期刊
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
卷 122, 期 1, 页码 50-75出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2016JF003852
关键词
permafrost; numerical modeling; Alaska North Slope
资金
- USGS [G14 AP00151]
- NSF [ARC-1304271]
- Next Generation Ecosystem Experiment (NGEE-Arctic) project
- State of Alaska
- Office of Biological and Environmental Research in the DOE Office of Science
- Russian Science Foundation [RNF 16-17-00102]
- Directorate For Geosciences
- Office of Polar Programs (OPP) [1304271] Funding Source: National Science Foundation
- Russian Science Foundation [16-17-00102] Funding Source: Russian Science Foundation
Thawing and freezing of Arctic soils is affected by many factors, with air temperature, vegetation, snow accumulation, and soil physical properties and soil moisture among the most important. We enhance the Geophysical Institute Permafrost Laboratory model and develop several high spatial resolution scenarios of changes in permafrost characteristics in the Alaskan Arctic in response to observed and projected climate change. The ground thermal properties of surface vegetation and soil column are upscaled using the Ecosystems of Northern Alaska map and temperature data assimilation from the shallow boreholes across the Alaska North Slope. Soil temperature dynamics are simulated by solving the 1-D nonlinear heat equation with phase change, while the snow temperature and thickness are simulated by considering the snow accumulation, compaction, and melting processes. The model is verified by comparing with available active layer thickness at the Circumpolar Active Layer Monitoring sites, permafrost temperature, and snow depth records from existing permafrost observatories in the North Slope region.
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