Journal article
Climatic influence of the latest Antarctic isotope maximum of the last glacial period (AIM4) on Southern Patagonia
G Jouve, A Lisé-Pronovost, P Francus, AS De Coninck
Palaeogeography Palaeoclimatology Palaeoecology | ELSEVIER | Published : 2017
Abstract
This paper presents the first detailed paleoclimate reconstruction of the latest Antarctic isotope maximum (AIM4, ~ 33–29 ka cal. BP) at 52°S in continental southeastern Argentine Patagonia. High-resolution sedimentological and geochemical analyses of sediments from the maar lake Potrok Aike (PTA) reveal a decrease in the thickness of flood-induced turbidites and a series of wind burst deposits during AIM4, both pointing to increasingly drier conditions. This interpretation is also supported by a significant amount of runoff-driven micropumices incorporated within the sediments that suggests a lower lake level with canyons incising thick tephra deposits around the lake. Increased gustiness a..
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Awarded by International Continental Scientific Drilling Program (ICDP)
Funding Acknowledgements
This research is supported by the International Continental Scientific Drilling Program (ICDP) (ICDP-2007/01) in the framework of the "Potrok Aike Maar Lake Sediment Archive Drilling Project" (PASADO). Funding for drilling was provided by the ICDP, the German Science Foundation (DFG), the Swiss National Funds (SNF), the Natural Sciences and Engineering Research Council of Canada (NSERC), the Swedish Research Council - Vetenskapsradet (VR) and the University of Bremen. For their invaluable help in field logistics and drilling we thank the staff of INTA Santa Cruz and Rio Dulce Catering as well as the Moreteau family and the DOSECC crew. This project was also made possible by an NSERC Discovery and a Canada Foundation for Innovation grants to P. Francus. We acknowledge the support of NSERC and the Canadian Meteorological and Oceanographical Society (CMOS) for graduate scholarships to A. Lise-Pronovost. We also thank Quentin Simon for his relevant advices in the interpretation of the magnetic susceptibility signal.