Linking Danube River Activity to Alpine Ice-Sheet Fluctuations during the Last Glacial (ca. 33-17 ka BP): insights into the continental signature of Heinrich Stadials ...

• Main Authors: Martinez-Lamas, Ruth, Toucanne, Samuel, Debret, Maxime, Riboulot, Vincent, Deloffre, Julien, Boissier, Audrey, Cheron, Sandrine, Pitel-Roudaut, Mathilde, Bayon, Germain, Giosan, Liviu, Soulet, Guillaume
• Format: Dataset
• Language: unknown
• Published: SEANOE 2020
• Subjects: Greenland; Ice Sheet
• Online Access: https://dx.doi.org/10.17882/70660; http://www.seanoe.org/data/00594/70660/

Offshore archives retrieved from marine/lacustrine environments receiving sediment from large river systems are valuable Quaternary continental records. In the present study, we reconstruct the Danube River activity at the end of the last glacial period based on sedimentological, mineralogical and geochemical analyses performed on long-piston cores from the north-west Black Sea margin. Our data suggest that the Danube River produced hyperpycnal floods throughout the ca. 33-17 ka period. Four main periods of enhanced Danube flood frequency, each of 1.5-3 kyr duration, are recorded at ca. 32.5-30.5 ka (equivalent to the first part of Heinrich Stadial -HS- 3), at ca. 29-27.5 ka (equivalent to Greenland Stadial 4), at ca. 25.3-23.8 ka (equivalent to HS 2) and at ca. 22.3-19 ka. Based on mineralogical and geochemical data, we relate these events to enhanced surface melting of the Alpine Ice Sheet (AIS) that covered ~50,000 km² of the Danube watershed at the Last Glacial Maximum (LGM). Our results suggest that (i) ...