Artículo

Compagnucci, R.H.; Berman, A.L.; Velasco Herrera, V.; Silvestri, G. "Are southern South American Rivers linked to the solar variability?" (2014) International Journal of Climatology. 34(5):1706-1714
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Abstract:

This article explores the Sun's influence on the hydrological cycle in southern South America (SSA) at the range of interannual-to-multidecadal scales from the early 1900s to 2011. The solar variability is described by the sunspot number (SSN) index. The hydrological cycle is examined by using annual mean discharges of the Paraná River (PAR) and the Atuel River (ATU) that represents the behaviour of the subtropical Argentinean Andean hydrological system. Wavelet-based methods are used in order to describe relationships in the entire time-frequency domain. The SSN-PAR connection is statistically weak in oscillations with period about 11years (the Schwabe's solar cycle). Therefore, the solar forcing at this scale must be considered with great caution. The periodicity about 30years is highly significant throughout the analysed period. Two potential physical mechanisms affecting the Paraná discharge could be involved: one is the solar irradiance influence on the Inter Tropical Convergence Zone (ITCZ), and the other is the solar influence on the Pacific long-term variability. The SSN-ATU connection shows by far the most striking, robust and convincing result for the Schwabe cycle. A large amplitude and statistically significant cycle with a period about 11years is observed not only in the Morlet-based global and local wavelet spectra of the Atuel discharges and SSN but also in the global and local spectra of Cross and Coherent wavelets in most of the analysed period. High (low) discharges occur following maxima (minima) of the Schwabe cycles with time lags of up to ~2years. Previous studies have shown a close relationship between the subtropical Argentinean Andean Rivers and the El Niño/Southern Oscillation (ENSO), as well as a solar influence on the ENSO variability. We suggest that El Niño events occurring a few years after solar maxima could explain the connection. Periodicities longer than 30years are suggested. © 2013 Royal Meteorological Society.

Registro:

Documento: Artículo
Título:Are southern South American Rivers linked to the solar variability?
Autor:Compagnucci, R.H.; Berman, A.L.; Velasco Herrera, V.; Silvestri, G.
Filiación:Departamento de Ciencias de la Atmósfera y los Océanos (DCAO-FCEN-UBA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
Centro de Investigaciones del Mar y la Atmósfera (CIMA)/CONICET-FCEN-UBA, UMI3351-IFAECI/CNRS-CONICET-UBA, Buenos Aires, Argentina
Instituto de Geofísica, Universidad Nacional Autónoma de México, Mexico
Palabras clave:11-year solar cycle; Atuel River discharge; Hydrological cycle; Paraná River discharge; Southern South America; Subtropical Argentinean Andean Rivers; Sunspot numbers; Wavelets transform; Climatology; Solar energy; Tropics; 11-year solar cycle; Hydrological cycles; River discharge; Southern south america; Sunspot number; Wavelets transform; Rivers; El Nino-Southern Oscillation; hydrological cycle; intertropical convergence zone; irradiance; periodicity; river discharge; solar cycle; solar radiation; sunspot; transform; Argentina; Atuel River; Parana River
Año:2014
Volumen:34
Número:5
Página de inicio:1706
Página de fin:1714
DOI: http://dx.doi.org/10.1002/joc.3784
Título revista:International Journal of Climatology
Título revista abreviado:Int. J. Climatol.
ISSN:08998418
CODEN:IJCLE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08998418_v34_n5_p1706_Compagnucci

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Citas:

---------- APA ----------
Compagnucci, R.H., Berman, A.L., Velasco Herrera, V. & Silvestri, G. (2014) . Are southern South American Rivers linked to the solar variability?. International Journal of Climatology, 34(5), 1706-1714.
http://dx.doi.org/10.1002/joc.3784
---------- CHICAGO ----------
Compagnucci, R.H., Berman, A.L., Velasco Herrera, V., Silvestri, G. "Are southern South American Rivers linked to the solar variability?" . International Journal of Climatology 34, no. 5 (2014) : 1706-1714.
http://dx.doi.org/10.1002/joc.3784
---------- MLA ----------
Compagnucci, R.H., Berman, A.L., Velasco Herrera, V., Silvestri, G. "Are southern South American Rivers linked to the solar variability?" . International Journal of Climatology, vol. 34, no. 5, 2014, pp. 1706-1714.
http://dx.doi.org/10.1002/joc.3784
---------- VANCOUVER ----------
Compagnucci, R.H., Berman, A.L., Velasco Herrera, V., Silvestri, G. Are southern South American Rivers linked to the solar variability?. Int. J. Climatol. 2014;34(5):1706-1714.
http://dx.doi.org/10.1002/joc.3784