Results 21 to 30 of about 4,444 (222)
Thermokarst-lake methanogenesis along a complete talik profile [PDF]
Biogeosciences, 2015 Abstract. Thermokarst (thaw) lakes emit methane (CH4) to the atmosphere formed from thawed permafrost organic matter (OM), but the relative magnitude of CH4 production in surface lake sediments vs. deeper thawed permafrost horizons is not well understood.
J. K. Heslop +6 more
openaire +4 more sources
Periglacial Lake Origin Influences the Likelihood of Lake Drainage in Northern Alaska
Remote Sensing, 2021 Nearly 25% of all lakes on earth are located at high latitudes. These lakes are formed by a combination of thermokarst, glacial, and geological processes.
Mark Jason Lara, Melissa Lynn Chipman
doaj +1 more source
Communications Earth & Environment, 2023 Climate-driven permafrost thaw can release ancient carbon to the atmosphere, begetting further warming in a positive feedback loop. Polar ice core data and young radiocarbon ages of dissolved methane in thermokarst lakes have challenged the importance of
L. S. Brosius +5 more
doaj +1 more source
Methane emissions from northern lakes under climate change: a review
SN Applied Sciences, 2021 Northern lakes are important sources of CH4 in the atmosphere under the background of permafrost thaw and winter warming. We synthesize studies on thermokarst lakes, including various carbon sources for CH4 emission and the influence of thermokarst ...
Lingling Li, Bin Xue
doaj +1 more source
Lake‐Atmosphere Heat Flux Dynamics of a Thermokarst Lake in Arctic Siberia [PDF]
Journal of Geophysical Research: Atmospheres, 2018 AbstractWe conducted eddy covariance measurements from April to August 2014 on a Siberian thermokarst lake. The study site is located in the Lena River Delta and characterized as a floating ice lake. Heat fluxes differed in magnitudes, directions and temporal patterns depending on the lake surface conditions (“frozen” ice cover, ice cover melt, and ...
D. Franz +8 more
openaire +4 more sources
Assessing the influence of lake and watershed attributes on snowmelt bypass at thermokarst lakes [PDF]
Hydrology and Earth System Sciences, 2022 Snow represents the largest potential source of water for thermokarst lakes, but the runoff generated by snowmelt (freshet) can flow beneath lake ice and via the outlet without mixing with and replacing pre-snowmelt lake water.
E. J. Wilcox, B. B. Wolfe, P. Marsh
doaj +1 more source
Remote Sensing, 2023 The current rate and magnitude of temperature rise in the Arctic are disproportionately high compared to global averages. Along with other natural and anthropogenic disturbances, this warming has caused widespread permafrost degradation and soil ...
Lara Hughes-Allen +4 more
doaj +1 more source
Geocryological conditions triggering thermokarst processes in Central Yakutia [PDF]
E3S Web of Conferences, 2020 The use of the Central Yakutia Landsat images revealed an increase in the area of thermokarst lakes by two times for the Suola and Taatta River basins and a quarter times in the Tanda River basin during the period 2000-2019.
Nesterova Nataliia +3 more
doaj +1 more source
Decadal-scale hotspot methane ebullition within lakes following abrupt permafrost thaw
Environmental Research Letters, 2021 Thermokarst lakes accelerate deep permafrost thaw and the mobilization of previously frozen soil organic carbon. This leads to microbial decomposition and large releases of carbon dioxide (CO _2 ) and methane (CH _4 ) that enhance climate warming ...
K M Walter Anthony +18 more
doaj +1 more source
Water Body Distributions Across Scales: A Remote Sensing Based Comparison of Three Arctic Tundra Wetlands [PDF]
, 2013 Water bodies are ubiquitous features in Arctic wetlands. Ponds, i.e., waters with a surface area smaller than 104 m2, have been recognized as hotspots of biological activity and greenhouse gas emissions but are not well inventoried.
Abnizova, Anna +3 more
core +2 more sources