Synoptic reorganization of atmospheric flow during the Last Glacial Maximum
A coupled global atmosphere–ocean model of intermediate complexity is used to study the influence of glacial boundary conditions on the atmospheric circulation during the Last Glacial Maximum in a systematical manner. A web of atmospheric interactions is disentangled, which involves changes in the m...
Published in: | Journal of Climate |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
AMS (American Meteorological Society)
2005
|
Subjects: | |
Online Access: | https://oceanrep.geomar.de/id/eprint/1026/ https://oceanrep.geomar.de/id/eprint/1026/1/JCLI3403.pdf https://doi.org/10.1175/JCLI3403.1 |
id |
ftoceanrep:oai:oceanrep.geomar.de:1026 |
---|---|
record_format |
openpolar |
spelling |
ftoceanrep:oai:oceanrep.geomar.de:1026 2024-09-15T18:23:09+00:00 Synoptic reorganization of atmospheric flow during the Last Glacial Maximum Justino, Flavio B. Timmermann, Axel Merkel, Ute Sousa, E. P. 2005 text https://oceanrep.geomar.de/id/eprint/1026/ https://oceanrep.geomar.de/id/eprint/1026/1/JCLI3403.pdf https://doi.org/10.1175/JCLI3403.1 en eng AMS (American Meteorological Society) https://oceanrep.geomar.de/id/eprint/1026/1/JCLI3403.pdf Justino, F. B., Timmermann, A., Merkel, U. and Sousa, E. P. (2005) Synoptic reorganization of atmospheric flow during the Last Glacial Maximum. Open Access Journal of Climate, 18 . pp. 2826-2846. DOI 10.1175/JCLI3403.1 <https://doi.org/10.1175/JCLI3403.1>. doi:10.1175/JCLI3403.1 info:eu-repo/semantics/openAccess Article PeerReviewed 2005 ftoceanrep https://doi.org/10.1175/JCLI3403.1 2024-09-04T05:04:40Z A coupled global atmosphere–ocean model of intermediate complexity is used to study the influence of glacial boundary conditions on the atmospheric circulation during the Last Glacial Maximum in a systematical manner. A web of atmospheric interactions is disentangled, which involves changes in the meridional temperature gradient and an associated modulation of the atmospheric baroclinicity. This in turn drives anomalous transient eddy momentum fluxes that feed back onto the zonal mean circulation. Moreover, the modified transient activity (weakened in the North Pacific and strengthened in the North Atlantic) leads to a meridional reorganization of the atmospheric heat transport, thereby feeding back onto the meridional temperature structure. Furthermore, positive barotropic conversion and baroclinic production rates over the Laurentide ice sheets and the far eastern North Pacific have the tendency to decelerate the westerlies, thereby feeding back to the stationary wave changes triggered by orographic forcing. Article in Journal/Newspaper North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Journal of Climate 18 15 2826 2846 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
A coupled global atmosphere–ocean model of intermediate complexity is used to study the influence of glacial boundary conditions on the atmospheric circulation during the Last Glacial Maximum in a systematical manner. A web of atmospheric interactions is disentangled, which involves changes in the meridional temperature gradient and an associated modulation of the atmospheric baroclinicity. This in turn drives anomalous transient eddy momentum fluxes that feed back onto the zonal mean circulation. Moreover, the modified transient activity (weakened in the North Pacific and strengthened in the North Atlantic) leads to a meridional reorganization of the atmospheric heat transport, thereby feeding back onto the meridional temperature structure. Furthermore, positive barotropic conversion and baroclinic production rates over the Laurentide ice sheets and the far eastern North Pacific have the tendency to decelerate the westerlies, thereby feeding back to the stationary wave changes triggered by orographic forcing. |
format |
Article in Journal/Newspaper |
author |
Justino, Flavio B. Timmermann, Axel Merkel, Ute Sousa, E. P. |
spellingShingle |
Justino, Flavio B. Timmermann, Axel Merkel, Ute Sousa, E. P. Synoptic reorganization of atmospheric flow during the Last Glacial Maximum |
author_facet |
Justino, Flavio B. Timmermann, Axel Merkel, Ute Sousa, E. P. |
author_sort |
Justino, Flavio B. |
title |
Synoptic reorganization of atmospheric flow during the Last Glacial Maximum |
title_short |
Synoptic reorganization of atmospheric flow during the Last Glacial Maximum |
title_full |
Synoptic reorganization of atmospheric flow during the Last Glacial Maximum |
title_fullStr |
Synoptic reorganization of atmospheric flow during the Last Glacial Maximum |
title_full_unstemmed |
Synoptic reorganization of atmospheric flow during the Last Glacial Maximum |
title_sort |
synoptic reorganization of atmospheric flow during the last glacial maximum |
publisher |
AMS (American Meteorological Society) |
publishDate |
2005 |
url |
https://oceanrep.geomar.de/id/eprint/1026/ https://oceanrep.geomar.de/id/eprint/1026/1/JCLI3403.pdf https://doi.org/10.1175/JCLI3403.1 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/1026/1/JCLI3403.pdf Justino, F. B., Timmermann, A., Merkel, U. and Sousa, E. P. (2005) Synoptic reorganization of atmospheric flow during the Last Glacial Maximum. Open Access Journal of Climate, 18 . pp. 2826-2846. DOI 10.1175/JCLI3403.1 <https://doi.org/10.1175/JCLI3403.1>. doi:10.1175/JCLI3403.1 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1175/JCLI3403.1 |
container_title |
Journal of Climate |
container_volume |
18 |
container_issue |
15 |
container_start_page |
2826 |
op_container_end_page |
2846 |
_version_ |
1810463286600138752 |