High-Resolution Greenland Ice Core Data Show Abrupt Climate Change Happens in Few Years
University of Copenhagen · Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung · +5 more institutions
Abstract
The last two abrupt warmings at the onset of our present warm interglacial period, interrupted by the Younger Dryas cooling event, were investigated at high temporal resolution from the North Greenland Ice Core Project ice core. The deuterium excess, a proxy of Greenland precipitation moisture source, switched mode within 1 to 3 years over these transitions and initiated a more gradual change (over 50 years) of the Greenland air temperature, as recorded by stable water isotopes. The onsets of both abrupt Greenland warmings were slightly preceded by decreasing Greenland dust deposition, reflecting the wetting of Asian deserts. A northern shift of the Intertropical Convergence Zone could be the trigger of these…
Citation impact
- FWCI
- 43.17
- Percentile
- 100%
- References
- 34
Authors
20- JPJ. P. SteffensenCorresponding
University of Copenhagen, Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Stockholm University, National Institute of Polar Research, Institute of Applied Physics
- KKK. K. Andersen
University of Copenhagen, Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Stockholm University, National Institute of Polar Research, Institute of Applied Physics
- MBMatthias Bigler
University of Copenhagen, Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Stockholm University, National Institute of Polar Research, Institute of Applied Physics
- HCHenrik Clausen
University of Copenhagen, Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Stockholm University, National Institute of Polar Research, Institute of Applied Physics
- DDDorthe Dahl‐Jensen
University of Copenhagen, Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Stockholm University, National Institute of Polar Research, Institute of Applied Physics
Topics & keywords
- Greenland ice sheet
- Younger Dryas
- Ice core
- Climatology
- Abrupt climate change
- Interglacial
- Groenlandia
- Geology