TY - CHAP T1 - Abrupt climatic variability: Dansgaard–Oeschger events A1 - Landais,Amaelle A1 - Sanchez Goni,Maria Fernanda A1 - Toucanne,Samuel A1 - Rodrigues,Teresa A1 - Naughton,Filipa AD - UMR8212, CEA–CNRS–UVSQ–UPS, Institute of Climate and Environment Science (LSCE/IPSL), Gif-sur-Yvette, France AD - Ecole Pratique des Hautes Etudes (EPHE), PSL University, Pessac, France AD - University of Bordeaux, EPOC, UMR-CNRS 5805, Pessac, France AD - French Research Institute for Sea Exploitation (IFREMER), Marine Geoscience Research Unit, Plouzané, France AD - Portuguese Institute for Sea and Atmosphere (IPMA), Lisboa, Portugal AD - Center of Marine Sciences (CCMAR), Algarve University, Campus de Gambelas, Faro, Portugal UR - https://doi.org/10.1016/B978-0-12-823498-3.00056-X DO - 10.1016/B978-0-12-823498-3.00056-X KW - Greenland KW - millennial-scale variability KW - atmosphere KW - vegetation KW - hydrological cycle N2 - This chapter describes the millennial-scale climatic variability in the atmosphere of Greenland during the Last Glacial Cycle (MIS 5e–MIS 1, 116–14.7 cal ka BP), that is, the Dansgaard–Oeschger (D–O) cycles, and the associated global changes in greenhouse gas atmospheric concentrations, particularly CO2 and CH4, and atmospheric circulation (Ca2+ concentration and d-excess). This chapter highlights the contrasting regional impact of the D–O cycles on the North Atlantic Sea surface temperatures and the vegetation and climate across Europe, as well as the synchronicity between changes in Greenland temperature and the hydrological cycle in the tropics and midlatitudes of the Northern Hemisphere. By contrast, the shape and phasing of millennial-scale events between Greenland and Antarctica differ between the two regions. The mechanisms underlying such a variability are still under debate. Y1 - 2022 ID - 84794 ER -