Observed subdecadal variations of European summer temperatures
We identify subdecadal variations in European summer temperatures in coupled and uncoupled century-long reanalyses. Spectral analyses reveal significant peaks at 5–10 years in the midtwentieth century. The subdecadal variations show substantial amplitudes of ~1–1.5 °C, associated with extremely warm...
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ftpubman:oai:pure.mpg.de:item_3174090 2023-08-27T04:10:43+02:00 Observed subdecadal variations of European summer temperatures Müller, W. Borchert, L. Ghosh, R. 2020-01-16 application/x-gtar application/pdf http://hdl.handle.net/21.11116/0000-0004-F5E2-8 http://hdl.handle.net/21.11116/0000-0005-5E06-C http://hdl.handle.net/21.11116/0000-0005-9CAD-9 eng eng info:eu-repo/grantAgreement/EC/H2020/776613 info:eu-repo/semantics/altIdentifier/doi/10.1029/2019GL086043 http://hdl.handle.net/21.11116/0000-0004-F5E2-8 http://hdl.handle.net/21.11116/0000-0005-5E06-C http://hdl.handle.net/21.11116/0000-0005-9CAD-9 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Geophysical Research Letters info:eu-repo/semantics/article 2020 ftpubman https://doi.org/10.1029/2019GL086043 2023-08-02T01:50:13Z We identify subdecadal variations in European summer temperatures in coupled and uncoupled century-long reanalyses. Spectral analyses reveal significant peaks at 5–10 years in the midtwentieth century. The subdecadal variations show substantial amplitudes of ~1–1.5 °C, associated with extremely warm summers during their positive phases. We use forced ocean model experiments and show that the European summer temperature variations are associated with the subdecadal coupled North Atlantic climate system. A positive winter NAO-like forcing is associated with changes in the ocean circulation and mass and heat convergence occurring 1–2 years prior to European summer temperature rise. Ocean heat content and sea surface temperature increase in the subtropical North Atlantic. The atmospheric response is barotropic and induces wave activity fluxes toward the European continent, modulation of the jet positions, and blocking frequency. The atmospheric response establishes a pathway connecting the subdecadal coupled North Atlantic climate system to European summer temperature. © 2019. The Authors. Article in Journal/Newspaper North Atlantic Max Planck Society: MPG.PuRe Geophysical Research Letters 47 1 |
institution |
Open Polar |
collection |
Max Planck Society: MPG.PuRe |
op_collection_id |
ftpubman |
language |
English |
description |
We identify subdecadal variations in European summer temperatures in coupled and uncoupled century-long reanalyses. Spectral analyses reveal significant peaks at 5–10 years in the midtwentieth century. The subdecadal variations show substantial amplitudes of ~1–1.5 °C, associated with extremely warm summers during their positive phases. We use forced ocean model experiments and show that the European summer temperature variations are associated with the subdecadal coupled North Atlantic climate system. A positive winter NAO-like forcing is associated with changes in the ocean circulation and mass and heat convergence occurring 1–2 years prior to European summer temperature rise. Ocean heat content and sea surface temperature increase in the subtropical North Atlantic. The atmospheric response is barotropic and induces wave activity fluxes toward the European continent, modulation of the jet positions, and blocking frequency. The atmospheric response establishes a pathway connecting the subdecadal coupled North Atlantic climate system to European summer temperature. © 2019. The Authors. |
format |
Article in Journal/Newspaper |
author |
Müller, W. Borchert, L. Ghosh, R. |
spellingShingle |
Müller, W. Borchert, L. Ghosh, R. Observed subdecadal variations of European summer temperatures |
author_facet |
Müller, W. Borchert, L. Ghosh, R. |
author_sort |
Müller, W. |
title |
Observed subdecadal variations of European summer temperatures |
title_short |
Observed subdecadal variations of European summer temperatures |
title_full |
Observed subdecadal variations of European summer temperatures |
title_fullStr |
Observed subdecadal variations of European summer temperatures |
title_full_unstemmed |
Observed subdecadal variations of European summer temperatures |
title_sort |
observed subdecadal variations of european summer temperatures |
publishDate |
2020 |
url |
http://hdl.handle.net/21.11116/0000-0004-F5E2-8 http://hdl.handle.net/21.11116/0000-0005-5E06-C http://hdl.handle.net/21.11116/0000-0005-9CAD-9 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Geophysical Research Letters |
op_relation |
info:eu-repo/grantAgreement/EC/H2020/776613 info:eu-repo/semantics/altIdentifier/doi/10.1029/2019GL086043 http://hdl.handle.net/21.11116/0000-0004-F5E2-8 http://hdl.handle.net/21.11116/0000-0005-5E06-C http://hdl.handle.net/21.11116/0000-0005-9CAD-9 |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1029/2019GL086043 |
container_title |
Geophysical Research Letters |
container_volume |
47 |
container_issue |
1 |
_version_ |
1775353005011369984 |