The purpose of the Paleoclimate Action Group is to bring together new and existing lake sediment-derived paleoecological and paleoclimate records from across the circumpolar north.
These records will provide a long-term, multi-millennial ecological and climate context for more process-oriented terrestrial and atmospheric T-MOSAiC studies.
The Paleoclimate AG will seek to answer the following critical questions:
1) What are the main modes of natural variability over the last >10 000 years?
2) Can we detect human impacts on the environment (recent warming, land-use changes, atmospheric pollution)?
3) Do these changes have spatial and temporal variability? Can we identify critical thresholds?
3) How can we use these impacts to anticipate future changes? How can we manage these changes?
Images from Hudson Bay Lowlands, Arctic Canada: top predator (polar bear), primary producers (assortment of freshwater diatoms) and aerial view of landscape. Photo credits: Jon Sweetman (polar bear), Kathleen Rühland (diatoms ) and Kathryn Hargan (landscape photo)
Collecting sediment cores from lakes in the Hudson Bay Lowlands of Canada. Image taken by Bill Keller.