IANIGLA   20881
INSTITUTO ARGENTINO DE NIVOLOGIA, GLACIOLOGIA Y CIENCIAS AMBIENTALES
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
The project OXICLIM ? synthesis of oxygen isotope proxies for climate reconstruction in southern Patagonia
Autor/es:
MILAGROS RODRIGUEZ CATÓN; MELINA MAUD; CHISTOPH MAYR; ANA SRUR; A. LUCKE; JULIETA MASSAFERRO
Lugar:
Berlin
Reunión:
Conferencia; Conference and Workshop Climate Impacts on Glaciers and Biosphere in Fuego-Patagonia; 2017
Institución organizadora:
Instituto Antártico Chileno (INACH, Chile) y Humboldt-Universität zu Berlin Geographisches Institut Klimageographie
Resumen:
OXICLIM is a recently launched Argentinean-German scientific initiative intended to synthesize terrestrial climate archives in the area of Los Glaciares national park in Argentinean Patagonia. In particular, oxygen isotope proxies from tree-rings are compared with those oflake sediment along a humidity gradient from the humid Andean Nothofagus forest to the Patagonian steppe. The aim is to provide quantitative climate reconstructions using transfer functions. In the lakes, chironomid head capsules and aquatic cellulose will be used as proxiesof the oxygen isotope signal of the lake water. The lake water oxygen isotope composition itself is determined by hydrological constrains, such as the lake water balance and the intensity of the Southern Westerlies. The oxygen isotope composition of tree-rings will be analysed fromtree rings of Nothofagus pumilio taken with increment corers. The trees? oxygen isotope composition is supposed to be strongly determined by water availability and isotopic composition of the rainwater. Combining both archives, tree-rings and lake sediments, is a novel approach that best can be tested in areas with strong hydrological gradients, such asthe eastern flank of the Patagonian Andes.