Recent Shifts in Soil Dynamics on Growing Season Length, Productivity, and...
Date: Wednesday, September 28 @ 15:30:00 MDT
Topic:
by E.S. Euskirchen
In
terrestrial high-latitude regions, observations indicate recent changes in snow
cover, permafrost, and soil freeze-thaw transitions due to climate change. These modifications may result in temporal
shifts in the growing season and the associated rates of terrestrial
productivity. Changes in productivity will influence the ability of these ecosystems
to sequester atmospheric CO2. We use the Terrestrial Ecosystem Model
(TEM), which simulates the soil thermal regime, in addition to terrestrial
carbon, nitrogen and water dynamics, to explore these issues over the years
1960-2100 in extratropical regions (30˚-90˚ N).
Our results reveal noteworthy changes in snow, permafrost, growing
season length, productivity, and net carbon uptake, indicating that prediction
of terrestrial carbon dynamics from one decade to the next will require that
large-scale models adequately take into account the corresponding changes in
soil thermal regimes.
Link to Abstract
Link to Slides
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