Physical and Ecological Changes Associated with Warming Permafrost and Thermokarst in Interior Alaska
نویسندگان
چکیده
1 Geophysical Institute, University of Alaska, Fairbanks, AK, USA 2 ABR, Inc., Fairbanks, AK, USA 3 Department of Botany, University of Florida, Gainesville, FL, USA 4 Department of Civil and Environmental Engineering, University of Alaska, Fairbanks, AK, USA 5 Institute of Northern Engineering, University of Alaska, Fairbanks, AK, USA 6 Department of Geology, Moscow State University, Moscow, Russia
منابع مشابه
Quantification of upland thermokarst features with high resolution remote sensing
Climate-induced changes to permafrost are altering high latitude landscapes in ways that could increase the vulnerability of the vast soil carbon pools of the region. Permafrost thaw is temporally dynamic and spatially heterogeneous because, in addition to the thickening of the active layer, localized thermokarst features form when ice-rich permafrost thaws and the ground subsides. Thermokarst ...
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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 ...
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Changes in vegetation and soil properties following permafrost degradation and thermokarst development in peatlands may cause changes in net carbon storage. To better understand these dynamics, we established three sites in Alaska that vary in permafrost regime, including a black spruce peat plateau forest with stable permafrost, an internal collapse scar bog formed as a result of thermokarst, ...
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