Antarctic Oscillation signal on precipitation anomalies over southeastern South America

The relation between the Antarctic Oscillation (AAO) and the precipitation in southeastern South America (SESA) is examined. The AAO influence is particularly strong during winter and late spring although of opposite sign. In particular during spring, AAO positive (negative) phases are associated wi...

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Detalles Bibliográficos
Publicado: 2003
Materias:
Climatology
Oscillations
Precipitation (meteorology)
Oscillation signals
Geophysics
annual variation
atmosphere-ocean coupling
El Nino-Southern Oscillation
precipitation (climatology)
teleconnection
South America
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00948276_v30_n21_pCLM3_Silvestri
http://hdl.handle.net/20.500.12110/paper_00948276_v30_n21_pCLM3_Silvestri
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00948276_v30_n21_pCLM3_Silvestri
record_format dspace
spelling paper:paper_00948276_v30_n21_pCLM3_Silvestri2023-06-08T15:09:32Z Antarctic Oscillation signal on precipitation anomalies over southeastern South America Climatology Oscillations Precipitation (meteorology) Oscillation signals Geophysics annual variation atmosphere-ocean coupling El Nino-Southern Oscillation precipitation (climatology) teleconnection South America The relation between the Antarctic Oscillation (AAO) and the precipitation in southeastern South America (SESA) is examined. The AAO influence is particularly strong during winter and late spring although of opposite sign. In particular during spring, AAO positive (negative) phases are associated with the intensification of an upper-level anticyclonic (cyclonic) anomaly, weakened (enhanced) moisture convergence and decreased (increased) precipitation over SESA. The combined influence of both ENSO and AAO on SESA precipitation was also explored and significant correlation values between both oscillations are only observed during spring. Results show that during that particular season, AAO activity produces a strong modulation of the ENSO signal on SESA precipitation. Copyright 2003 by the American Geophysical Union. 2003 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00948276_v30_n21_pCLM3_Silvestri http://hdl.handle.net/20.500.12110/paper_00948276_v30_n21_pCLM3_Silvestri
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Climatology
Oscillations
Precipitation (meteorology)
Oscillation signals
Geophysics
annual variation
atmosphere-ocean coupling
El Nino-Southern Oscillation
precipitation (climatology)
teleconnection
South America
spellingShingle Climatology
Oscillations
Precipitation (meteorology)
Oscillation signals
Geophysics
annual variation
atmosphere-ocean coupling
El Nino-Southern Oscillation
precipitation (climatology)
teleconnection
South America
Antarctic Oscillation signal on precipitation anomalies over southeastern South America
topic_facet Climatology
Oscillations
Precipitation (meteorology)
Oscillation signals
Geophysics
annual variation
atmosphere-ocean coupling
El Nino-Southern Oscillation
precipitation (climatology)
teleconnection
South America
description The relation between the Antarctic Oscillation (AAO) and the precipitation in southeastern South America (SESA) is examined. The AAO influence is particularly strong during winter and late spring although of opposite sign. In particular during spring, AAO positive (negative) phases are associated with the intensification of an upper-level anticyclonic (cyclonic) anomaly, weakened (enhanced) moisture convergence and decreased (increased) precipitation over SESA. The combined influence of both ENSO and AAO on SESA precipitation was also explored and significant correlation values between both oscillations are only observed during spring. Results show that during that particular season, AAO activity produces a strong modulation of the ENSO signal on SESA precipitation. Copyright 2003 by the American Geophysical Union.
title Antarctic Oscillation signal on precipitation anomalies over southeastern South America
title_short Antarctic Oscillation signal on precipitation anomalies over southeastern South America
title_full Antarctic Oscillation signal on precipitation anomalies over southeastern South America
title_fullStr Antarctic Oscillation signal on precipitation anomalies over southeastern South America
title_full_unstemmed Antarctic Oscillation signal on precipitation anomalies over southeastern South America
title_sort antarctic oscillation signal on precipitation anomalies over southeastern south america
publishDate 2003
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00948276_v30_n21_pCLM3_Silvestri
http://hdl.handle.net/20.500.12110/paper_00948276_v30_n21_pCLM3_Silvestri
_version_ 1768543127560257536

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