TY - JOUR T1 - Abrupt drainage cycles of the Fennoscandian Ice Sheet A1 - Soulet,Guillaume A1 - Menot,Guillemette A1 - Bayon,Germain A1 - Rostek,Frauke A1 - Ponzevera,Emmanuel A1 - Toucanne,Samuel A1 - Lericolais,Gilles A1 - Bard,Edouard AD - Aix Marseille Univ, CNRS, Inst Rech Dev, Coll France, F-13545 Aix En Provence 04, France. AD - Ctr Europeen Rech & Enseignement Geosci Environm, F-13545 Aix En Provence 04, France. AD - Inst Francais Rech Exploitat Mer, Unite Rech Geosci Marines, F-29280 Plouzane, France. AD - UR - https://archimer.ifremer.fr/doc/00134/24489/ DO - 10.1073/pnas.1214676110 KW - ice dynamics KW - meltwater routing KW - European hydrographic network N2 - Continental ice sheets are a key component of the Earth’s climate system, but their internal dynamics need to be further studied. Since the last deglaciation, the northern Eurasian Fennoscandian Ice Sheet (FIS) has been connected to the Black Sea (BS) watershed, making this basin a suitable location to investigate former ice-sheet dynamics. Here, from a core retrieved in the BS, we combine the use of neodymium isotopes, high-resolution elemental analysis, and biomarkers to trace changes in sediment provenance and river runoff. We reveal cyclic releases of meltwater originating from Lake Disna, a proglacial lake linked to the FIS during Heinrich Stadial 1. Regional interactions within the climate–lake–FIS system, linked to changes in the availability of subglacial water, led to abrupt drainage cycles of the FIS into the BS watershed. This phenomenon raised the BS water level by ∼100 m until the sill of the Bosphorus Strait was reached, flooding the vast northwestern BS shelf and deeply affecting the hydrology and circulation of the BS and, probably, of the Marmara and Aegean Seas. Y1 - 2013/04 PB - Natl Acad Sciences JF - Proceedings Of The National Academy Of Sciences Of The United States Of America SN - 0027-8424 VL - 110 IS - 17 SP - 6682 EP - 6687 ID - 24489 ER -