Holocene environmental changes in the fuegian forest and steppe, Argentina

Environmental changes were reconstructed from a multiproxy synthesis of over 30 localities the Isla Grande de Tierra del Fuego and los Estados, southernmost South America. At local scale, results mountain forest gently undulating steppe areas integrated as well those marine environments Beagle Channel Atlantic coasts. regional with published for Andean Extra-Andean Patagonia Antarctic Peninsula. This study focuses on environmental evolution during Late Glacial-Holocene transition, Middle to Holocene transgressive-regressive hemicycle wet-dry oscillations, Medieval Climate Anomaly, Little Ice Age, tephra inputs Patagonian Andes, recent climatic warming. Most paleoenvironmental are related variations in latitudinal position intensity Southern Westerly Winds (SWW) while others associated astronomical or endogenous forcings. strong SWW, greater contribution humidity an increase rainfall gradient create windy arid conditions steppe. weak lower input advection air masses Ocean promoted humid slightly Similar trends observed between terrestrial center south Fuego, Estados Peninsula, Fuegian Patagonia. The paleoclimatic evidence reveal high variability last 10,000 years this sector Hemisphere.