Results 51 to 60 of about 1,593 (210)

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

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, Xindi Zhang, Xuan Li, Shufang Zhao, Wankui Ni, Zhenzhen Yang   +5 more
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, C. Duguay, C. Duguay, P. Roy-Léveillée   +3 more
doaj   +1 more source

Sedimentological, biogeomcial and geochronological data of thermokarst lake sediment core PG1967 [PDF]

, 2013
Ice-rich permafrost landscapes are sensitive to climate and environmental change due to the melt-out of ground ice during thermokarst development. Thermokarst processes in the northern Yukon Territory are currently not well-documented.
Wooller, Matthew J, Fritz, Michael, Matthew J Wooller (8013944), Lutz Schirrmeister (6961397), Wayne H Pollard (6981092), Josefine Lenz (6967892), Schirrmeister, Lutz, Wetterich, Sebastian, Michael Fritz (6974498), Pollard, Wayne H, Lenz, Josefine, Lantuit, Hugues, Hugues Lantuit (6974504), Sebastian Wetterich (6961394)   +13 more
core   +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, G. Grosse, K. M. Walter Anthony, F. J. Meyer   +3 more
doaj   +1 more source

Localized Browning in Thermokarst-Dominated Landscapes Reverses Regional Greening Trends Under a Warming Climate in Northeastern Siberia

Remote Sensing
The response of Arctic vegetation to climate warming exhibits pronounced spatial heterogeneity, driven partly by widespread permafrost degradation. However, the role of thermokarst lake development in mediating vegetation-climate interactions remains ...
Ruixin Wang, Ping Wang, Li Xu, Shiqi Liu, Qiwei Huang   +4 more
doaj   +1 more source

Thermokarst lake inception and development in syngenetic ice-wedge polygon terrain during a cooling climatic trend, Bylot Island (Nunavut), eastern Canadian Arctic [PDF]

The Cryosphere, 2020
Thermokarst lakes are widespread and diverse across permafrost regions, and they are considered significant contributors to global greenhouse gas emissions.
F. Bouchard, F. Bouchard, F. Bouchard, F. Bouchard, D. Fortier, D. Fortier, M. Paquette, V. Boucher, R. Pienitz, R. Pienitz, I. Laurion, I. Laurion   +11 more
doaj   +1 more source

Internal Structure, Kinematics, and Prehistory of Frozen Debris Lobe‐A (FDL‐A), Brooks Range, Alaska

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT Frozen Debris Lobe‐A (FDL‐A)—one of hundreds of FDLs in the Brooks Range of northern Alaska—is a slow‐moving landslide in permafrost that has been the subject of research since 2008 due to its close proximity to the Dalton Highway. Here, we synthesize more than a decade's worth of climate and surface measurements of monitored FDLs, and the ...
Margaret M. Darrow, Esther L. Babcock, Ben A. Leshchinsky   +2 more
wiley   +1 more source

Quantifying the Surface Deformation of Pingos on the Alaskan North Slope Using Interferometric Synthetic Aperture Radar (InSAR)

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT Pingos are large mounds with cores formed of intrusive ice that form in periglacial landscapes. These ice structures can form in regions of discontinuous permafrost, commonly as hydraulic or open‐system pingos, or in locations of continuous permafrost, commonly as hydrostatic or closed‐system pingos.
Venezia M. Follingstad, Roger J. Michaelides, Matthew R. Siegfried, Tyler M. Meng, John Bradford, Kynan H. G. Hughson, Alexia R. Kubas, Andrew Mullen, Enrica Quartini, Austin Routt, Hanna G. Sizemore, Andrei Swidinsky, Britney E. Schmidt   +12 more
wiley   +1 more source