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Glacio-climatic, geocryologic and hydrological changes at King George Island.

Posted by Adrian Silva Busso & Hernán Sala (IAA), Argentina on 4 February 2011

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Glacio-climatic, geocryologic and hydrological changes at 25 de Mayo (King George) Island. Advances 02/03/2011

(translation to English, see below)

Para evaluar el balance de masa del glaciar Fourcade (Warszawa) a lo largo del año glaciológico actual se están realizando dos tipos de estudios. Por un lado una observación directa mediante el uso de estacas que fueron colocadas en el glaciar mencionado entre Agosto y Octubre del 2010 por Matthias Braun (Universidad de Fairbanks, Alaska), Ulrike Falk (Universidad de Bonn, Alemania) y Evgueniy Yermolin (IAA). Se ha medido la altura de las estacas cada 15 días y se continuará hasta la llegada del fin del verano.

 

water mixing of subterranean water (right, red color) and surface run-off (to the left - clear water)
mezclas de aguas subterraneas (derecha, color rojo) con las aguas superficiales (izquierda, casi transparente)

 

Un segundo estudio se relaciona con trabajos hidrogeológicos en las cuencas de los arroyos Potter Norte y Sur que reciben parcialmente el aporte de agua de un sector del glaciar Fourcade (Warsawa). El objetivo es complementar el balance de masa glaciario. Además permitirá desarrollar el modelo hidrogeológico de comportamiento local y la relación agua superficial/subterránea. Esto último es importante para ayudar a comprender los diferentes aportes de sedimentos y los volumenes de agua dulce hacia la Caleta Potter desde la costa. Para cumplir con estos objetivos en el campo se realizan perfiles de cauces, mediciones sistemáticas de velocidades de flujo, perforaciones al acuífero suprapermafrost, muestreo hidroquímico, sondeos eléctricos verticales, etc. Las tareas las realiza un grupo de trabajo interdisciplinario compuesto por Natalia Herrera (SMN, Arg.), Tamara Manograsso Czalbowski (IAA), Hernán Sala (IAA) y Adrian Silva Busso (INA Arg.). El grupo agradece la colaboración de Pablo Pölcher en las tareas de campo.

Water sampling

Measurements of flow velocity

Mixing of water with different water types

 

Glacio-climatic, geocryologic and hydrological changes at 25 de Mayo (King George) Island. Advances 02/03/2011

To establish the mass balance of Fourcade Glacier (Warszawa Ice field) throughout the current glaciological year we are conducting two kinds of studies. The first one consists of a direct observation by means of stakes placed by Matthias Braun (University of Alaska Fairbanks), Ulrike Falk (University of Bonn, Germany) and Evgeniy Yermolin (IAA, Buenos Aires, Argentina) at the beginning of the field season in November. The stakes serve a high resolution study of the acute change of precipitation and glacier mass balance. Now, the height of the stakes is measured on the glacier throughout the spring seasons every 15 days until the end of this summer.

A second approach is related to hydrogeological studies in the Potter stream basin, which receives part of its water supply from a sector of Fourcade Glacier. The aim of the hydrological studies (water mass balance) is to complement the glacier ice mass balance, to develop a local hydrological model and to infer the relationship between stream and ground waters. This is necessary to understand the different contributions of sediments and fresh water to Potter Cove from the inland of the island. To accomplish these objectives we are measuring the stream profile, monitoring flow velocities and temperatures, performing vertical electric soundings, and hydrochemical sampling. These tasks are being performed by an interdisciplinary group composed by Natalia Herrera (SMN, Arg.), Tamara Manograsso Czalbowski (IAA), Hernán Sala (IAA) and Adrian Silva Busso (INA Arg.). We appreciate the helpful assistance of Pablo Pölcher (IAA).

 


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  • Buenisimo! muy interesante! Sigan adelante!

    Posted by eri, 04/02/2011 9:22pm (11 years ago)

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