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Showing 1 to 16 of 16 for “"Permafrost degradation"”.
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Drivers of landscape evolution in northern ecosystems: Shrub expansion, vegetation-fire interaction, and permafrost degradation
… such as plant community composition and permafrost stability may shift in response to novel climate regimes. In the tundra of northern and northwestern Alaska, some of the most profound terrestrial responses to recent climate and environmental change have been the expansion of tall …
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Understanding the causes of streamflow changes in the Eurasian Arctic
… may imply a release of water from storage via permafrost degradation. For many of the Eurasian rivers, an increase in annual streamflow volume has been accompanied by a shift in seasonality. However, the signature of these changes in forcings and/or internal hydrologic dynamics are potentially …
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Characterisation and evolution of periglacial landscapes in Northern Siberia during the Late Quaternary : remote sensing and GIS studies
… in the northern hemisphere are underlayed by permafrost in various states. Permafrost aggradation occurs under special environmental conditions with overall low annual precipitation rates and very low mean annual temperatures. Because the general permafrost occurrence is mainly driven by …
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Advancing Arctic coastal erosion measurement and monitoring through UAV-SfM, satellite imagery, and object-based image analysis
… of erosion in the World due to the presence of permafrost. Rates of erosion are expected to increase with warming air and water temperatures, reductions in Arctic sea ice extent and duration, sea level rise, and increased storm severity and frequency. Erosion of Arctic coasts can lead to rapid …
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Thermokarst and thermal erosion : degradation of Siberian ice-rich permafrost
… rest of the world. This has profound effects on permafrost that underlies most of the arctic land area. Permafrost thawing can lead to the liberation of considerable amounts of greenhouse gases as well as to significant changes in the geomorphology, hydrology, and ecology of the corresponding …
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Hydrological and Hydrochemical Responses From Thawing Permafrost in the Canadian Arctic
… in watersheds impacted by thermal and physical permafrost disturbances, (3) which key factors control permafrost chemistry and runoff solute loads, and (4) where in the Canadian Arctic are changes to surface water chemistry expected to be the most pronounced with continued climate warming. …
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Integrating the effects of climate change and caribou herbivory on vegetation community structure in low Arctic tundra
… of tundra ecosystems through its effects on permafrost degradation and nutrient cycling, and to cause positive feedbacks to global climate change through its impacts on carbon balance and albedo. Experimental evidence indicates that tundra plant growth is most strongly limited by soil …
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A Framework for Evaluating Thaw Settlement in Permafrost Regions
Permafrost degradation due to climate change threatens infrastructure stability in cold regions, leading to ground subsidence, structural instability, and increased maintenance costs. Accurate thaw settlement prediction is essential for mitigating these effects and ensuring infrastructure …
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The Relationship between Wildfire Dynamics and Soil Carbon in Boreal Forests of Alaska: Forest Management for Emissions Reduction in a Changing Climate
… influenced by a combination of climate change, permafrost dynamics, vegetative composition, and fire regimes. Data and literature establish that the boreal region of Alaska (and the rest of the Arctic) has been steadily warming at a rate nearly double that of lower latitudes. This warming has …
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Forced and Unforced Permafrost Changes in the Northern Hemisphere during 1901-2100
<p>Permafrost regions are very sensitive to rapid changes in climate and environment. In recent decades, there has been growing interest to better understand the permafrost degradation over the Northern Hemisphere in the context of human-induced climate change. Understanding permafrost dynamics is …
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Spatiotemporal dynamics of carbon cycling and thermokarst in response to climate and fire-regime changes in the Arctic tundra biome
… tundra ecosystems, including soil carbon stock, permafrost stability and vegetation types. However, it remains poorly understood how tundra ecosystems will feedback to the combined forces of changing climate and fire disturbance. In this study, I integrated paleoecology, numerical modeling and …
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Spatiotemporal Distribution of Siberian Wildfires and Impacts from Meteorological and Climatic Factors
… forest and organic soil layers regulated by permafrost degradation serve as the main fuel types. Against the backdrop of permafrost degradation and northward vegetation expansion, this region has shown a marked increase in both burned area and carbon emissions in recent years, accompanied by …
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Thermokarst dynamics in central-eastern Beringia
… to accelerate in the future, in particular in permafrost regions which are sensitive to climate warming. To assess current and future developments, it is crucial to understand past environmental dynamics in these landscapes. Causes and interactions of environmental variability can hardly be …
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Biogeochemical and ecological responses to warming climate in High Arctic polar deserts
… amount of soil organic carbon (SOC) in the permafrost and to emit higher amounts of the main greenhouse gases (GHGs) than previously expected. However, the mechanisms of the main GHG production are not clear. Furthermore, polar deserts are predicted to dramatically transform under rapidly …
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Tundra fire driven surface subsidence increases spectral diversity on the Yukon-Kuskokwim Delta, Alaska
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-03-01 without embargo terms
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Impacts of model-data uncertainties on biogeophysical-biogeochemical interactions in a land surface model (with an emphasis on the northern high-latitude regions)
… in modeling soil/snow physics on historical permafrost area, temperature, and degradation rates in the northern high-latitudes (45—90oN), and (2) compare the relative impact of these improvements with modeling uncertainties due to climate, and land-use and land-cover change datasets. …