Hydrological instability during the Last Interglacial in central Asia: a new diatom oxygen isotope record from Lake Baikal

► A new Last Interglacial, isotopic record of diatom silica (δ18Odiatom) from Lake Baikal was investigated. ► Fluctuations in the isotopic record suggest strong teleconnections with Atlantic meridional overturning circulation. ► Millennial scale variability during Last Interglacial was significantly less pronounced than during the Holocene.