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Abstract:

The Paraná River, the second in discharge in South America after the Amazon River and the fifth all over the world, releases an average of more than 17 000 m3 s-1 into the Del Plata Estuary. In order to assess the causes of variations in its stable isotope composition, 120 monthly grab samples of the Paraná River, acquired on a period of 10 years at the river mouth, near Ciudad Universitaria, Buenos Aires, Argentina have been analysed for oxygen and hydrogen stable isotopes. Both, 2H and 18O showed periodic variations (δ18O between -7‰ and -3‰; δ2H between -44‰ and -15‰) that follow, shifted in ca. 4 months (average transit time of the river), the southward excursions of the intertropical convergence zone (ITCZ). Deuterium excess values (δ2H - 8δ18O) also exhibited large variations (3-18‰) and showed a positive correlation with the El Niño South Oscillation Phenomenon (ENSO) index. ENSO affects the kinetic of the evaporation process of water and modifies the degree in which ITCZ shifts southwards capturing variable amounts of deuterium-rich recycled moisture from the Amazon's basin, then precipitating on the catchment's areas of the Paraná River. © 2008 Elsevier B.V. All rights reserved.

Registro:

Documento: Artículo
Título:Large scale meteorological phenomena, ENSO and ITCZ, define the Paraná River isotope composition
Autor:Panarello, H.O.; Dapeña, C.
Filiación:Instituto de Geocronología y Geología Isotópica (INGEIS-CONICET-UBA), Pabellon INGEIS, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
Palabras clave:Deuterium excess; ENSO; ITCZ; Paraná River; Stable isotopes; Catchments; Deuterium; Hydrogen; Isotopes; Moisture; Nickel compounds; Oxygen; All over the worlds; Amazon rivers; Buenos aires , argentina; ENSO; Evaporation processes; Inter tropical convergence zones; Isotope compositions; ITCZ; Meteorological phenomenons; Periodic variations; Positive correlations; South america; Stable isotopes; Transit times; Rivers; El Nino-Southern Oscillation; hydrochemistry; hydrogen isotope; intertropical convergence zone; isotopic composition; nitrogen isotope; oxygen isotope; stable isotope; Parana River; South America
Año:2009
Volumen:365
Número:1-2
Página de inicio:105
Página de fin:112
DOI: http://dx.doi.org/10.1016/j.jhydrol.2008.11.026
Título revista:Journal of Hydrology
Título revista abreviado:J. Hydrol.
ISSN:00221694
CODEN:JHYDA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00221694_v365_n1-2_p105_Panarello

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Citas:

---------- APA ----------
Panarello, H.O. & Dapeña, C. (2009) . Large scale meteorological phenomena, ENSO and ITCZ, define the Paraná River isotope composition. Journal of Hydrology, 365(1-2), 105-112.
http://dx.doi.org/10.1016/j.jhydrol.2008.11.026
---------- CHICAGO ----------
Panarello, H.O., Dapeña, C. "Large scale meteorological phenomena, ENSO and ITCZ, define the Paraná River isotope composition" . Journal of Hydrology 365, no. 1-2 (2009) : 105-112.
http://dx.doi.org/10.1016/j.jhydrol.2008.11.026
---------- MLA ----------
Panarello, H.O., Dapeña, C. "Large scale meteorological phenomena, ENSO and ITCZ, define the Paraná River isotope composition" . Journal of Hydrology, vol. 365, no. 1-2, 2009, pp. 105-112.
http://dx.doi.org/10.1016/j.jhydrol.2008.11.026
---------- VANCOUVER ----------
Panarello, H.O., Dapeña, C. Large scale meteorological phenomena, ENSO and ITCZ, define the Paraná River isotope composition. J. Hydrol. 2009;365(1-2):105-112.
http://dx.doi.org/10.1016/j.jhydrol.2008.11.026