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In Arctic and sub-Arctic regions, snow plays a crucial role in atmospheric and hydrologic systems and has a major influence on the health and function of regional ecosystems. Warming temperatures may have a significant impact on snow and may therefore affect the entire water cycle of the region. A decrease in precipitation in the form of snow, or “snow drought”, can manifest in several ways including changes to total snowfall amounts, snow accumulation, and the timing/length of the snow season. Understanding these changes is then critical for understanding and predicting a variety of climate impacts to wildlife and ecosystems. However, little research has been conducted to date to understand how this change may...
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Permanently frozen ground, known as permafrost, is a critical feature of the Arctic landscape. As temperatures warm, permafrost is thawing, with potentially adverse impacts to infrastructure, communities, and the structure and function of Arctic ecosystems. However, the processes leading to changes in permafrost are not well understood, and there is a need to better understand the vulnerability of permafrost to thaw. Addressing these gaps in information regarding permafrost characteristics and dynamics, and what these changes will mean for human communities and ecosystems, will support management and planning efforts. This project seeks to address these gaps through several mechanisms. First researchers have synthesized...
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Permafrost is a layer of perennially frozen soil that primarily exists in and around the Arctic and Antarctic regions of the world. While a shallow near-surface soil layer (called active layer) thaws during the summer and re-freezes in the winter, the underlying permafrost remains perennially frozen, often underlying buildings, roads, and other infrastructure. As warmer temperatures become more common, thawing of permafrost could have major consequences for Alaska. Where thawing has already occurred, dramatic changes in ecosystems and existing infrastructure are evident. For example, thawing permafrost along the ocean shore and riverbanks in Northern Alaska is causing substantial coastal erosion and is impacting...
    map background search result map search result map Assessing Permafrost Changes and Related Impacts on Alaskan Infrastructure and Communities Snow Drought: Recognizing and Understanding its Impacts in Alaska Permafrost Change and Impacts on Infrastructure and Resources in Alaska: A Synthesis of Past Work Assessing Permafrost Changes and Related Impacts on Alaskan Infrastructure and Communities Snow Drought: Recognizing and Understanding its Impacts in Alaska Permafrost Change and Impacts on Infrastructure and Resources in Alaska: A Synthesis of Past Work