Permafrost as a critical factor in paleoclimate modelling: the Younger Dryas case in Europe

Details Permafrost as a critical factor in paleoclimate modelling: the Younger Dryas case in Europe Permafrost as a critical factor in paleoclimate modelling: the Younger Dryas case in Europe

Feb 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000e%26psl.176....1r&link_type=abstract

Earth and Planetary Science Letters, Volume 176, Issue 1, p. 1-5.

Computer Science

13

Scientific paper

Simulations with an atmospheric climate model of the Younger Dryas climate, a distinct cooling event around 12 kyr cal B.P., were compared with temperature reconstructions based on fossil plant data. In one experiment we forced the model to maintain a wet and frozen soil at high latitudes to reproduce the effect of permafrost in the model. This measure resulted in a climate similar to the reconstructions with a depression of the summer temperatures in Eurasia by 4-8°C and an increase in precipitation. This suggests that permafrost may have played a more important role in driving paleoclimates (such as the Younger Dryas climate) than believed until now. This calls for re-evaluation of (paleo)climate simulations in which permafrost was not explicitly included.

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