Reconstrucring past climatic: changes using lacustrine sedirnents frorn Laguna Comedero, NW Argentina.

PAULA VIGNONI; R. TJALLINGII; FRANCISCO CORDOBA; B. PLESSEN; GONZALO R. TORRES; LILIANA C. LUPO; ACHIM BRAUER

Hamburg

Otro; 25 Latin-American Colloquium; 2019

Universität Hamburg

Laguna Comedero is a highly variable shallow lake located in the subtropical forest of the Yungas in the foothill of the Argentine Eastern Cordillera (249 06? 54.7? S - 659 29? 7.2? W, 2,035 m asl). A multi-proxy analysis of an 11 m-long sediment record of this lake system provides new data for reconstructing the regional late Holocene climate history in this region of South America. Changes recorded in Laguna Comedero sediments reveal that the deposition in the lake varied strongly in the upper 3.5 m of the sediment record indicating an important environmental change at the beginning of the last millennium (ca. AD 1,092). Further analysis needs to be done and a detailed chronological framework is still required to reveal the link between these sediment record changes and the past climate and environmental fluctuations for this region. Thus, future results will provide important insights on the past SAMS activity in the eastern slope of the southern Central Andes