Representation of Extratropical Cyclones, Blocking Anticyclones, and Alpine Circulation Types in Multiple Reanalyses and Model Simulations
Atmospheric circulation types, blockings, and cyclones are central features of the extratropical flow and key to understanding the climate system. This study intercompares the representation of these features in 10 reanalyses and in an ensemble of 30 climate model simulations between 1980 and 2005....
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ftdatacite:10.7892/boris.116228 2023-05-15T17:34:43+02:00 Representation of Extratropical Cyclones, Blocking Anticyclones, and Alpine Circulation Types in Multiple Reanalyses and Model Simulations Rohrer, Marco Brönnimann, Stefan Martius, Olivia Raible, Christoph Wild, Martin Compo, Gilbert P. 2018 application/pdf https://dx.doi.org/10.7892/boris.116228 https://boris.unibe.ch/116228/ en eng American Meteorological Society info:eu-repo/semantics/openAccess 530 Physics 550 Earth sciences & geology 910 Geography & travel Text article-journal ScholarlyArticle 2018 ftdatacite https://doi.org/10.7892/boris.116228 2021-11-05T12:55:41Z Atmospheric circulation types, blockings, and cyclones are central features of the extratropical flow and key to understanding the climate system. This study intercompares the representation of these features in 10 reanalyses and in an ensemble of 30 climate model simulations between 1980 and 2005. Both modern, full-input reanalyses and century-long, surface-input reanalyses are examined. Modern full-input reanalyses agree well on key statistics of blockings, cyclones, and circulation types. However, the intensity and depth of cyclones vary among them. Reanalyses with higher horizontal resolution show higher cyclone center densities and more intense cyclones. For blockings, no strict relationship is found between frequency or intensity and horizontal resolution. Full-input reanalyses contain more intense blocking, compared to surface-input reanalyses. Circulation-type classifications over central Europe show that both versions of the Twentieth Century Reanalysis dataset contain more easterlies and fewer westerlies than any other reanalysis, owing to their high pressure bias over northeast Europe. The temporal correlation of annual circulation types over central Europe and blocking frequencies over the North Atlantic–European domain between reanalyses is high (around 0.8). The ensemble simulations capture the main characteristics of midlatitudinal atmospheric circulation. Circulation types of westerlies to northerlies over central Europe are overrepresented. There are too few blockings in the higher latitudes and an excess of cyclones in the midlatitudes. Other characteristics, such as blocking amplitude and cyclone intensity, are realistically represented, making the ensemble simulations a rich dataset to assess changes in climate variability. Text North Atlantic DataCite Metadata Store (German National Library of Science and Technology) |
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DataCite Metadata Store (German National Library of Science and Technology) |
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English |
topic |
530 Physics 550 Earth sciences & geology 910 Geography & travel |
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530 Physics 550 Earth sciences & geology 910 Geography & travel Rohrer, Marco Brönnimann, Stefan Martius, Olivia Raible, Christoph Wild, Martin Compo, Gilbert P. Representation of Extratropical Cyclones, Blocking Anticyclones, and Alpine Circulation Types in Multiple Reanalyses and Model Simulations |
topic_facet |
530 Physics 550 Earth sciences & geology 910 Geography & travel |
description |
Atmospheric circulation types, blockings, and cyclones are central features of the extratropical flow and key to understanding the climate system. This study intercompares the representation of these features in 10 reanalyses and in an ensemble of 30 climate model simulations between 1980 and 2005. Both modern, full-input reanalyses and century-long, surface-input reanalyses are examined. Modern full-input reanalyses agree well on key statistics of blockings, cyclones, and circulation types. However, the intensity and depth of cyclones vary among them. Reanalyses with higher horizontal resolution show higher cyclone center densities and more intense cyclones. For blockings, no strict relationship is found between frequency or intensity and horizontal resolution. Full-input reanalyses contain more intense blocking, compared to surface-input reanalyses. Circulation-type classifications over central Europe show that both versions of the Twentieth Century Reanalysis dataset contain more easterlies and fewer westerlies than any other reanalysis, owing to their high pressure bias over northeast Europe. The temporal correlation of annual circulation types over central Europe and blocking frequencies over the North Atlantic–European domain between reanalyses is high (around 0.8). The ensemble simulations capture the main characteristics of midlatitudinal atmospheric circulation. Circulation types of westerlies to northerlies over central Europe are overrepresented. There are too few blockings in the higher latitudes and an excess of cyclones in the midlatitudes. Other characteristics, such as blocking amplitude and cyclone intensity, are realistically represented, making the ensemble simulations a rich dataset to assess changes in climate variability. |
format |
Text |
author |
Rohrer, Marco Brönnimann, Stefan Martius, Olivia Raible, Christoph Wild, Martin Compo, Gilbert P. |
author_facet |
Rohrer, Marco Brönnimann, Stefan Martius, Olivia Raible, Christoph Wild, Martin Compo, Gilbert P. |
author_sort |
Rohrer, Marco |
title |
Representation of Extratropical Cyclones, Blocking Anticyclones, and Alpine Circulation Types in Multiple Reanalyses and Model Simulations |
title_short |
Representation of Extratropical Cyclones, Blocking Anticyclones, and Alpine Circulation Types in Multiple Reanalyses and Model Simulations |
title_full |
Representation of Extratropical Cyclones, Blocking Anticyclones, and Alpine Circulation Types in Multiple Reanalyses and Model Simulations |
title_fullStr |
Representation of Extratropical Cyclones, Blocking Anticyclones, and Alpine Circulation Types in Multiple Reanalyses and Model Simulations |
title_full_unstemmed |
Representation of Extratropical Cyclones, Blocking Anticyclones, and Alpine Circulation Types in Multiple Reanalyses and Model Simulations |
title_sort |
representation of extratropical cyclones, blocking anticyclones, and alpine circulation types in multiple reanalyses and model simulations |
publisher |
American Meteorological Society |
publishDate |
2018 |
url |
https://dx.doi.org/10.7892/boris.116228 https://boris.unibe.ch/116228/ |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.7892/boris.116228 |
_version_ |
1766133633279590400 |