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
Autores principales:	Silvestri, G.E., Vera, C.S.
Formato:	JOUR
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:	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	todo:paper_00948276_v30_n21_pCLM3_Silvestri
record_format	dspace
spelling	todo:paper_00948276_v30_n21_pCLM3_Silvestri2023-10-03T14:56:29Z Antarctic Oscillation signal on precipitation anomalies over southeastern South America Silvestri, G.E. Vera, C.S. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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 Silvestri, G.E. Vera, C.S. 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.
format	JOUR
author	Silvestri, G.E. Vera, C.S.
author_facet	Silvestri, G.E. Vera, C.S.
author_sort	Silvestri, G.E.
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
url	http://hdl.handle.net/20.500.12110/paper_00948276_v30_n21_pCLM3_Silvestri
work_keys_str_mv	AT silvestrige antarcticoscillationsignalonprecipitationanomaliesoversoutheasternsouthamerica AT veracs antarcticoscillationsignalonprecipitationanomaliesoversoutheasternsouthamerica
_version_	1807323112524480512

Antarctic Oscillation signal on precipitation anomalies over southeastern South America

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