Item talk:Q257541
From geokb
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"name": "Wildfire-initiated talik development exceeds current thaw projections: Observations and models from Alaska's continuous permafrost zone",
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"value": "10.1029/2020GL087565",
"url": "https://doi.org/10.1029/2020GL087565"
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"journal": {
"@type": "Periodical",
"name": "Geophysical Research Letters",
"volumeNumber": "47",
"issueNumber": "15"
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"inLanguage": "en",
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"name": "Geophysical Research Letters"
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"datePublished": "2020",
"dateModified": "2020-12-11",
"abstract": "As the Arctic warms and wildfire occurrence increases, talik formation in permafrost regions is projected to expand and affect the cycling of water and carbon. Yet, few unified field and modeling studies have examined this process in detail, particularly in areas of continuous permafrost. We address this gap by presenting multimethod, multiseasonal geophysical measurements of permafrost and liquid\u2010water content that reveal substantial talik development in response to recent wildfire in continuous permafrost of boreal Alaska. Results from observation\u2010based cryohydrogeologic model simulations suggest that predisturbance subsurface conditions are key factors influencing thaw response to fire disturbance and air temperature warming. Our high\u2010resolution integrated study illustrates enhanced vulnerability of boreal continuous permafrost, with observed talik formation that exceeds coarse\u2010scale model projections by ~100\u00a0years even under the most extreme future emissions scenario. Results raise important scaling questions for representing extreme permafrost thaw phenomena of growing widespread importance in large\u2010scale predictive models.",
"description": "e2020GL087565, 11 p.",
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"name": "American Geophysical Union"
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"name": "Rey, David",
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"url": "https://www.usgs.gov/mission-areas/water-resources"
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"name": "Minsley, Burke J. bminsley@usgs.gov",
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"name": "Colorado School of Mines"
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