Frontiers in Earth Science, 2019 The current state of permafrost in Alaska and meaningful expectations for its future evolution are informed by long-term perspectives on previous permafrost degradation.
Lesleigh Anderson +5 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
Biogeochemical Distinctiveness of Peatland Ponds, Thermokarst Waterbodies, and Lakes
Geophysical Research Letters, 2022 AbstractSmall lentic freshwater ecosystems play a disproportionate role in global biogeochemical cycles by processing large amounts of carbon (C), nitrogen (N), and phosphorus (P), but it is unlikely that they behave as one homogenous group for the purpose of extrapolation. Here, we synthesize biogeochemical data from >12,000 geographically distinct
Julien Arsenault +8 more
openaire +3 more sources
Effect of permafrost thaw on CO2 and CH4 exchange in a western Alaska peatland chronosequence [PDF]
, 2014 Permafrost soils store over half of global soil carbon (C), and northern frozen peatlands store about 10% of global permafrost C. With thaw, inundation of high latitude lowland peatlands typically increases the surface-atmosphere flux of methane (CH4), a
Ewing, Stephanie A. +8 more
core +2 more sources
Thermokarst lake changes over the past 40 years in the Qinghai–Tibet Plateau, China
Frontiers in Environmental Science, 2022 A thermokarst lake is generally defined as a lake that occupies a closed basin and is created by the massive melting of ground ice in ice-rich permafrost regions, which has a great impact on regional hydro-ecological equilibrium and permafrost ...
Lan Li +5 more
doaj +1 more source
Regional environmental change versus local signal preservation in Holocene thermokarst lake sediments: A case study from Herschel Island, Yukon (Canada) [PDF]
, 2018 Thermokarst lakes cover nearly one fourth of ice-rich permafrost lowlands in the Arctic. Sediments from an athalassic subsaline thermokarst lake on Herschel Island (69°36′N; 139°04′W, Canadian Arctic) were used to understand regional changes in climate ...
Frenzel, Peter +8 more
core +1 more source
Landsat-Based Monitoring of Landscape Dynamics in Arctic Permafrost Region
Journal of Remote Sensing, 2022 Ice-rich permafrost thaws as a result of Arctic warming, and the land surface collapses to form characteristic thermokarst landscapes. Thermokarst landscapes can bring instability to the permafrost layer, affecting regional geomorphology, hydrology, and ...
Yating Chen, Aobo Liu, Xiao Cheng
doaj +1 more source
Bedfast and floating-ice dynamics of thermokarst lakes using a temporal deep-learning mapping approach: case study of the Old Crow Flats, Yukon, Canada [PDF]
The Cryosphere, 2023 In light of the recent climate warming, monitoring of lake ice in Arctic and subarctic regions is becoming increasingly important. Many shallow Arctic lakes and ponds of thermokarst origin freeze to the bed in the winter months, maintaining the ...
M. Shaposhnikova +3 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
Detection and spatiotemporal analysis of methane ebullition on thermokarst lake ice using high-resolution optical aerial imagery [PDF]
Biogeosciences, 2016 Thermokarst lakes are important emitters of methane, a potent greenhouse gas. However, accurate estimation of methane flux from thermokarst lakes is difficult due to their remoteness and observational challenges associated with the heterogeneous nature ...
P. R. Lindgren +3 more
doaj +1 more source