The southern hemisphere blocking index revisited

Autores
Yuchechen , Adrian E.; Lakkis, Susan Gabriela; Canziani, Pablo O.
Año de publicación
2022
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Fil: Yuchechen , Adrian E. Universidad Tecnológica Nacional. Facultad Regional Buenos Aires. Unidad de Investigación y Desarrollo de las Ingenierías; Argentina
Fil: Yuchechen , Adrian E. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Lakkis, S. Gabriela. Pontificia Universidad Católica Argentina. Facultad de Ingeniería y Ciencias Agrarias; Argentina
Fil: Lakkis, S. Gabriela. Universidad Tecnológica Nacional. Facultad Regional Buenos Aires. Unidad de Investigación y Desarrollo de las Ingenierías; Argentina
Fil: Canziani, Pablo O. Universidad Tecnológica Nacional. Facultad Regional Buenos Aires. Unidad de Investigación y Desarrollo de las Ingenierías; Argentina
Fil: Canziani, Pablo O. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Abstract: An updated climatology for the occurrence of blockings in the Southern Hemisphere (SH) using daily reanalysis data from 1948–2021 is presented. Geopotential height (z) at 500 hPa was the working variable. The blocking index (BI) was defined for every 2.5° of longitude whenever z(35° S)−z(50° S)<0. The results were organized in longitudinal bands of a width of 10° in order to compare them with previous findings. The primary region for the occurrence of blockings was located around the date line, with a secondary region in southern South America (SSA) and its vicinities, with a third-rank region situated in southern Africa and its surroundings. The results were also stratified by the intensity and duration (persistence) of the events, and the annual and seasonal differences were discussed. Additionally, three different areas were defined to study the distribution of the blockings therein, with the Pacific region (110° E–80° W) having the maximum intensities and longest durations. Linear trends were estimated for the annual and the seasonal time series of the BI and for the number of episodes. On an annual basis, more frequent and the strongest events are expected at 180° E and their surroundings in the future. An alternative BI, using radiosonde data, was built for SSA at 58.50° W. The time evolution of this index was in general agreement with the one estimated from the reanalysis data at some longitudes.
Fuente
Atmosphere Vol.13, No.9, 1343, 2022
Materia
HEMISFERIO SUR
BLOQUEO
INDICE DE BLOQUEO
DATOS DE REANALISIS
DATOS DE RADIOSONDA
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
Repositorio Institucional (UCA)
Institución
Pontificia Universidad Católica Argentina
OAI Identificador
oai:ucacris:123456789/15043

id RIUCA_6c63d0de60bff1d21b2c2f453c1c9392
oai_identifier_str oai:ucacris:123456789/15043
network_acronym_str RIUCA
repository_id_str 2585
network_name_str Repositorio Institucional (UCA)
spelling The southern hemisphere blocking index revisitedYuchechen , Adrian E.Lakkis, Susan GabrielaCanziani, Pablo O.HEMISFERIO SURBLOQUEOINDICE DE BLOQUEODATOS DE REANALISISDATOS DE RADIOSONDAFil: Yuchechen , Adrian E. Universidad Tecnológica Nacional. Facultad Regional Buenos Aires. Unidad de Investigación y Desarrollo de las Ingenierías; ArgentinaFil: Yuchechen , Adrian E. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Lakkis, S. Gabriela. Pontificia Universidad Católica Argentina. Facultad de Ingeniería y Ciencias Agrarias; ArgentinaFil: Lakkis, S. Gabriela. Universidad Tecnológica Nacional. Facultad Regional Buenos Aires. Unidad de Investigación y Desarrollo de las Ingenierías; ArgentinaFil: Canziani, Pablo O. Universidad Tecnológica Nacional. Facultad Regional Buenos Aires. Unidad de Investigación y Desarrollo de las Ingenierías; ArgentinaFil: Canziani, Pablo O. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaAbstract: An updated climatology for the occurrence of blockings in the Southern Hemisphere (SH) using daily reanalysis data from 1948–2021 is presented. Geopotential height (z) at 500 hPa was the working variable. The blocking index (BI) was defined for every 2.5° of longitude whenever z(35° S)−z(50° S)<0. The results were organized in longitudinal bands of a width of 10° in order to compare them with previous findings. The primary region for the occurrence of blockings was located around the date line, with a secondary region in southern South America (SSA) and its vicinities, with a third-rank region situated in southern Africa and its surroundings. The results were also stratified by the intensity and duration (persistence) of the events, and the annual and seasonal differences were discussed. Additionally, three different areas were defined to study the distribution of the blockings therein, with the Pacific region (110° E–80° W) having the maximum intensities and longest durations. Linear trends were estimated for the annual and the seasonal time series of the BI and for the number of episodes. On an annual basis, more frequent and the strongest events are expected at 180° E and their surroundings in the future. An alternative BI, using radiosonde data, was built for SSA at 58.50° W. The time evolution of this index was in general agreement with the one estimated from the reanalysis data at some longitudes.Multidisciplinar Digital Publishing Institute2022info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttps://repositorio.uca.edu.ar/handle/123456789/150432073-4433 (online)10.3390/atmos13091343Yuchechen, A.E., Lakkis, S.G., Canziani, P.O. The southern hemisphere blocking index revisited[en línea]. Atmosphere. 2022, 13 (9), 1343. doi: https://doi.org/10.3390/atmos13091343. Disponible en: https://repositorio.uca.edu.ar/handle/123456789/15043Atmosphere Vol.13, No.9, 1343, 2022reponame:Repositorio Institucional (UCA)instname:Pontificia Universidad Católica ArgentinaengAmérica del Surinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/4.0/2025-07-03T10:58:50Zoai:ucacris:123456789/15043instacron:UCAInstitucionalhttps://repositorio.uca.edu.ar/Universidad privadaNo correspondehttps://repositorio.uca.edu.ar/oaiclaudia_fernandez@uca.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:25852025-07-03 10:58:50.278Repositorio Institucional (UCA) - Pontificia Universidad Católica Argentinafalse
dc.title.none.fl_str_mv The southern hemisphere blocking index revisited
title The southern hemisphere blocking index revisited
spellingShingle The southern hemisphere blocking index revisited
Yuchechen , Adrian E.
HEMISFERIO SUR
BLOQUEO
INDICE DE BLOQUEO
DATOS DE REANALISIS
DATOS DE RADIOSONDA
title_short The southern hemisphere blocking index revisited
title_full The southern hemisphere blocking index revisited
title_fullStr The southern hemisphere blocking index revisited
title_full_unstemmed The southern hemisphere blocking index revisited
title_sort The southern hemisphere blocking index revisited
dc.creator.none.fl_str_mv Yuchechen , Adrian E.
Lakkis, Susan Gabriela
Canziani, Pablo O.
author Yuchechen , Adrian E.
author_facet Yuchechen , Adrian E.
Lakkis, Susan Gabriela
Canziani, Pablo O.
author_role author
author2 Lakkis, Susan Gabriela
Canziani, Pablo O.
author2_role author
author
dc.subject.none.fl_str_mv HEMISFERIO SUR
BLOQUEO
INDICE DE BLOQUEO
DATOS DE REANALISIS
DATOS DE RADIOSONDA
topic HEMISFERIO SUR
BLOQUEO
INDICE DE BLOQUEO
DATOS DE REANALISIS
DATOS DE RADIOSONDA
dc.description.none.fl_txt_mv Fil: Yuchechen , Adrian E. Universidad Tecnológica Nacional. Facultad Regional Buenos Aires. Unidad de Investigación y Desarrollo de las Ingenierías; Argentina
Fil: Yuchechen , Adrian E. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Lakkis, S. Gabriela. Pontificia Universidad Católica Argentina. Facultad de Ingeniería y Ciencias Agrarias; Argentina
Fil: Lakkis, S. Gabriela. Universidad Tecnológica Nacional. Facultad Regional Buenos Aires. Unidad de Investigación y Desarrollo de las Ingenierías; Argentina
Fil: Canziani, Pablo O. Universidad Tecnológica Nacional. Facultad Regional Buenos Aires. Unidad de Investigación y Desarrollo de las Ingenierías; Argentina
Fil: Canziani, Pablo O. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Abstract: An updated climatology for the occurrence of blockings in the Southern Hemisphere (SH) using daily reanalysis data from 1948–2021 is presented. Geopotential height (z) at 500 hPa was the working variable. The blocking index (BI) was defined for every 2.5° of longitude whenever z(35° S)−z(50° S)<0. The results were organized in longitudinal bands of a width of 10° in order to compare them with previous findings. The primary region for the occurrence of blockings was located around the date line, with a secondary region in southern South America (SSA) and its vicinities, with a third-rank region situated in southern Africa and its surroundings. The results were also stratified by the intensity and duration (persistence) of the events, and the annual and seasonal differences were discussed. Additionally, three different areas were defined to study the distribution of the blockings therein, with the Pacific region (110° E–80° W) having the maximum intensities and longest durations. Linear trends were estimated for the annual and the seasonal time series of the BI and for the number of episodes. On an annual basis, more frequent and the strongest events are expected at 180° E and their surroundings in the future. An alternative BI, using radiosonde data, was built for SSA at 58.50° W. The time evolution of this index was in general agreement with the one estimated from the reanalysis data at some longitudes.
description Fil: Yuchechen , Adrian E. Universidad Tecnológica Nacional. Facultad Regional Buenos Aires. Unidad de Investigación y Desarrollo de las Ingenierías; Argentina
publishDate 2022
dc.date.none.fl_str_mv 2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://repositorio.uca.edu.ar/handle/123456789/15043
2073-4433 (online)
10.3390/atmos13091343
Yuchechen, A.E., Lakkis, S.G., Canziani, P.O. The southern hemisphere blocking index revisited[en línea]. Atmosphere. 2022, 13 (9), 1343. doi: https://doi.org/10.3390/atmos13091343. Disponible en: https://repositorio.uca.edu.ar/handle/123456789/15043
url https://repositorio.uca.edu.ar/handle/123456789/15043
identifier_str_mv 2073-4433 (online)
10.3390/atmos13091343
Yuchechen, A.E., Lakkis, S.G., Canziani, P.O. The southern hemisphere blocking index revisited[en línea]. Atmosphere. 2022, 13 (9), 1343. doi: https://doi.org/10.3390/atmos13091343. Disponible en: https://repositorio.uca.edu.ar/handle/123456789/15043
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/4.0/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/4.0/
dc.format.none.fl_str_mv application/pdf
dc.coverage.none.fl_str_mv América del Sur
dc.publisher.none.fl_str_mv Multidisciplinar Digital Publishing Institute
publisher.none.fl_str_mv Multidisciplinar Digital Publishing Institute
dc.source.none.fl_str_mv Atmosphere Vol.13, No.9, 1343, 2022
reponame:Repositorio Institucional (UCA)
instname:Pontificia Universidad Católica Argentina
reponame_str Repositorio Institucional (UCA)
collection Repositorio Institucional (UCA)
instname_str Pontificia Universidad Católica Argentina
repository.name.fl_str_mv Repositorio Institucional (UCA) - Pontificia Universidad Católica Argentina
repository.mail.fl_str_mv claudia_fernandez@uca.edu.ar
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score 13.13397