Spatial and temporal variability of the frequency of extreme daily rainfall regime in the La Plata Basin during the 20th century

We analyzed trends, interdecadal variability, and the quantification of the changes in the frequency of daily rainfall for two thresholds: 0.1 mm and percentile 75th, using high quality daily series from 52 stations in the La Plata Basin (LPB). We observed increases in the annual frequencies in spat...

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Autores principales:	Penalba, O.C., Robledo, F.A.
Formato:	JOUR
Materias:	20th century Annual cycle Annual rainfall Austral summers Daily rainfall Extreme events Extreme rainfall High quality Inter-decadal variability La Plata basin Southern Brazil Spatial and temporal variability Uruguay Rain annual cycle decadal variation regional climate seasonal variation spatial variation twentieth century La Plata Basin
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_01650009_v98_n3_p531_Penalba
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_01650009_v98_n3_p531_Penalba
record_format	dspace
spelling	todo:paper_01650009_v98_n3_p531_Penalba2023-10-03T15:02:28Z Spatial and temporal variability of the frequency of extreme daily rainfall regime in the La Plata Basin during the 20th century Penalba, O.C. Robledo, F.A. 20th century Annual cycle Annual rainfall Austral summers Daily rainfall Extreme events Extreme rainfall High quality Inter-decadal variability La Plata basin Southern Brazil Spatial and temporal variability Uruguay Rain annual cycle decadal variation regional climate seasonal variation spatial variation twentieth century La Plata Basin We analyzed trends, interdecadal variability, and the quantification of the changes in the frequency of daily rainfall for two thresholds: 0.1 mm and percentile 75th, using high quality daily series from 52 stations in the La Plata Basin (LPB). We observed increases in the annual frequencies in spatially coherent areas. This coherence was more marked in austral summer, autumn, and spring, during which the greatest increases occurred in southern Brazil, especially during extreme events. In winter, the low and middle basins of the Río Uruguay and Río Paraná showed negative trends, some of which were significant. Interdecadal variability is well defined in the region with more pronounced positive jumps west of the basin between 1950 and 2000. This variability was particularly more marked during periods of extreme rainfall in summer, autumn, and spring, unlike in winter when extreme daily rainfall in the lower Rio Paraná basin decreased by up to 60%. The changes in the past century during extreme rainfall produced modifications in the annual rainfall cycle. The annual cycle of both indices was broader during the last period which is mainly explained by the strong decreases in winter. © Springer Science + Business Media B.V. 2009. Fil:Penalba, O.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Robledo, F.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_01650009_v98_n3_p531_Penalba
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	20th century Annual cycle Annual rainfall Austral summers Daily rainfall Extreme events Extreme rainfall High quality Inter-decadal variability La Plata basin Southern Brazil Spatial and temporal variability Uruguay Rain annual cycle decadal variation regional climate seasonal variation spatial variation twentieth century La Plata Basin
spellingShingle	20th century Annual cycle Annual rainfall Austral summers Daily rainfall Extreme events Extreme rainfall High quality Inter-decadal variability La Plata basin Southern Brazil Spatial and temporal variability Uruguay Rain annual cycle decadal variation regional climate seasonal variation spatial variation twentieth century La Plata Basin Penalba, O.C. Robledo, F.A. Spatial and temporal variability of the frequency of extreme daily rainfall regime in the La Plata Basin during the 20th century
topic_facet	20th century Annual cycle Annual rainfall Austral summers Daily rainfall Extreme events Extreme rainfall High quality Inter-decadal variability La Plata basin Southern Brazil Spatial and temporal variability Uruguay Rain annual cycle decadal variation regional climate seasonal variation spatial variation twentieth century La Plata Basin
description	We analyzed trends, interdecadal variability, and the quantification of the changes in the frequency of daily rainfall for two thresholds: 0.1 mm and percentile 75th, using high quality daily series from 52 stations in the La Plata Basin (LPB). We observed increases in the annual frequencies in spatially coherent areas. This coherence was more marked in austral summer, autumn, and spring, during which the greatest increases occurred in southern Brazil, especially during extreme events. In winter, the low and middle basins of the Río Uruguay and Río Paraná showed negative trends, some of which were significant. Interdecadal variability is well defined in the region with more pronounced positive jumps west of the basin between 1950 and 2000. This variability was particularly more marked during periods of extreme rainfall in summer, autumn, and spring, unlike in winter when extreme daily rainfall in the lower Rio Paraná basin decreased by up to 60%. The changes in the past century during extreme rainfall produced modifications in the annual rainfall cycle. The annual cycle of both indices was broader during the last period which is mainly explained by the strong decreases in winter. © Springer Science + Business Media B.V. 2009.
format	JOUR
author	Penalba, O.C. Robledo, F.A.
author_facet	Penalba, O.C. Robledo, F.A.
author_sort	Penalba, O.C.
title	Spatial and temporal variability of the frequency of extreme daily rainfall regime in the La Plata Basin during the 20th century
title_short	Spatial and temporal variability of the frequency of extreme daily rainfall regime in the La Plata Basin during the 20th century
title_full	Spatial and temporal variability of the frequency of extreme daily rainfall regime in the La Plata Basin during the 20th century
title_fullStr	Spatial and temporal variability of the frequency of extreme daily rainfall regime in the La Plata Basin during the 20th century
title_full_unstemmed	Spatial and temporal variability of the frequency of extreme daily rainfall regime in the La Plata Basin during the 20th century
title_sort	spatial and temporal variability of the frequency of extreme daily rainfall regime in the la plata basin during the 20th century
url	http://hdl.handle.net/20.500.12110/paper_01650009_v98_n3_p531_Penalba
work_keys_str_mv	AT penalbaoc spatialandtemporalvariabilityofthefrequencyofextremedailyrainfallregimeinthelaplatabasinduringthe20thcentury AT robledofa spatialandtemporalvariabilityofthefrequencyofextremedailyrainfallregimeinthelaplatabasinduringthe20thcentury
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Spatial and temporal variability of the frequency of extreme daily rainfall regime in the La Plata Basin during the 20th century

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