Browsing by Author "Sime, Louise"
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- Composite data set of last glacial Dansgaard/Oeschger events obtained from stable oxygen isotopes in speleothemsPublication . Fohlmeister, Jens; Bores, Niklas; Marwan, Norbert; Columbu, Andrea; Rehfeld, Kira; Sekhon, Natasha; Sime, Louise; Veiga-Pires, C.Millennial scale climate variations called Dansgaard-Oeschger cycles occurred frequently during the last glacial, with their central impact on climate in the North Atlantic region. These events are, for example, well captured by the stable oxygen isotope composition in continental ice from Greenland, but also in records from other regions. Recently, it has been shown that a water isotope enabled general circulation model is able to reproduce those millennial-scale oxygen isotope changes from Greenland (Sime et al., 2019). On a global scale, this isotope-enabled model has not been tested in its performance, as stable oxygen isotope records covering those millennial scale variability were so far missing or not systematically compiled.
- Global reorganization of atmospheric circulation during Dansgaard-Oschger cyclesPublication . Fohlmeister, Jens; Sekhon, Natasha; Columbu, Andrea; Rehfeldt, Kira; Sime, Louise; Veiga-Pires, C.; Marwan, Norbert; Boers, NiklasIce core records from Greenland provide evidence for multiple abrupt warming events recurring at millennial time scales during the last glacial interval. Although climate transitions strongly resembling these Dansgaard-Oeschger (DO) transitions have been identified in several speleothem records, our understanding of the climate and ecosystem impacts of the Greenland warming events in lower latitudes remains incomplete.