Geochemical X ray fluorescence log ratio time series data for two sediment cores, LP08 and LP16, extracted from Lago Pato, Torres del Paine, Southern Chile ...

• Main Authors: Roberts, Stephen, McCulloch, Robert, Emmings, Joseph, Davies, Sarah
• Format: Dataset
• Language: English
• Published: NERC EDS UK Polar Data Centre 2022
• Subjects: "EARTH SCIENCE","PALEOCLIMATE","LAND RECORDS","GLACIATION"; "EARTH SCIENCE","PALEOCLIMATE","LAND RECORDS","SEDIMENTS"; "EARTH SCIENCE","PALEOCLIMATE"; "EARTH SCIENCE","CLIMATE INDICATORS","PALEOCLIMATE INDICATORS","PALEOCLIMATE RECONSTRUCTIONS","LAKE LEVEL RECONSTRUCTION"; Last Glacial Maximum; Patagonia; Southern Hemisphere Westerly Winds; glaciation; lake level changes; palaeoclimate; palaeolimnology; Antarctic; Diaz; Esperanza; Magallanes; Paine; Antarc*; British Antarctic Survey
• Online Access: https://dx.doi.org/10.5285/6bd95602-f2e3-4968-8622-c4aeb71c214c; https://data.bas.ac.uk/full-record.php?id=GB/NERC/BAS/PDC/01622

The dataset comprises of X ray fluorescence log ratio time series data for two sediment cores from Lago Pato, a small lake basin at 51.3003 S, 72.6786 W and approx 33 m a.s.l., which is topographically separated from Lago del Toro in Torres del Paine (TdP). The data are used to constrain glacier dynamics and lake level change in the TdP and Ultima Esperanza region over the last approx 30,000 cal a BP (30 ka). LP08 was extracted from the current depocentre in November 2007 to March 2008. LP16 was extracted the terrestrial shoreline in November 2015. This project was funded by the Natural Environment Research Council (NERC) through the British Antarctic Survey (BAS) and an UGent BOF bilateral collaboration project. RMcC was supported by Programa Regional R17A10002 and R20F0002 (PATSER) ANID. We gratefully acknowledge the University of Magallanes (UMAG) and the University of Santiago (Carolina Diaz) for assistance with fieldwork; the NERC/SUERC AMS Radiocarbon Facility for providing initial range-finder ... : Chronology A chronology for each record was established using Accelerator Mass Spectrometry (AMS) radiocarbon dating of 21 samples from the LP08 record and 15 samples from the LP16 record. Calibration of radiocarbon ages was undertaken in OXCAL v.4.4 using the SHCal20.14C Southern Hemisphere atmosphere calibration curve (SH20). Radiocarbon ages are reported as conventional radiocarbon years BP (14C years BP) ±1sigma; and calibrated ages as 2sigma; (95.4%) ranges, median and mean calendar years BP (cal a BP and cal ka BP, relative to 1950 CE), rounded to the nearest ten years. Age-depth models were developed using Bayesian age-depth modelling software (rBACON v.2.5). Modelled age data mean ages produced by the SH20M1H (Southern Hemisphere, SHcal20, radiocarbon calibration curve) in rBACON, where M1 indicates Model 1 and H indicates the inclusion of a hiatus in the model. Geochemistry Sediment cores were collected using a UWITEC-gravity corer, Livingston piston corer and a Russian corer from the deepest point ...