Links between Rossby Wave Breaking and the North Atlantic Oscillation-Arctic Oscillation in Present-Day and Last Glacial Maximum Climate Simulations
International audience Upper-tropospheric Rossby wave-breaking processes are examined in coupled ocean-atmosphere simulations of the Last Glacial Maximum (LGM) and of the modern era. LGM statistics of the Northern Hemisphere in winter, computed from the Paleoclimate Modeling Intercomparison Project...
Published in: | Journal of Climate |
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Main Authors: | , , , , |
Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2010
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Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-01138416 https://hal.archives-ouvertes.fr/hal-01138416/document https://hal.archives-ouvertes.fr/hal-01138416/file/2010JCLI3372.pdf https://doi.org/10.1175/2010jcli3372.1 |
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English |
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[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Riviere, Gwendal Laine, Alexandre Lapeyre, Guillaume Salas-Mélia, David Kageyama, Masa Links between Rossby Wave Breaking and the North Atlantic Oscillation-Arctic Oscillation in Present-Day and Last Glacial Maximum Climate Simulations |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience Upper-tropospheric Rossby wave-breaking processes are examined in coupled ocean-atmosphere simulations of the Last Glacial Maximum (LGM) and of the modern era. LGM statistics of the Northern Hemisphere in winter, computed from the Paleoclimate Modeling Intercomparison Project Phase II (PMIP2) dataset, are compared with those from preindustrial simulations and from the 40-yr ECMWF Re-Analysis (ERA-40). Particular attention is given to the role of wave-breaking events in the North Atlantic Oscillation (NAO) for each simulation. Anticyclonic (AWB) and cyclonic (CWB) wave-breaking events during LGM are shown to be less and more frequent, respectively, than in the preindustrial climate, especially in the Pacific. This is consistent with the slight equatorward shift of the eddy-driven jets in the LGM runs. The most remarkable feature of the simulated LGM climate is that it presents much weaker latitudinal fluctuations of the eddy-driven jets. This is accompanied by less dispersion in the wave-breaking events. A physical interpretation is provided in terms of the fluctuations of the low-level baroclinicity at the entrance of the storm tracks. The NAO in the preindustrial simulations and in ERA-40 is characterized by strong latitudinal fluctuations of the Atlantic eddy-driven jet as well as by significant changes in the nature of the wave breaking. During the positive phase, the eddy-driven jet moves to the north with more AWB events than usual and is well separated from the subtropical African jet. The negative phase exhibits a more equatorward Atlantic jet and more CWB events. In contrast, the LGM NAO is less well marked by the latitudinal vacillation of the Atlantic jet and for some models this property disappears entirely. The LGM NAO corresponds more to acceleration-deceleration or extension-retraction of the Atlantic jet. The hemispheric point of view of the Arctic Oscillation exhibits similar changes. |
author2 |
Groupe d'étude de l'atmosphère météorologique (CNRM-GAME) Institut national des sciences de l'Univers (INSU - CNRS)-Météo France-Centre National de la Recherche Scientifique (CNRS) Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS Paris) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS Paris) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École des Ponts ParisTech (ENPC)-École polytechnique (X)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) Modélisation du climat (CLIM) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) |
format |
Article in Journal/Newspaper |
author |
Riviere, Gwendal Laine, Alexandre Lapeyre, Guillaume Salas-Mélia, David Kageyama, Masa |
author_facet |
Riviere, Gwendal Laine, Alexandre Lapeyre, Guillaume Salas-Mélia, David Kageyama, Masa |
author_sort |
Riviere, Gwendal |
title |
Links between Rossby Wave Breaking and the North Atlantic Oscillation-Arctic Oscillation in Present-Day and Last Glacial Maximum Climate Simulations |
title_short |
Links between Rossby Wave Breaking and the North Atlantic Oscillation-Arctic Oscillation in Present-Day and Last Glacial Maximum Climate Simulations |
title_full |
Links between Rossby Wave Breaking and the North Atlantic Oscillation-Arctic Oscillation in Present-Day and Last Glacial Maximum Climate Simulations |
title_fullStr |
Links between Rossby Wave Breaking and the North Atlantic Oscillation-Arctic Oscillation in Present-Day and Last Glacial Maximum Climate Simulations |
title_full_unstemmed |
Links between Rossby Wave Breaking and the North Atlantic Oscillation-Arctic Oscillation in Present-Day and Last Glacial Maximum Climate Simulations |
title_sort |
links between rossby wave breaking and the north atlantic oscillation-arctic oscillation in present-day and last glacial maximum climate simulations |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal.archives-ouvertes.fr/hal-01138416 https://hal.archives-ouvertes.fr/hal-01138416/document https://hal.archives-ouvertes.fr/hal-01138416/file/2010JCLI3372.pdf https://doi.org/10.1175/2010jcli3372.1 |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic North Atlantic North Atlantic oscillation |
genre_facet |
Arctic North Atlantic North Atlantic oscillation |
op_source |
ISSN: 0894-8755 EISSN: 1520-0442 Journal of Climate https://hal.archives-ouvertes.fr/hal-01138416 Journal of Climate, American Meteorological Society, 2010, 23 (11), pp.2987-3008. ⟨10.1175/2010jcli3372.1⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1175/2010jcli3372.1 hal-01138416 https://hal.archives-ouvertes.fr/hal-01138416 https://hal.archives-ouvertes.fr/hal-01138416/document https://hal.archives-ouvertes.fr/hal-01138416/file/2010JCLI3372.pdf doi:10.1175/2010jcli3372.1 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1175/2010jcli3372.1 |
container_title |
Journal of Climate |
container_volume |
23 |
container_issue |
11 |
container_start_page |
2987 |
op_container_end_page |
3008 |
_version_ |
1766333809657118720 |
spelling |
ftccsdartic:oai:HAL:hal-01138416v1 2023-05-15T15:01:48+02:00 Links between Rossby Wave Breaking and the North Atlantic Oscillation-Arctic Oscillation in Present-Day and Last Glacial Maximum Climate Simulations Riviere, Gwendal Laine, Alexandre Lapeyre, Guillaume Salas-Mélia, David Kageyama, Masa Groupe d'étude de l'atmosphère météorologique (CNRM-GAME) Institut national des sciences de l'Univers (INSU - CNRS)-Météo France-Centre National de la Recherche Scientifique (CNRS) Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS Paris) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS Paris) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École des Ponts ParisTech (ENPC)-École polytechnique (X)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) Modélisation du climat (CLIM) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) 2010 https://hal.archives-ouvertes.fr/hal-01138416 https://hal.archives-ouvertes.fr/hal-01138416/document https://hal.archives-ouvertes.fr/hal-01138416/file/2010JCLI3372.pdf https://doi.org/10.1175/2010jcli3372.1 en eng HAL CCSD American Meteorological Society info:eu-repo/semantics/altIdentifier/doi/10.1175/2010jcli3372.1 hal-01138416 https://hal.archives-ouvertes.fr/hal-01138416 https://hal.archives-ouvertes.fr/hal-01138416/document https://hal.archives-ouvertes.fr/hal-01138416/file/2010JCLI3372.pdf doi:10.1175/2010jcli3372.1 info:eu-repo/semantics/OpenAccess ISSN: 0894-8755 EISSN: 1520-0442 Journal of Climate https://hal.archives-ouvertes.fr/hal-01138416 Journal of Climate, American Meteorological Society, 2010, 23 (11), pp.2987-3008. ⟨10.1175/2010jcli3372.1⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2010 ftccsdartic https://doi.org/10.1175/2010jcli3372.1 2021-12-19T02:56:29Z International audience Upper-tropospheric Rossby wave-breaking processes are examined in coupled ocean-atmosphere simulations of the Last Glacial Maximum (LGM) and of the modern era. LGM statistics of the Northern Hemisphere in winter, computed from the Paleoclimate Modeling Intercomparison Project Phase II (PMIP2) dataset, are compared with those from preindustrial simulations and from the 40-yr ECMWF Re-Analysis (ERA-40). Particular attention is given to the role of wave-breaking events in the North Atlantic Oscillation (NAO) for each simulation. Anticyclonic (AWB) and cyclonic (CWB) wave-breaking events during LGM are shown to be less and more frequent, respectively, than in the preindustrial climate, especially in the Pacific. This is consistent with the slight equatorward shift of the eddy-driven jets in the LGM runs. The most remarkable feature of the simulated LGM climate is that it presents much weaker latitudinal fluctuations of the eddy-driven jets. This is accompanied by less dispersion in the wave-breaking events. A physical interpretation is provided in terms of the fluctuations of the low-level baroclinicity at the entrance of the storm tracks. The NAO in the preindustrial simulations and in ERA-40 is characterized by strong latitudinal fluctuations of the Atlantic eddy-driven jet as well as by significant changes in the nature of the wave breaking. During the positive phase, the eddy-driven jet moves to the north with more AWB events than usual and is well separated from the subtropical African jet. The negative phase exhibits a more equatorward Atlantic jet and more CWB events. In contrast, the LGM NAO is less well marked by the latitudinal vacillation of the Atlantic jet and for some models this property disappears entirely. The LGM NAO corresponds more to acceleration-deceleration or extension-retraction of the Atlantic jet. The hemispheric point of view of the Arctic Oscillation exhibits similar changes. Article in Journal/Newspaper Arctic North Atlantic North Atlantic oscillation Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Arctic Pacific Journal of Climate 23 11 2987 3008 |