Results 21 to 30 of about 7,581 (228)

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, Boike, Julia, Heim, Birgit, Muster, Sina   +3 more
core   +2 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., Fuller, Christopher C., Harden, Jennifer W., Johnston, Carmel E., Jorgenson, M. Torre, Koch, Joshua C., Manies, Kristen, Varner, Ruth K., Wickland, Kimberly P.   +8 more
core   +2 more sources

From permafrost soil to thermokarst lake sediment: A view from C:N:P stoichiometry

Frontiers in Environmental Science, 2022
Thermokarst lakes are formed as a result of thawing ice-rich permafrost, transforming vast permafrost soil into lake sediment and changing the biogeochemistry of carbon (C), nitrogen (N), and phosphorus (P).
Ze Ren, Ze Ren, Xia Li, Xia Li, Cheng Zhang, Cheng Zhang, Qing Wang, Qing Wang, Le Fang, Le Fang, Shengkui Cao, Jinlei Yu   +11 more
doaj   +1 more source

Eastern Beringia and beyond: Late Wisconsinan and Holocene landscape dynamics along the Yukon Coastal Plain, Canada [PDF]

, 2012
Terrestrial permafrost archives along the Yukon Coastal Plain (northwest Canada) have recorded landscape development and environmental change since the Late Wisconsinan at the interface of unglaciated Beringia (i.e.
Fritz, Michael, Lantuit, Hugues, Meyer, Hanno, Pollard, W. H., Preusser, F., Schirrmeister, Lutz, Wetterich, Sebastian   +6 more
core   +1 more source

Panarctic lakes exerted a small positive feedback on early Holocene warming due to deglacial release of methane

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, K. M. Walter Anthony, C. C. Treat, M. C. Jones, M. Dyonisius, G. Grosse   +5 more
doaj   +1 more source

Quantification of upland thermokarst features with high resolution remote sensing

Environmental Research Letters, 2013
Climate-induced changes to permafrost are altering high latitude landscapes in ways that could increase the vulnerability of the vast soil carbon pools of the region.
E F Belshe, E A G Schuur, G Grosse
doaj   +1 more source

Coastal permafrost landscape development since the Late Pleistocene in the western Laptev Sea, Siberia [PDF]

, 2011
The palaeoenvironmental development of the western Laptev Sea is understood primarily from investigations of exposed cliffs and surface sediment cores from the shelf.
Andreev, Andrei, Grigoriev, M. N., Kunitsky, V. V., Murray, A., Overduin, Pier Paul, Schirrmeister, Lutz, Winterfeld, Maria   +6 more
core   +1 more source

The use of CORONA images in remote sensing of periglacial geomorphology: an illustration from the NE Siberian coast [PDF]

, 2005
CORONA images have been used for the mapping of periglacial features on the Bykovsky Peninsula and adjacent Khorogor Valley in northeast Siberia. Features, mapped and analysed within a geographical information system, include thermokarst depressions ...
Grosse, Guido, Hubberten, Hans-Wolfgang, Kunitsky, Viktor V., Schirrmeister, Lutz   +3 more
core   +1 more source

Machine Learning and Morphometric Analysis for Evaluating the Vulnerability of Tundra Landscapes to Thermokarst Hazards in the Lena Delta: A Case Study of Arga Island

GeoHazards
Analyses of thermokarst hazard risk are becoming increasingly crucial in the context of global warming. A significant aspect of thermokarst research is the mapping of landscapes based on their vulnerability to thermokarst processes.
Andrei Kartoziia
doaj   +1 more source

Automatic Mapping of Thermokarst Landforms from Remote Sensing Images Using Deep Learning: A Case Study in the Northeastern Tibetan Plateau

Remote Sensing, 2018
Thawing of ice-rich permafrost causes thermokarst landforms on the ground surface. Obtaining the distribution of thermokarst landforms is a prerequisite for understanding permafrost degradation and carbon exchange at local and regional scales.
Lingcao Huang, Lin Liu, Liming Jiang, Tingjun Zhang   +3 more
doaj   +1 more source