A New Combined Detection Algorithm for Blocking and Subtropical Ridges
© 2021 American Meteorological Society. FP. M. Sousa and R. M. Trigo acknowledge financial support from FCT-UIDB/50019/2020-IDL. P. M. Sousa was supported through the following FCT project: HOLMODRIVE-North Atlantic Atmospheric Patterns Influence on Western Iberia Climate: From the Late Glacial to t...
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ftunivcmadrid:oai:docta.ucm.es:20.500.14352/4951 2024-09-15T18:24:14+00:00 A New Combined Detection Algorithm for Blocking and Subtropical Ridges Sousa, Pedro M. Barriopedro Cepero, David García Herrera, Ricardo Francisco Woollings, Tim Trigo, Ricardo M. 2021-09 application/pdf https://hdl.handle.net/20.500.14352/4951 https://doi.org/10.1175/JCLI-D-20-0658.1 eng eng American Meteorological Society ERA4CS (690462) PALEOSTRAT (CGL2015-69699-R); JEDiS (RTI2018-096402-BI00) FCT-UIDB/50019/2020-IDL PTDC/CTA-GEO/29029/2017 https://hdl.handle.net/20.500.14352/4951 0894-8755 doi:10.1175/JCLI-D-20-0658.1 open access 52 Southern annular mode Rossby-wave breaking Atmospheric blocking Hemisphere Climate Variability Trends Impact Amplification Circulation Astrofísica journal article 2021 ftunivcmadrid https://doi.org/20.500.14352/495110.1175/JCLI-D-20-0658.1 2024-08-29T23:43:41Z © 2021 American Meteorological Society. FP. M. Sousa and R. M. Trigo acknowledge financial support from FCT-UIDB/50019/2020-IDL. P. M. Sousa was supported through the following FCT project: HOLMODRIVE-North Atlantic Atmospheric Patterns Influence on Western Iberia Climate: From the Late Glacial to the Present (PTDC/CTA-GEO/29029/2017). D. Barriopedro and R. García-Herrera were supported by the Spanish government through the PALEOSTRAT (CGL2015-69699-R) and JEDiS (RTI2018-096402-BI00) projects. R. M. Trigo was supported by project INDECIS, which is part of ERA4CS, an ERA-NET initiated by JPI Climate, with co-funding by the European Union (Grant 690462). We are grateful to three anonymous reviewers, who made very constructive comments and helped improve the manuscript. Blocks are high-impact atmospheric systems of the mid-/high latitudes and have been widely addressed in meteorological and climatological studies. However, the diversity of blocking definitions makes comparison across studies not straightforward. Here, we propose a conceptual model for the life cycle of high pressure systems that recognizes the multifaceted and transient characteristics of these events. A detection scheme identifies and classifies daily structures, discriminating between subtropical ridges and different types of well-established blocking patterns (omega and dipole-like Rex). This is complemented by a spatiotemporal tracking algorithm, which accounts for transitions between patterns, providing a global catalog of events for 1950-2020. Criteria rely on simple metrics retrieved from one single-level field, and allow implementation in different datasets and climatic realms. Using reanalysis data, we provide illustrative examples, the first global and seasonal climatological assessment of the diversity of high pressure events, their associated impacts, and recent frequency changes. Results reveal that ridge and blocking events affect widespread regions from the subtropics to high latitudes. We find remarkably distinct regional impacts ... Article in Journal/Newspaper North Atlantic Docta Complutense (Universidad Complutense de Madrid - UCM) Journal of Climate 1 64 |
institution |
Open Polar |
collection |
Docta Complutense (Universidad Complutense de Madrid - UCM) |
op_collection_id |
ftunivcmadrid |
language |
English |
topic |
52 Southern annular mode Rossby-wave breaking Atmospheric blocking Hemisphere Climate Variability Trends Impact Amplification Circulation Astrofísica |
spellingShingle |
52 Southern annular mode Rossby-wave breaking Atmospheric blocking Hemisphere Climate Variability Trends Impact Amplification Circulation Astrofísica Sousa, Pedro M. Barriopedro Cepero, David García Herrera, Ricardo Francisco Woollings, Tim Trigo, Ricardo M. A New Combined Detection Algorithm for Blocking and Subtropical Ridges |
topic_facet |
52 Southern annular mode Rossby-wave breaking Atmospheric blocking Hemisphere Climate Variability Trends Impact Amplification Circulation Astrofísica |
description |
© 2021 American Meteorological Society. FP. M. Sousa and R. M. Trigo acknowledge financial support from FCT-UIDB/50019/2020-IDL. P. M. Sousa was supported through the following FCT project: HOLMODRIVE-North Atlantic Atmospheric Patterns Influence on Western Iberia Climate: From the Late Glacial to the Present (PTDC/CTA-GEO/29029/2017). D. Barriopedro and R. García-Herrera were supported by the Spanish government through the PALEOSTRAT (CGL2015-69699-R) and JEDiS (RTI2018-096402-BI00) projects. R. M. Trigo was supported by project INDECIS, which is part of ERA4CS, an ERA-NET initiated by JPI Climate, with co-funding by the European Union (Grant 690462). We are grateful to three anonymous reviewers, who made very constructive comments and helped improve the manuscript. Blocks are high-impact atmospheric systems of the mid-/high latitudes and have been widely addressed in meteorological and climatological studies. However, the diversity of blocking definitions makes comparison across studies not straightforward. Here, we propose a conceptual model for the life cycle of high pressure systems that recognizes the multifaceted and transient characteristics of these events. A detection scheme identifies and classifies daily structures, discriminating between subtropical ridges and different types of well-established blocking patterns (omega and dipole-like Rex). This is complemented by a spatiotemporal tracking algorithm, which accounts for transitions between patterns, providing a global catalog of events for 1950-2020. Criteria rely on simple metrics retrieved from one single-level field, and allow implementation in different datasets and climatic realms. Using reanalysis data, we provide illustrative examples, the first global and seasonal climatological assessment of the diversity of high pressure events, their associated impacts, and recent frequency changes. Results reveal that ridge and blocking events affect widespread regions from the subtropics to high latitudes. We find remarkably distinct regional impacts ... |
format |
Article in Journal/Newspaper |
author |
Sousa, Pedro M. Barriopedro Cepero, David García Herrera, Ricardo Francisco Woollings, Tim Trigo, Ricardo M. |
author_facet |
Sousa, Pedro M. Barriopedro Cepero, David García Herrera, Ricardo Francisco Woollings, Tim Trigo, Ricardo M. |
author_sort |
Sousa, Pedro M. |
title |
A New Combined Detection Algorithm for Blocking and Subtropical Ridges |
title_short |
A New Combined Detection Algorithm for Blocking and Subtropical Ridges |
title_full |
A New Combined Detection Algorithm for Blocking and Subtropical Ridges |
title_fullStr |
A New Combined Detection Algorithm for Blocking and Subtropical Ridges |
title_full_unstemmed |
A New Combined Detection Algorithm for Blocking and Subtropical Ridges |
title_sort |
new combined detection algorithm for blocking and subtropical ridges |
publisher |
American Meteorological Society |
publishDate |
2021 |
url |
https://hdl.handle.net/20.500.14352/4951 https://doi.org/10.1175/JCLI-D-20-0658.1 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
ERA4CS (690462) PALEOSTRAT (CGL2015-69699-R); JEDiS (RTI2018-096402-BI00) FCT-UIDB/50019/2020-IDL PTDC/CTA-GEO/29029/2017 https://hdl.handle.net/20.500.14352/4951 0894-8755 doi:10.1175/JCLI-D-20-0658.1 |
op_rights |
open access |
op_doi |
https://doi.org/20.500.14352/495110.1175/JCLI-D-20-0658.1 |
container_title |
Journal of Climate |
container_start_page |
1 |
op_container_end_page |
64 |
_version_ |
1810464555809112064 |