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Freshwater ponds create highly dynamic Arctic tundra landscapes
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The importance of anaerobic oxidation of methane in thermokarst lakes
2023About 40% of the annual methane emissions originate from natural, non-anthropogenic sources. These include mainly freshwater sediments, in which significant increase in methane emissions has been observed throughout the past decades with the ongoing global temperature rise.
Orit Sivan +5 more
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Patterns and drivers of anaerobic nitrogen transformations in sediments of thermokarst lakes
Global Change Biology, 2023AbstractSignificant attention has been given to the way in which the soil nitrogen (N) cycle responds to permafrost thaw in recent years, yet little is known about anaerobic N transformations in thermokarst lakes, which account for more than one‐third of thermokarst landforms across permafrost regions.
Chao Mao +9 more
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Observing a Catastrophic Thermokarst Lake Drainage in Northern Alaska
Permafrost and Periglacial Processes, 2015Abstract The formation and drainage of thermokarst lakes have reshaped ice‐rich permafrost lowlands in the Arctic throughout the Holocene. North of Teshekpuk Lake, on the Arctic Coastal Plain of northern Alaska, thermokarst lakes presently occupy 22.5% of the landscape, and drained thermokarst lake basins occupy ...
Benjamin M. Jones, Christopher D. Arp
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Stochastic Modelling of Thermokarst Lakes
Thermokarst lakes are widespread and dynamic features of ice-rich permafrost landscapes. They accelerate permafrost thaw, enhance methane production, and alter soil hydrology as well as energy and water exchanges between land and atmosphere. These effects can alter local and global climate.Constanze Reinken +5 more
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Lakes as geoindicators of thermokarst landscape changes following wildfires
Environmental Monitoring and AssessmentRapid landscape changes in the Arctic are occurring at an accelerated rate. The most common disturbances that cover the largest areas of the Arctic are wildfires. It is well known that lakes serve as a good proxy for identifying thermokarst processes. However, the impact of fires is often overlooked in analyses of lake dynamics.
Piotr Janiec +2 more
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Stochastic modelling of thermokarst lake distributions
Thermokarst lakes are among the most common and dynamic landscape features in ice-rich permafrost regions. They form due to melting of ground ice and subsequent ground subsidence. Their presence and dynamic behavior do not only influence the carbon exchange with the atmosphere by accelerating permafrost thaw and facilitating the production of methane ...Constanze Reinken +4 more
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Consistent patterns of the size distribution of thermokarst lakes
Doklady Earth Sciences, 2017The purpose of this work is to study empirically the patterns of size distribution of thermokarst lakes within lacustrine thermokarst plains. Investigations were performed at 16 sites with various geomorphological, geocryological, and physical geographical conditions (Kolyma Lowland, Western Siberia, Lena River valley, Alaska).
A. S. Viktorov +8 more
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Unravelling methylmercury formation in high-altitude Tibetan thermokarst lakes
Journal of Hazardous MaterialsClimate warming accelerates permafrost degradation, which not only increases greenhouse gas emission but also the conversion of permafrost-stored mercury (Hg) to the neurotoxic methylmercury (MeHg) - a global pollutant to humans and ecosystems. While several studies have examined Hg transformation processes in high-latitude Arctic permafrost, little is
Xia Lu +7 more
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