Interdecadal and interannual variations of annual and extreme precipitation over central-northeastern Argentina

Long, annual precipitation time series from central-northeastern Argentina are analysed with special attention to interdecadal and interannual variations. The results show a variability that is highly nonstationary. The most outstanding feature is the difference in annual precipitation before and af...

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Autores principales: Penalba, O.C., Vargas, W.M.
Formato: JOUR
Materias:
Annual variability
Decadal variability
Extreme events
Rainfall
Climatology
Environmental engineering
Harmonic analysis
Spectrum analysis
Tropical engineering
Wavelet transforms
Interdecadal variability
Interdecadal variations
Power spectrum
Precipitation (meteorology)
annual variation
anomaly
decadal variation
extreme event
harmonic analysis
precipitation (climatology)
Argentina
South America
Western Hemisphere
World
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_08998418_v24_n12_p1565_Penalba
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_08998418_v24_n12_p1565_Penalba
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spelling todo:paper_08998418_v24_n12_p1565_Penalba2023-10-03T15:44:14Z Interdecadal and interannual variations of annual and extreme precipitation over central-northeastern Argentina Penalba, O.C. Vargas, W.M. Annual variability Decadal variability Extreme events Rainfall Climatology Environmental engineering Harmonic analysis Spectrum analysis Tropical engineering Wavelet transforms Interdecadal variability Interdecadal variations Power spectrum Precipitation (meteorology) annual variation anomaly decadal variation extreme event harmonic analysis precipitation (climatology) Argentina South America Western Hemisphere World Long, annual precipitation time series from central-northeastern Argentina are analysed with special attention to interdecadal and interannual variations. The results show a variability that is highly nonstationary. The most outstanding feature is the difference in annual precipitation before and after the 1950s. The interdecadal variability is particularly well defined in the west, and there is a significant linear trend in the study area. Negative anomalies of the areal-averaged annual precipitation can be observed in all the areas around 1910 and 1930 or 1940. In the western zone there are two better-defined negative periods around 1950 and 1970, and a gradual increase can be observed in the eastern zones starting in the 1950s. The interdecadal and interannual variations affect the behaviour of extreme precipitation on the annual scale and during the months with maximum precipitation in the region. In support of these conclusions, different representation methods are used (running means, power spectrum analysis, and wavelet transforms). The variations in the annual cycle of extreme precipitation under different conditions are analysed by applying harmonic analysis. The wettest years are represented by an annual and semi-annual cycle, whereas dry years need the input of lower frequency cycles. © 2004 Royal Meteorological Society. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_08998418_v24_n12_p1565_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 Annual variability
Decadal variability
Extreme events
Rainfall
Climatology
Environmental engineering
Harmonic analysis
Spectrum analysis
Tropical engineering
Wavelet transforms
Interdecadal variability
Interdecadal variations
Power spectrum
Precipitation (meteorology)
annual variation
anomaly
decadal variation
extreme event
harmonic analysis
precipitation (climatology)
Argentina
South America
Western Hemisphere
World
spellingShingle Annual variability
Decadal variability
Extreme events
Rainfall
Climatology
Environmental engineering
Harmonic analysis
Spectrum analysis
Tropical engineering
Wavelet transforms
Interdecadal variability
Interdecadal variations
Power spectrum
Precipitation (meteorology)
annual variation
anomaly
decadal variation
extreme event
harmonic analysis
precipitation (climatology)
Argentina
South America
Western Hemisphere
World
Penalba, O.C.
Vargas, W.M.
Interdecadal and interannual variations of annual and extreme precipitation over central-northeastern Argentina
topic_facet Annual variability
Decadal variability
Extreme events
Rainfall
Climatology
Environmental engineering
Harmonic analysis
Spectrum analysis
Tropical engineering
Wavelet transforms
Interdecadal variability
Interdecadal variations
Power spectrum
Precipitation (meteorology)
annual variation
anomaly
decadal variation
extreme event
harmonic analysis
precipitation (climatology)
Argentina
South America
Western Hemisphere
World
description Long, annual precipitation time series from central-northeastern Argentina are analysed with special attention to interdecadal and interannual variations. The results show a variability that is highly nonstationary. The most outstanding feature is the difference in annual precipitation before and after the 1950s. The interdecadal variability is particularly well defined in the west, and there is a significant linear trend in the study area. Negative anomalies of the areal-averaged annual precipitation can be observed in all the areas around 1910 and 1930 or 1940. In the western zone there are two better-defined negative periods around 1950 and 1970, and a gradual increase can be observed in the eastern zones starting in the 1950s. The interdecadal and interannual variations affect the behaviour of extreme precipitation on the annual scale and during the months with maximum precipitation in the region. In support of these conclusions, different representation methods are used (running means, power spectrum analysis, and wavelet transforms). The variations in the annual cycle of extreme precipitation under different conditions are analysed by applying harmonic analysis. The wettest years are represented by an annual and semi-annual cycle, whereas dry years need the input of lower frequency cycles. © 2004 Royal Meteorological Society.
format JOUR
author Penalba, O.C.
Vargas, W.M.
author_facet Penalba, O.C.
Vargas, W.M.
author_sort Penalba, O.C.
title Interdecadal and interannual variations of annual and extreme precipitation over central-northeastern Argentina
title_short Interdecadal and interannual variations of annual and extreme precipitation over central-northeastern Argentina
title_full Interdecadal and interannual variations of annual and extreme precipitation over central-northeastern Argentina
title_fullStr Interdecadal and interannual variations of annual and extreme precipitation over central-northeastern Argentina
title_full_unstemmed Interdecadal and interannual variations of annual and extreme precipitation over central-northeastern Argentina
title_sort interdecadal and interannual variations of annual and extreme precipitation over central-northeastern argentina
url http://hdl.handle.net/20.500.12110/paper_08998418_v24_n12_p1565_Penalba
work_keys_str_mv AT penalbaoc interdecadalandinterannualvariationsofannualandextremeprecipitationovercentralnortheasternargentina
AT vargaswm interdecadalandinterannualvariationsofannualandextremeprecipitationovercentralnortheasternargentina
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