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Folders: ROOT > ScienceBase Catalog > National and Regional Climate Adaptation Science Centers > Alaska CASC > FY 2011 Projects > Development of the Alaska Integrated Ecosystem Model to Illustrate Future Landscape Change ( Show direct descendants )

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_ScienceBase Catalog
__National and Regional Climate Adaptation Science Centers
___Alaska CASC
____FY 2011 Projects
_____Development of the Alaska Integrated Ecosystem Model to Illustrate Future Landscape Change
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Abstract (from http://www.sciencedirect.com/science/article/pii/S0165232X1400038X#): We present an inverse modeling approach for reconstructing the effective thermal conductivity of snow on a daily basis using air temperature, ground temperature and snow depth measurements. The method is applied to four sites in Alaska. To validate the method we used measured snow densities and snow water equivalents. The modeled thermal conductivities of snow for the two interior Alaska sites have relatively low values and reach their maximum near the end of the snow season, while the conductivities at the two sites on the Alaskan North Slope are higher and reach their maximum earlier in the snow season. We show that the reconstructed...
FAIRBANKS, AK: A new scientific synthesis suggests a gradual, prolonged release of greenhouse gases from permafrost soils in Arctic and sub-Arctic regions, which may afford society more time to adapt to environmental changes, say scientists in a paper published in Nature.... This press release discusses findings from a study, Climate change and the permafrost carbon feedback, from the project, Development and Application of an Integrated Ecosystem Model for Alaska.
Abstract (from http://www.ncbi.nlm.nih.gov/pubmed/26463267): Lowland boreal forest ecosystems in Alaska are dominated by wetlands comprised of a complex mosaic of fens, collapse-scar bogs, low shrub/scrub, and forests growing on elevated ice-rich permafrost soils. Thermokarst has affected the lowlands of the Tanana Flats in central Alaska for centuries, as thawing permafrost collapses forests that transition to wetlands. Located within the discontinuous permafrost zone, this region has significantly warmed over the past half-century, and much of these carbon-rich permafrost soils are now within ~0.5 °C of thawing. Increased permafrost thaw in lowland boreal forests in response to warming may have consequences for...