The Atlantic inflow across the Greenland-Scotland ridge in global climate models (CMIP5)
Oceanic heat transport from the North Atlantic to the Arctic through the Nordic Seas is a key component of the climate system that has to be modelled accurately in order to predict, for example, future Arctic sea ice changes or European climate. Here we quantify biases in the climatological state an...
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Online Access: | https://doi.org/10.1525/elementa.354 https://doaj.org/article/dad02c3b947e46eaa0e2955bdb5ba939 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:dad02c3b947e46eaa0e2955bdb5ba939 2023-05-15T14:55:50+02:00 The Atlantic inflow across the Greenland-Scotland ridge in global climate models (CMIP5) Céline Heuzé Marius Årthun 2019-05-01 https://doi.org/10.1525/elementa.354 https://doaj.org/article/dad02c3b947e46eaa0e2955bdb5ba939 en eng BioOne 2325-1026 doi:10.1525/elementa.354 https://doaj.org/article/dad02c3b947e46eaa0e2955bdb5ba939 undefined Elementa: Science of the Anthropocene, Vol 7, Iss 1 (2019) Oceanic heat transport Nordic Seas CMIP5 models Climate models envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2019 fttriple https://doi.org/10.1525/elementa.354 2023-01-22T19:28:18Z Oceanic heat transport from the North Atlantic to the Arctic through the Nordic Seas is a key component of the climate system that has to be modelled accurately in order to predict, for example, future Arctic sea ice changes or European climate. Here we quantify biases in the climatological state and dynamics of the transport of oceanic heat into the Nordic Seas across the Greenland-Scotland ridge in 23 state-of-the-art global climate models that participated in the Climate Model Intercomparison Project phase 5. The mean poleward heat transport, its seasonal cycle and interannual variability are inconsistently represented across these models, with a vast majority underestimating them and a few models greatly overestimating them. The main predictor for these biases is the resolution of the model via its representation of the Greenland-Scotland ridge bathymetry: the higher the resolution, the larger the heat transport through the section. The second predictor is the large-scale ocean circulation, which is also connected to the bathymetry: models with the largest heat transport import water from the European slope current into all three straits of the Greenland-Scotland ridge, whereas those with a weak transport import water from the Labrador Sea. The third predictor is the spatial pattern of their main atmospheric modes of variability (North Atlantic Oscillation, East Atlantic and Scandinavian patterns), where the models with a weak inflow have their atmospheric low-pressure centre shifted south towards the central Atlantic. We argue that the key to a better representation of the large-scale oceanic heat transport from the North Atlantic to the Arctic in global models resides not only in higher resolution, but also in a better bathymetry and representation of the complex ocean-ice-atmosphere interactions. Article in Journal/Newspaper Arctic Greenland Greenland-Scotland Ridge Labrador Sea Nordic Seas North Atlantic North Atlantic oscillation Sea ice Unknown Arctic Greenland Elementa: Science of the Anthropocene 7 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
Oceanic heat transport Nordic Seas CMIP5 models Climate models envir geo |
spellingShingle |
Oceanic heat transport Nordic Seas CMIP5 models Climate models envir geo Céline Heuzé Marius Årthun The Atlantic inflow across the Greenland-Scotland ridge in global climate models (CMIP5) |
topic_facet |
Oceanic heat transport Nordic Seas CMIP5 models Climate models envir geo |
description |
Oceanic heat transport from the North Atlantic to the Arctic through the Nordic Seas is a key component of the climate system that has to be modelled accurately in order to predict, for example, future Arctic sea ice changes or European climate. Here we quantify biases in the climatological state and dynamics of the transport of oceanic heat into the Nordic Seas across the Greenland-Scotland ridge in 23 state-of-the-art global climate models that participated in the Climate Model Intercomparison Project phase 5. The mean poleward heat transport, its seasonal cycle and interannual variability are inconsistently represented across these models, with a vast majority underestimating them and a few models greatly overestimating them. The main predictor for these biases is the resolution of the model via its representation of the Greenland-Scotland ridge bathymetry: the higher the resolution, the larger the heat transport through the section. The second predictor is the large-scale ocean circulation, which is also connected to the bathymetry: models with the largest heat transport import water from the European slope current into all three straits of the Greenland-Scotland ridge, whereas those with a weak transport import water from the Labrador Sea. The third predictor is the spatial pattern of their main atmospheric modes of variability (North Atlantic Oscillation, East Atlantic and Scandinavian patterns), where the models with a weak inflow have their atmospheric low-pressure centre shifted south towards the central Atlantic. We argue that the key to a better representation of the large-scale oceanic heat transport from the North Atlantic to the Arctic in global models resides not only in higher resolution, but also in a better bathymetry and representation of the complex ocean-ice-atmosphere interactions. |
format |
Article in Journal/Newspaper |
author |
Céline Heuzé Marius Årthun |
author_facet |
Céline Heuzé Marius Årthun |
author_sort |
Céline Heuzé |
title |
The Atlantic inflow across the Greenland-Scotland ridge in global climate models (CMIP5) |
title_short |
The Atlantic inflow across the Greenland-Scotland ridge in global climate models (CMIP5) |
title_full |
The Atlantic inflow across the Greenland-Scotland ridge in global climate models (CMIP5) |
title_fullStr |
The Atlantic inflow across the Greenland-Scotland ridge in global climate models (CMIP5) |
title_full_unstemmed |
The Atlantic inflow across the Greenland-Scotland ridge in global climate models (CMIP5) |
title_sort |
atlantic inflow across the greenland-scotland ridge in global climate models (cmip5) |
publisher |
BioOne |
publishDate |
2019 |
url |
https://doi.org/10.1525/elementa.354 https://doaj.org/article/dad02c3b947e46eaa0e2955bdb5ba939 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland Greenland-Scotland Ridge Labrador Sea Nordic Seas North Atlantic North Atlantic oscillation Sea ice |
genre_facet |
Arctic Greenland Greenland-Scotland Ridge Labrador Sea Nordic Seas North Atlantic North Atlantic oscillation Sea ice |
op_source |
Elementa: Science of the Anthropocene, Vol 7, Iss 1 (2019) |
op_relation |
2325-1026 doi:10.1525/elementa.354 https://doaj.org/article/dad02c3b947e46eaa0e2955bdb5ba939 |
op_rights |
undefined |
op_doi |
https://doi.org/10.1525/elementa.354 |
container_title |
Elementa: Science of the Anthropocene |
container_volume |
7 |
_version_ |
1766327849529114624 |