Decadal variations of blocking and storm tracks in centennial reanalyses
Extreme weather events in the mid-latitudes are often associated with weather systems, such as extratropical cyclones or blocks. However little is known about the decadal variation in the frequency of blocks and the activity of storm tracks and their relation to the two most important low-frequency...
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ftdatacite:10.3929/ethz-b-000336642 2023-05-15T17:35:01+02:00 Decadal variations of blocking and storm tracks in centennial reanalyses Rohrer, Marco Brönnimann, Stefan Martius, Olivia Raible, Christoph C. Wild, Martin 2019 application/pdf https://dx.doi.org/10.3929/ethz-b-000336642 http://hdl.handle.net/20.500.11850/336642 en eng ETH Zurich info:eu-repo/semantics/openAccess Creative Commons Attribution Non Commercial 4.0 International https://creativecommons.org/licenses/by-nc/4.0/legalcode cc-by-nc-4.0 CC-BY-NC centennial reanalyses blocks cyclones AMO PDO circulation types decadal variability Text article-journal Journal Article ScholarlyArticle 2019 ftdatacite https://doi.org/10.3929/ethz-b-000336642 2021-11-05T12:55:41Z Extreme weather events in the mid-latitudes are often associated with weather systems, such as extratropical cyclones or blocks. However little is known about the decadal variation in the frequency of blocks and the activity of storm tracks and their relation to the two most important low-frequency oceanic modes of variability, the Atlantic multidecadal oscillation (AMO) and the Pacific decadal oscillation (PDO). To address this question, first the representation of blocks, storm tracks and Alpine circulation types is assessed in recently released centennial reanalyses during the 20th century. While interannual variability is represented similarly in all centennial reanalyses, the trends in particular for storm track activity before 1950 differ substantially between the NOAA 20th century reanalyses (20CR and 20CRv2c) and ECMWF centennial reanalyses (ERA-20C and CERA-20C). Therefore, the analysis of the connection between the AMO and PDO and the mid-latitudinal circulation is restricted to the period 1950–2010. All centennial reanalyses agree on the anomaly patterns associated with the different AMO/PDO phases. We find no significant connections except a southward (northward) shift of the storm track over the North Pacific as well as the North Atlantic during the positive (negative) PDO phase. The ERA-20CM atmosphere-only model ensemble captures this relationship, indicating that the ocean forces the atmosphere in the North Pacific. For studies investigating periods earlier than 1950, we recommend using several reanalysis products to ensure the robustness of results. : Tellus A: Dynamic Meteorology and Oceanography, 71 (1) : ISSN:0280-6495 : ISSN:1600-0870 Text North Atlantic DataCite Metadata Store (German National Library of Science and Technology) Pacific |
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Open Polar |
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DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
centennial reanalyses blocks cyclones AMO PDO circulation types decadal variability |
spellingShingle |
centennial reanalyses blocks cyclones AMO PDO circulation types decadal variability Rohrer, Marco Brönnimann, Stefan Martius, Olivia Raible, Christoph C. Wild, Martin Decadal variations of blocking and storm tracks in centennial reanalyses |
topic_facet |
centennial reanalyses blocks cyclones AMO PDO circulation types decadal variability |
description |
Extreme weather events in the mid-latitudes are often associated with weather systems, such as extratropical cyclones or blocks. However little is known about the decadal variation in the frequency of blocks and the activity of storm tracks and their relation to the two most important low-frequency oceanic modes of variability, the Atlantic multidecadal oscillation (AMO) and the Pacific decadal oscillation (PDO). To address this question, first the representation of blocks, storm tracks and Alpine circulation types is assessed in recently released centennial reanalyses during the 20th century. While interannual variability is represented similarly in all centennial reanalyses, the trends in particular for storm track activity before 1950 differ substantially between the NOAA 20th century reanalyses (20CR and 20CRv2c) and ECMWF centennial reanalyses (ERA-20C and CERA-20C). Therefore, the analysis of the connection between the AMO and PDO and the mid-latitudinal circulation is restricted to the period 1950–2010. All centennial reanalyses agree on the anomaly patterns associated with the different AMO/PDO phases. We find no significant connections except a southward (northward) shift of the storm track over the North Pacific as well as the North Atlantic during the positive (negative) PDO phase. The ERA-20CM atmosphere-only model ensemble captures this relationship, indicating that the ocean forces the atmosphere in the North Pacific. For studies investigating periods earlier than 1950, we recommend using several reanalysis products to ensure the robustness of results. : Tellus A: Dynamic Meteorology and Oceanography, 71 (1) : ISSN:0280-6495 : ISSN:1600-0870 |
format |
Text |
author |
Rohrer, Marco Brönnimann, Stefan Martius, Olivia Raible, Christoph C. Wild, Martin |
author_facet |
Rohrer, Marco Brönnimann, Stefan Martius, Olivia Raible, Christoph C. Wild, Martin |
author_sort |
Rohrer, Marco |
title |
Decadal variations of blocking and storm tracks in centennial reanalyses |
title_short |
Decadal variations of blocking and storm tracks in centennial reanalyses |
title_full |
Decadal variations of blocking and storm tracks in centennial reanalyses |
title_fullStr |
Decadal variations of blocking and storm tracks in centennial reanalyses |
title_full_unstemmed |
Decadal variations of blocking and storm tracks in centennial reanalyses |
title_sort |
decadal variations of blocking and storm tracks in centennial reanalyses |
publisher |
ETH Zurich |
publishDate |
2019 |
url |
https://dx.doi.org/10.3929/ethz-b-000336642 http://hdl.handle.net/20.500.11850/336642 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution Non Commercial 4.0 International https://creativecommons.org/licenses/by-nc/4.0/legalcode cc-by-nc-4.0 |
op_rightsnorm |
CC-BY-NC |
op_doi |
https://doi.org/10.3929/ethz-b-000336642 |
_version_ |
1766134048299679744 |