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dc.contributor.author
Martinez, Daiana Micaela
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dc.contributor.author
Solman, Silvina Alicia
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dc.date.available
2023-09-27T17:04:03Z
dc.date.issued
2022-10
dc.identifier.citation
Martinez, Daiana Micaela; Solman, Silvina Alicia; Synoptic patterns associated with extreme precipitation events over southeastern South America during spring and summer seasons; John Wiley & Sons Ltd; International Journal of Climatology; 42; 16; 10-2022; 10387-10406
dc.identifier.issn
0899-8418
dc.identifier.uri
http://hdl.handle.net/11336/213299
dc.description.abstract
This study focuses on characterizing the diversity of synoptic forcing precursors of extreme precipitation events in southeastern South America (SESA) during the warm season, as well as identifying the differences in the synoptic environment during spring (October–November–December) and summer (January–February–March). The characterization of extreme events was carried out using daily precipitation data from the CPC gridded dataset for the period 1979–2017. Extreme events were defined when the daily precipitation exceeds the 95th percentile of the daily rainy days and covers a minimum area of 100 km2. During the spring months extremes are more intense and are preferably located over the central and eastern part of SESA, while during the summer they occur towards the west and south of SESA. The associated synoptic conditions were identified after applying a principal component analysis to the 850 hPa geopotential height for extreme precipitation days using the ERA-Interim reanalysis. Two distinctive patterns for each season were identified. The anomalous intense wind with a northerly component and a negative geopotential height anomaly over northwestern Argentina emerged as the most common features associated with the occurrence of extreme events. Differences between the two patterns emerge in terms of the southward penetration of the northerly wind and the anomalous circulation off the east coast of South America. A high-level jet was detected in both patterns, although a weaker core and located in a position further south is found for the second pattern compared with the first one. Differences in the synoptic forcing features between spring and summer, such as a more intense low-level northerly wind, a deeper northwestern low, a more intense upper-level jet stream and a more extended area of maximum upper-level wind divergence during spring compared with summer, may explain the differences found in the extreme precipitation in SESA for the two seasons.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
John Wiley & Sons Ltd
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
EXTREME RAINFALL EVENTS
dc.subject
SOUTHEASTERN SOUTH AMERICA
dc.subject
SYNOPTIC PATTERNS
dc.subject
WARM SEASON
dc.subject.classification
Meteorología y Ciencias Atmosféricas
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Synoptic patterns associated with extreme precipitation events over southeastern South America during spring and summer seasons
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-07-07T22:09:17Z
dc.journal.volume
42
dc.journal.number
16
dc.journal.pagination
10387-10406
dc.journal.pais
Reino Unido
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dc.journal.ciudad
Londres
dc.description.fil
Fil: Martinez, Daiana Micaela. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Centro de Investigaciones del Mar y la Atmósfera. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Investigaciones del Mar y la Atmósfera; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias de la Atmósfera y los Océanos; Argentina. Instituto Franco-Argentino sobre Estudios del Clima y sus Impactos; Argentina
dc.description.fil
Fil: Solman, Silvina Alicia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Centro de Investigaciones del Mar y la Atmósfera. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Investigaciones del Mar y la Atmósfera; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias de la Atmósfera y los Océanos; Argentina. Instituto Franco-Argentino sobre Estudios del Clima y sus Impactos; Argentina
dc.journal.title
International Journal of Climatology
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://rmets.onlinelibrary.wiley.com/doi/10.1002/joc.7911
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1002/joc.7911
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