Deep mixed ocean volume in the Labrador Sea in HighResMIP models
Abstract 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 represe...
Published in: | Climate Dynamics |
---|---|
Main Authors: | , , , , , , , , , , , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Springer Science and Business Media LLC
2021
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1007/s00382-021-05785-x https://link.springer.com/content/pdf/10.1007/s00382-021-05785-x.pdf https://link.springer.com/article/10.1007/s00382-021-05785-x/fulltext.html |
id |
crspringernat:10.1007/s00382-021-05785-x |
---|---|
record_format |
openpolar |
spelling |
crspringernat:10.1007/s00382-021-05785-x 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 L. Ortega, Pablo Roberts, Christopher D. Roberts, Malcolm J. Arsouze, Thomas Iovino, Doroteaciro Moine, Marie-Pierre Sein, Dmitry V. Horizon 2020 2021 http://dx.doi.org/10.1007/s00382-021-05785-x https://link.springer.com/content/pdf/10.1007/s00382-021-05785-x.pdf https://link.springer.com/article/10.1007/s00382-021-05785-x/fulltext.html en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Climate Dynamics volume 57, issue 7-8, page 1895-1918 ISSN 0930-7575 1432-0894 Atmospheric Science journal-article 2021 crspringernat https://doi.org/10.1007/s00382-021-05785-x 2022-01-04T16:04:58Z Abstract 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-floats and the EN4 data set, most models substantially overestimate deep convection in the Labrador Sea. In four out of five 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 effect 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 stratification 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 stratification 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 Springer Nature (via Crossref) Climate Dynamics |
institution |
Open Polar |
collection |
Springer Nature (via Crossref) |
op_collection_id |
crspringernat |
language |
English |
topic |
Atmospheric Science |
spellingShingle |
Atmospheric Science Koenigk, Torben Fuentes-Franco, Ramon Meccia, Virna L. Gutjahr, Oliver Jackson, Laura C. New, Adrian L. 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 |
topic_facet |
Atmospheric Science |
description |
Abstract 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-floats and the EN4 data set, most models substantially overestimate deep convection in the Labrador Sea. In four out of five 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 effect 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 stratification 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 stratification 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. |
author2 |
Horizon 2020 |
format |
Article in Journal/Newspaper |
author |
Koenigk, Torben Fuentes-Franco, Ramon Meccia, Virna L. Gutjahr, Oliver Jackson, Laura C. New, Adrian L. Ortega, Pablo Roberts, Christopher D. Roberts, Malcolm J. Arsouze, Thomas Iovino, Doroteaciro Moine, Marie-Pierre Sein, Dmitry V. |
author_facet |
Koenigk, Torben Fuentes-Franco, Ramon Meccia, Virna L. Gutjahr, Oliver Jackson, Laura C. New, Adrian L. 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 |
publisher |
Springer Science and Business Media LLC |
publishDate |
2021 |
url |
http://dx.doi.org/10.1007/s00382-021-05785-x https://link.springer.com/content/pdf/10.1007/s00382-021-05785-x.pdf https://link.springer.com/article/10.1007/s00382-021-05785-x/fulltext.html |
genre |
Labrador Sea |
genre_facet |
Labrador Sea |
op_source |
Climate Dynamics volume 57, issue 7-8, page 1895-1918 ISSN 0930-7575 1432-0894 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1007/s00382-021-05785-x |
container_title |
Climate Dynamics |
_version_ |
1766060790640541696 |