Permafrost is a key cryospheric component and of global interest for better understanding climate change. This short film presents an overview of permafrost on Earth and focuses on the International Polar Year (IPY) activities of a research group from the University of Lisbon and its international partners. Video narration in Portuguese with English subtitles.
The sediment in Lake El'gygytgyn, (pronounced EL-ge-GIT-gin) located in NE Siberia, holds one of the longest records of climate change anywhere in the continental Arctic. How does sediment (clay and mud) tell us something about past climate? Proxy data! By studying the microfossils of diatoms and pollen in the sediment, we can re-construct the lake environment millions of