atmospheric coupling |
title_sort |
on the ocean's response to enhanced greenland runoff in model experiments: relevance of mesoscale dynamics and atmospheric coupling |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/os-19-141-2023 https://noa.gwlb.de/receive/cop_mods_00065092 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00063713/os-19-141-2023.pdf https://os.copernicus.org/articles/19/141/2023/os-19-141-2023.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet North Atlantic |
genre_facet |
Greenland Ice Sheet North Atlantic |
op_relation |
Ocean Science -- http://www.bibliothek.uni-regensburg.de/ezeit/?2183769 -- http://www.copernicus.org/EGU/os/os.html -- 1812-0792 https://doi.org/10.5194/os-19-141-2023 https://noa.gwlb.de/receive/cop_mods_00065092 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00063713/os-19-141-2023.pdf https://os.copernicus.org/articles/19/141/2023/os-19-141-2023.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/os-19-141-2023 |
container_title |
Ocean Science |
container_volume |
19 |
container_issue |
1 |
container_start_page |
141 |
op_container_end_page |
167 |
_version_ |
1766014729014214656 |