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Primeras mediciones de isótopos estables de agua y su comportamiento en fiordos de los Campos de Hielo Patagónico Sur, Chile

Cristián Rodrigo1*, Daniel López1, Erick Cifuentes2 y Francisco Fernandoy1

1Geología, Facultad de Ingeniería, Universidad Andres Bello, Quillota 980, Viña del Mar, Chile
2Departamento de Ciencias de la Tierra, Facultad de Química, Universidad de Concepción, Víctor Lamas 1290, Concepción, Chile

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Resumen

Stable isotope measurements of seawater from fjords in the Southern Patagonian Icefields area are presented for the first time. Stable water isotope variability was associated with physiographic and oceanographic factors. Isotope depletion and lower salinity were observed at lower depths, which is consistent with shallow estuarine waters. At greater depths, the characteristics of the modified Subantarctic water mass are inferred, and the glacier proximity and temperature do not show a clear relationship with the isotopic contents. These results could be a robust basis for a possible new proxy associated with changes in water masses, freshwater mixing, and paleoclimatic studies.

Palabras clave

Stable isotope, seawater analysis, fjord, Patagonia