Max Planck Institute Earth System Model (MPI-ESM1.2) for the High-Resolution Model Intercomparison Project (HighResMIP)
As a contribution towards improving the climate mean state of the atmosphere and the ocean in Earth system models (ESMs), we compare several coupled simulations conducted with the Max Planck Institute for Meteorology Earth System Model (MPI-ESM1.2) following the HighResMIP protocol. Our simulations...
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ftcopernicus:oai:publications.copernicus.org:gmd72773 2023-05-15T13:55:28+02:00 Max Planck Institute Earth System Model (MPI-ESM1.2) for the High-Resolution Model Intercomparison Project (HighResMIP) Gutjahr, Oliver Putrasahan, Dian Lohmann, Katja Jungclaus, Johann H. Storch, Jin-Song Brüggemann, Nils Haak, Helmuth Stössel, Achim 2019-07-25 application/pdf https://doi.org/10.5194/gmd-12-3241-2019 https://gmd.copernicus.org/articles/12/3241/2019/ eng eng doi:10.5194/gmd-12-3241-2019 https://gmd.copernicus.org/articles/12/3241/2019/ eISSN: 1991-9603 Text 2019 ftcopernicus https://doi.org/10.5194/gmd-12-3241-2019 2020-07-20T16:22:44Z As a contribution towards improving the climate mean state of the atmosphere and the ocean in Earth system models (ESMs), we compare several coupled simulations conducted with the Max Planck Institute for Meteorology Earth System Model (MPI-ESM1.2) following the HighResMIP protocol. Our simulations allow to analyse the separate effects of increasing the horizontal resolution of the ocean (0.4 to 0.1 ∘ ) and atmosphere (T127 to T255) submodels, and the effects of substituting the Pacanowski and Philander (PP) vertical ocean mixing scheme with the K-profile parameterization (KPP). The results show clearly distinguishable effects from all three factors. The high resolution in the ocean removes biases in the ocean interior and in the atmosphere. This leads to the important conclusion that a high-resolution ocean has a major impact on the mean state of the ocean and the atmosphere. The T255 atmosphere reduces the surface wind stress and improves ocean mixed layer depths in both hemispheres. The reduced wind forcing, in turn, slows the Antarctic Circumpolar Current (ACC), reducing it to observed values. In the North Atlantic, however, the reduced surface wind causes a weakening of the subpolar gyre and thus a slowing down of the Atlantic meridional overturning circulation (AMOC), when the PP scheme is used. The KPP scheme, on the other hand, causes stronger open-ocean convection which spins up the subpolar gyres, ultimately leading to a stronger and stable AMOC, even when coupled to the T255 atmosphere, thus retaining all the positive effects of a higher-resolved atmosphere. Text Antarc* Antarctic North Atlantic Copernicus Publications: E-Journals Antarctic The Antarctic Geoscientific Model Development 12 7 3241 3281 |
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Copernicus Publications: E-Journals |
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ftcopernicus |
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English |
description |
As a contribution towards improving the climate mean state of the atmosphere and the ocean in Earth system models (ESMs), we compare several coupled simulations conducted with the Max Planck Institute for Meteorology Earth System Model (MPI-ESM1.2) following the HighResMIP protocol. Our simulations allow to analyse the separate effects of increasing the horizontal resolution of the ocean (0.4 to 0.1 ∘ ) and atmosphere (T127 to T255) submodels, and the effects of substituting the Pacanowski and Philander (PP) vertical ocean mixing scheme with the K-profile parameterization (KPP). The results show clearly distinguishable effects from all three factors. The high resolution in the ocean removes biases in the ocean interior and in the atmosphere. This leads to the important conclusion that a high-resolution ocean has a major impact on the mean state of the ocean and the atmosphere. The T255 atmosphere reduces the surface wind stress and improves ocean mixed layer depths in both hemispheres. The reduced wind forcing, in turn, slows the Antarctic Circumpolar Current (ACC), reducing it to observed values. In the North Atlantic, however, the reduced surface wind causes a weakening of the subpolar gyre and thus a slowing down of the Atlantic meridional overturning circulation (AMOC), when the PP scheme is used. The KPP scheme, on the other hand, causes stronger open-ocean convection which spins up the subpolar gyres, ultimately leading to a stronger and stable AMOC, even when coupled to the T255 atmosphere, thus retaining all the positive effects of a higher-resolved atmosphere. |
format |
Text |
author |
Gutjahr, Oliver Putrasahan, Dian Lohmann, Katja Jungclaus, Johann H. Storch, Jin-Song Brüggemann, Nils Haak, Helmuth Stössel, Achim |
spellingShingle |
Gutjahr, Oliver Putrasahan, Dian Lohmann, Katja Jungclaus, Johann H. Storch, Jin-Song Brüggemann, Nils Haak, Helmuth Stössel, Achim Max Planck Institute Earth System Model (MPI-ESM1.2) for the High-Resolution Model Intercomparison Project (HighResMIP) |
author_facet |
Gutjahr, Oliver Putrasahan, Dian Lohmann, Katja Jungclaus, Johann H. Storch, Jin-Song Brüggemann, Nils Haak, Helmuth Stössel, Achim |
author_sort |
Gutjahr, Oliver |
title |
Max Planck Institute Earth System Model (MPI-ESM1.2) for the High-Resolution Model Intercomparison Project (HighResMIP) |
title_short |
Max Planck Institute Earth System Model (MPI-ESM1.2) for the High-Resolution Model Intercomparison Project (HighResMIP) |
title_full |
Max Planck Institute Earth System Model (MPI-ESM1.2) for the High-Resolution Model Intercomparison Project (HighResMIP) |
title_fullStr |
Max Planck Institute Earth System Model (MPI-ESM1.2) for the High-Resolution Model Intercomparison Project (HighResMIP) |
title_full_unstemmed |
Max Planck Institute Earth System Model (MPI-ESM1.2) for the High-Resolution Model Intercomparison Project (HighResMIP) |
title_sort |
max planck institute earth system model (mpi-esm1.2) for the high-resolution model intercomparison project (highresmip) |
publishDate |
2019 |
url |
https://doi.org/10.5194/gmd-12-3241-2019 https://gmd.copernicus.org/articles/12/3241/2019/ |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
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Antarc* Antarctic North Atlantic |
genre_facet |
Antarc* Antarctic North Atlantic |
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eISSN: 1991-9603 |
op_relation |
doi:10.5194/gmd-12-3241-2019 https://gmd.copernicus.org/articles/12/3241/2019/ |
op_doi |
https://doi.org/10.5194/gmd-12-3241-2019 |
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Geoscientific Model Development |
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12 |
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3281 |
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