Multifactor Experiment and Model Integration to Determine the Regional Vulnerability of Permafrost Carbon to Climate Change. Final report
- Northern Arizona Univ., Flagstaff, AZ (United States); Northern Arizona University
The major research goal of this project was to understand and quantify the fate of carbon stored in permafrost ecosystems using a combination of field and laboratory experiments to measure and model isotope ratios and carbon fluxes in a tundra ecosystem exposed to experimental warming. Field measurements centered on a two-factor experimental warming to increase air and soil temperatures alone, and in combination, at a tundra field site in Alaska. A second manipulation of water table was embedded within the warming treatment such that both major environmental factors (temperature, moisture) controlling ecosystem carbon dynamics were experimentally altered. The experiment was interfaced with modeling activities using both data assimilation and forward modeling approaches. Models were used to make forecasts of ecosystem carbon dynamics beyond the time frame and environmental space of the experiment itself. These results were linked with ongoing synthesis and model intercomparison activities through the Permafrost Carbon Network, which led to additional synthesis publications as a result of collaboration and data sharing from this project. As key outcomes, this project has produced new papers published in the peer-reviewed literature, archived datasets used for model-data intercomparisons, trained graduate students and postdoctoral researchers, and has raised awareness about the vulnerability of permafrost carbon to a wider audience.
- Research Organization:
- Northern Arizona Univ., Flagstaff, AZ (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
- DOE Contract Number:
- SC0014085
- OSTI ID:
- 1572411
- Report Number(s):
- DOE-NAU--14085
- Country of Publication:
- United States
- Language:
- English
Large loss of CO2 in winter observed across the northern permafrost region
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journal | October 2019 |
Adding Depth to Our Understanding of Nitrogen Dynamics in Permafrost Soils
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journal | August 2018 |
Biotic responses buffer warming-induced soil organic carbon loss in Arctic tundra
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journal | June 2018 |
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