Results 31 to 40 of about 5,638 (244)

Examining thermokarst initiation with random forest models [PDF]

, 2020
Master's Project (M.S.) University of Alaska Fairbanks, 2020This project examines thermokarst initiation through the application of random forest models. Thermokarst initiation marks the start of the formation of thermokarst features.
Spicer, Rawser W.
core  

Evolution of thermokarst in East Siberian ice-rich permafrost

, 2013
Thermokarst lakes and basins are major components of ice-rich permafrost landscapes in East Siberian coastal lowlands and are regarded as indicators of regional climatic changes.
Irina Fedorova (6975533), Julia Boike (6972533), Morgenstern, Anne, Ulrich, Mathias, Natalya A Rudaya (8012660), Günther, Frank, Sebastian Roessler (8012654), Lutz Schirrmeister (6961397), Wetterich, Sebastian, Schirrmeister, Lutz, Boike, Julia, Fedorova, Irina V, Frank Günther (6976145), Roessler, Sebastian, Mathias Ulrich (7308557), Anne Morgenstern (6976316), Rudaya, Natalia, Sebastian Wetterich (6961394)   +17 more
core   +1 more source

Susceptibility Modeling and Potential Risk Analysis of Thermokarst Hazard in Qinghai–Tibet Plateau Permafrost Landscapes Using a New Interpretable Ensemble Learning Method

Atmosphere
Climate change is causing permafrost in the Qinghai–Tibet Plateau to degrade, triggering thermokarst hazards and impacting the environment. Despite their ecological importance, the distribution and risks of thermokarst lakes are not well understood due ...
Yuting Yang, Jizhou Wang, Xi Mao, Wenjuan Lu, Rui Wang, Hao Zheng   +5 more
doaj   +1 more source

Accelerated Thermokarst Formation in the McMurdo Dry Valleys, Antarctica [PDF]

, 2013
Thermokarst is a land surface lowered and disrupted by melting ground ice. Thermokarst is a major driver of landscape change in the Arctic, but has been considered to be a minor process in Antarctica.
Okal, Marianne, Fountain, Andrew G., Watters, Jaclyn, Levy, Joseph S., Dickson, James L., Head, James W., Marchant, David R.   +6 more
core   +1 more source

A talus rock glacier in Nantlle Valley, North Wales

Journal of Quaternary Science, EarlyView.
ABSTRACT Landforms comprising mixtures of fine and coarse sediment and deposited during late glacial times are ubiquitous in the British mountains. In many cases, their interpretation has often proved contentious; as a result, the non‐generic term discrete debris accumulations (DDA) has been used to describe them and, over the last 50 years, some have ...
Stephan Harrison, Ed Anderson
wiley   +1 more source

n-Alkane concentration in thawed sediments underneath a Yedoma and Alas thermokarst lake in Eastern Siberia

, 2021
This dataset describes two 17 m long sediment cores taken from beneath two thermokarst lakes in the Yukechi Alas, Central Yakutia, Russia. The first core was taken from below an Alas thermokarst lake (YU-L7; 61.76397°N, 130.46442°E) and the second core ...
Liebner, Susanne, Knoblauch, Christian, Strauss, Jens, Mangelsdorf, Kai, Jongejans, Loeka Laura   +4 more
core   +1 more source

Identifying thermokarst lakes using deep learning and high-resolution satellite images

Science of Remote Sensing
Thermokarst lakes play a critical role in hydrologic connectivity, permafrost stability, and carbon exchange from local to regional scales. Due to the typically small sizes and highly dynamic nature of thermokarst lakes, their identification in large ...
Kuo Zhang, Min Feng, Yijie Sui, Jinhao Xu, Dezhao Yan, Zhimin Hu, Fei Han, Earina Sthapit   +7 more
doaj   +1 more source

Modeled Subsidence of Permafrost Terrain 2025–2050: North‐Central Alaska

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT A large fraction of the Alaska terrain is underlain by regolith that contains excess ice (ice that in volume exceeds the natural pore space). Possible loss of excess ice would lead to ground subsidence, which in turn would disturb and destabilize the ground surface.
Jaakko Putkonen, Hayden Patterson, Robert Chance, Mary Soaper, Anai Caparó Bellido, Aymane Ahajjam, Andrew Wilcox, Sheridan Parker, Timothy Pasch   +8 more
wiley   +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

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