Speaking: Andrew Christ, University of Vermont
This seminar will be live on Zoom and open to anyone interested (with a limit of 300 participants). Register in advance for this meeting.
Abstract
Climate warming is rapidly transforming Arctic ecosystems and melting the Greenland Ice Sheet (GrIS). Terrestrial records of a GrIS smaller than today and the ecosystems that emerged in formerly ice-free areas are crucial for understanding ice sheet and ecosystem sensitivity to warming, but rare due to present ice cover. Basal materials from ice cores can be a critical archive of past ice-free periods. The Camp Century ice core, collected in 1966 from northwestern Greenland, was the first ice core drilled to the bed of an ice sheet and retrieved 3.5 m of subglacial sediment. However, the subglacial sediment was incompletely studied and then misplaced for decades – until it was rediscovered in 2017. Now, we can apply modern analytical techniques to the sediment that were unimaginable at the time of its collection nearly 60 years ago.
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