Climate change during the past 3.6 million years in the Arctic and Sub-antarctic region
Our research group is the first in the world to have shown that fourier transform infrared spectroscopy (FTIRS) of sediment records can be used as a quantitative multi-proxy technique for climate reconstructions (Vogel et al. 2008; Rosen et al. 2010). My main aim is to develop this technique further and use FTIRS for high-resolution climatic reconstruction during the past 3.6 million years, using five unique sediment records from Russia, Canada, Argentina, Makedonia and Finland as well as a marine sediment core from Antarctica. The first record is the longest, most continuous terrestrial records of past climate in the Arctic and will extend the climate record in the continental Arctic 30 times.
Two issues of specific interest are the synchrony of climate change on the global scale and whether global warming is typically associated with a cold reversal due to melting ice and altered ocean circulation short after warming has started. The Younger Dryas Cold Reversal is one example of such a reversal, which occurred in the beginning of the current interglacial. If this is a general phenomenon, the rapid freshening of northern ocean observed in recent decades may similarly dramatically affect future climate change scenarios.
Funding via Vetenskapsrådet (VR), FORMAS and Kempe foundation
International Continental Scientific Program