Better explicating the strengths and shortcomings of these models will help refine projections and improve transparency in the years ahead.
Image credit: Witsawat.S.
Cheng et al. (1) provide data on oxygen-isotope δ18O in nine speleothems of Younger Dryas (YD) age from caves situated in several continents between 42°27′ N and 21°05′ S and dated by the U-Th method. They compare this data with δ18O records in several ice cores from Greenland and Antarctica that were originally dated by the radiocarbon method. While the presented YD records of δ18O and their bowl-shaped pattern (e.g., in speleothems and ice cores from the Northern Hemisphere) are similar to earlier published YD structures [e.g., lake sediment-based pollen and Cladocera inferred temperature (2) and lake sediment Th/K …
↵1To whom correspondence may be addressed. Email: evzen.stuchlik{at}yandex.com.
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Identification of the Younger Dryas onset was confused by the Laacher See volcanic eruption
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