Climate variability in the SE Alps of Italy over the past 17 000 years reconstructed from a stalagmite record
Silvia Frisia|Andrea Borsato|Christoph Spötl|Igor M. Villa|Franco Cucchi
Stalagmite SV1 from Grotta Savi, located at the SE margin of European Alps (Italy), is first Alpine speleothem that continuously spans past c. 17kyr. Extension rate and δ18Oc record for Lateglacial probably reflect a combination temperature rainfall, with rainfall exerting dominant effect. Low calcite δ18 Oc values were recorded 14.5 12.35 kyr, during GI-1 (Bølling— Allerød) interstadial, which in our interpretation, was warm wet. The GS-1 (Younger Dryas) characterized by shift to heavier Oc, coinciding δ13Cc enrichment extremely low extension (<8 μm/year). These characteristics indicate climate cool dry Alps. Calibration using historical data revealed there positive δ18Oc/dT relationship. A 1°C rise mean annual should correspond 2.85% increase SV-1 δc18Oc. We reconstructed slow steady 0.5°C since 10 kyr BP, broad agreement reconstructions pollen Europe. indicates variability has been influenced Mediterranean Sea 17 kyr.
Boreas