Deep mixed ocean volume in the Labrador Sea in highresMIP models
Simulations from seven global coupled climate models performed at high and standard resolution as part of the high resolution model intercomparison project (HighResMIP) are analyzed to study deep ocean mixing in the Labrador Sea and the impact of increased horizontal resolution. The representation o...
Published in: | Climate Dynamics |
---|---|
Main Authors: | , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2021
|
Subjects: | |
Online Access: | http://nora.nerc.ac.uk/id/eprint/530725/ https://nora.nerc.ac.uk/id/eprint/530725/7/Koenigk2021_Article_DeepMixedOceanVolumeInTheLabra.pdf https://doi.org/10.1007/s00382-021-05785-x |
id |
ftnerc:oai:nora.nerc.ac.uk:530725 |
---|---|
record_format |
openpolar |
spelling |
ftnerc:oai:nora.nerc.ac.uk:530725 2023-05-15T17:05:55+02:00 Deep mixed ocean volume in the Labrador Sea in highresMIP models Koenigk, Torben Fuentes-Franco, Ramon Meccia, Virna L. Gutjahr, Oliver Jackson, Laura C. New, Adrian Ortega, Pablo Roberts, Christopher D. Roberts, Malcolm J. Arsouze, Thomas Iovino, Doroteaciro Moine, Marie-Pierre Sein, Dmitry V. 2021-05-14 text http://nora.nerc.ac.uk/id/eprint/530725/ https://nora.nerc.ac.uk/id/eprint/530725/7/Koenigk2021_Article_DeepMixedOceanVolumeInTheLabra.pdf https://doi.org/10.1007/s00382-021-05785-x en eng https://nora.nerc.ac.uk/id/eprint/530725/7/Koenigk2021_Article_DeepMixedOceanVolumeInTheLabra.pdf Koenigk, Torben; Fuentes-Franco, Ramon; Meccia, Virna L.; Gutjahr, Oliver; Jackson, Laura C.; New, Adrian orcid:0000-0002-3159-8872 Ortega, Pablo; Roberts, Christopher D.; Roberts, Malcolm J.; Arsouze, Thomas; Iovino, Doroteaciro; Moine, Marie-Pierre; Sein, Dmitry V. 2021 Deep mixed ocean volume in the Labrador Sea in highresMIP models. Climate Dynamics. https://doi.org/10.1007/s00382-021-05785-x <https://doi.org/10.1007/s00382-021-05785-x> cc_by_4 CC-BY Publication - Article PeerReviewed 2021 ftnerc https://doi.org/10.1007/s00382-021-05785-x 2023-02-04T19:52:20Z Simulations from seven global coupled climate models performed at high and standard resolution as part of the high resolution model intercomparison project (HighResMIP) are analyzed to study deep ocean mixing in the Labrador Sea and the impact of increased horizontal resolution. The representation of convection varies strongly among models. Compared to observations from ARGO-foats and the EN4 data set, most models substantially overestimate deep convection in the Labrador Sea. In four out of fve models, all four using the NEMO-ocean model, increasing the ocean resolution from 1° to 1/4° leads to increased deep mixing in the Labrador Sea. Increasing the atmospheric resolution has a smaller efect than increasing the ocean resolution. Simulated convection in the Labrador Sea is mainly governed by the release of heat from the ocean to the atmosphere and by the vertical stratifcation of the water masses in the Labrador Sea in late autumn. Models with stronger sub-polar gyre circulation have generally higher surface salinity in the Labrador Sea and a deeper convection. While the high-resolution models show more realistic ocean stratifcation in the Labrador Sea than the standard resolution models, they generally overestimate the convection. The results indicate that the representation of sub-grid scale mixing processes might be imperfect in the models and contribute to the biases in deep convection. Since in more than half of the models, the Labrador Sea convection is important for the Atlantic Meridional Overturning Circulation (AMOC), this raises questions about the future behavior of the AMOC in the models. Article in Journal/Newspaper Labrador Sea Natural Environment Research Council: NERC Open Research Archive Climate Dynamics 57 7-8 1895 1918 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Simulations from seven global coupled climate models performed at high and standard resolution as part of the high resolution model intercomparison project (HighResMIP) are analyzed to study deep ocean mixing in the Labrador Sea and the impact of increased horizontal resolution. The representation of convection varies strongly among models. Compared to observations from ARGO-foats and the EN4 data set, most models substantially overestimate deep convection in the Labrador Sea. In four out of fve models, all four using the NEMO-ocean model, increasing the ocean resolution from 1° to 1/4° leads to increased deep mixing in the Labrador Sea. Increasing the atmospheric resolution has a smaller efect than increasing the ocean resolution. Simulated convection in the Labrador Sea is mainly governed by the release of heat from the ocean to the atmosphere and by the vertical stratifcation of the water masses in the Labrador Sea in late autumn. Models with stronger sub-polar gyre circulation have generally higher surface salinity in the Labrador Sea and a deeper convection. While the high-resolution models show more realistic ocean stratifcation in the Labrador Sea than the standard resolution models, they generally overestimate the convection. The results indicate that the representation of sub-grid scale mixing processes might be imperfect in the models and contribute to the biases in deep convection. Since in more than half of the models, the Labrador Sea convection is important for the Atlantic Meridional Overturning Circulation (AMOC), this raises questions about the future behavior of the AMOC in the models. |
format |
Article in Journal/Newspaper |
author |
Koenigk, Torben Fuentes-Franco, Ramon Meccia, Virna L. Gutjahr, Oliver Jackson, Laura C. New, Adrian Ortega, Pablo Roberts, Christopher D. Roberts, Malcolm J. Arsouze, Thomas Iovino, Doroteaciro Moine, Marie-Pierre Sein, Dmitry V. |
spellingShingle |
Koenigk, Torben Fuentes-Franco, Ramon Meccia, Virna L. Gutjahr, Oliver Jackson, Laura C. New, Adrian Ortega, Pablo Roberts, Christopher D. Roberts, Malcolm J. Arsouze, Thomas Iovino, Doroteaciro Moine, Marie-Pierre Sein, Dmitry V. Deep mixed ocean volume in the Labrador Sea in highresMIP models |
author_facet |
Koenigk, Torben Fuentes-Franco, Ramon Meccia, Virna L. Gutjahr, Oliver Jackson, Laura C. New, Adrian Ortega, Pablo Roberts, Christopher D. Roberts, Malcolm J. Arsouze, Thomas Iovino, Doroteaciro Moine, Marie-Pierre Sein, Dmitry V. |
author_sort |
Koenigk, Torben |
title |
Deep mixed ocean volume in the Labrador Sea in highresMIP models |
title_short |
Deep mixed ocean volume in the Labrador Sea in highresMIP models |
title_full |
Deep mixed ocean volume in the Labrador Sea in highresMIP models |
title_fullStr |
Deep mixed ocean volume in the Labrador Sea in highresMIP models |
title_full_unstemmed |
Deep mixed ocean volume in the Labrador Sea in highresMIP models |
title_sort |
deep mixed ocean volume in the labrador sea in highresmip models |
publishDate |
2021 |
url |
http://nora.nerc.ac.uk/id/eprint/530725/ https://nora.nerc.ac.uk/id/eprint/530725/7/Koenigk2021_Article_DeepMixedOceanVolumeInTheLabra.pdf https://doi.org/10.1007/s00382-021-05785-x |
genre |
Labrador Sea |
genre_facet |
Labrador Sea |
op_relation |
https://nora.nerc.ac.uk/id/eprint/530725/7/Koenigk2021_Article_DeepMixedOceanVolumeInTheLabra.pdf Koenigk, Torben; Fuentes-Franco, Ramon; Meccia, Virna L.; Gutjahr, Oliver; Jackson, Laura C.; New, Adrian orcid:0000-0002-3159-8872 Ortega, Pablo; Roberts, Christopher D.; Roberts, Malcolm J.; Arsouze, Thomas; Iovino, Doroteaciro; Moine, Marie-Pierre; Sein, Dmitry V. 2021 Deep mixed ocean volume in the Labrador Sea in highresMIP models. Climate Dynamics. https://doi.org/10.1007/s00382-021-05785-x <https://doi.org/10.1007/s00382-021-05785-x> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1007/s00382-021-05785-x |
container_title |
Climate Dynamics |
container_volume |
57 |
container_issue |
7-8 |
container_start_page |
1895 |
op_container_end_page |
1918 |
_version_ |
1766060789884518400 |