• Carbon cycling in deep thermokarst lakes: positive vs. negative feedbacks
    • Katey Walter Anthony
    • February 14, 2014

Permafrost thaw beneath deep thermokarst lakes leads to large emissions of methane and carbon dioxide to the atmosphere. In turn, these greenhouse gases contribute to global climate warming, which leads to more permafrost thaw in a positive feedback cycle. This talk will uncover sources of methane and CO2 in deep Beringian thermokarst lakes that comes from decay of organic matter from contemporary ecosystems and thawed Pleistocene-aged yedoma permafrost. The talk will also consider the magnitude of atmospheric carbon uptake by the same lakes, and the degree to which this negative feedback process mitigates greenhouse gas emissions.

Complete Seminar Schedule & Archives

  • Water and Environmental Research Center (WERC)
  • 437 Duckering
  • 306 Tanana Loop
  • PO Box 75 5860
  • Fairbanks, AK 99775-5860, USA