Results 41 to 50 of about 4,605 (227)

A synthesis of methane dynamics in thermokarst lake environments [PDF]

Earth-Science Reviews, 2020
Abstract Greenhouse gas emissions from physical permafrost thaw disturbance and subsidence, including the formation and expansion of thermokarst (thaw) lakes, may double the magnitude of the permafrost carbon feedback this century. These processes are not accounted for in current global climate models.
Heslop, J., Walter Anthony, K., Winkel, M., Sepulveda-Jauregui, A., Martinez-Cruz, K., Bondurant, A., Grosse, G., Liebner, S.   +7 more
openaire   +3 more sources

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

Size matters: Aerobic methane oxidation in sediments of shallow thermokarst lakes

Global Change Biology, 2023
AbstractShallow thermokarst lakes are important sources of greenhouse gases (GHGs) such as methane (CH4) and carbon dioxide (CO2) resulting from continuous permafrost thawing due to global warming. Concentrations of GHGs dissolved in water typically increase with decreasing lake size due to coastal abrasion and organic matter delivery.
Manasypov, Rinat, Fan, Lichao, Lim, Artem, Krickov, Ivan, Pokrovsky, Oleg, Kuzyakov, Yakov, Dorodnikov, Maxim   +6 more
openaire   +4 more sources

Stochastic modelling of thermokarst lakes: size distributions and dynamic regimes [PDF]

The Cryosphere
Thermokarst lakes are among the most common and dynamic landscape features in ice-rich lowland permafrost regions. They influence carbon, water and energy fluxes between atmosphere and land surface, and are an important component of Arctic lowland ...
C. Reinken, C. Reinken, V. Brovkin, P. de Vrese, I. Nitze, H. Bergstedt, G. Grosse, G. Grosse   +7 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

Permafrost - physical aspects and carbon cycling, databases and uncertainties [PDF]

, 2012
Permafrost is defined as ground that remains below 0°C for at least 2 consecutive years. About 24% of the northern hemisphere land area is underlain by permafrost.
Boike, Julia, Langer, Moritz, Lantuit, Hugues, McGuire, A. D., Muster, Sina, Ovderduin, P. P., Roth, K., Sachs, Torsten, Westermann, Sebastian   +8 more
core   +1 more source

Constraining bubbling of methane from thermokarst lakes [PDF]

Eos, Transactions American Geophysical Union, 2013
In northern thermokarst lakes, which form in depressions left as permafrost thaws, methane, a greenhouse gas, can be released from lake sediments to the atmosphere through bubbling, or ebullition. Constraining the amount of methane released through bubbling would help scientists understand the role of thawing permafrost in the carbon cycle and global ...
openaire   +1 more source

Holocene thermokarst and pingo development in the Kolyma Lowland (NE Siberia) [PDF]

, 2018
Ground ice and sedimentary records of a pingo exposure reveal insights into Holocene permafrost, landscape and climate dynamics. Early to mid‐Holocene thermokarst lake deposits contain rich floral and faunal paleoassemblages, which indicate lake ...
Bobrov, Anatoly, Fritz, Michael, Günther, Frank, Matthes, Heidrun, Meyer, Hanno, Nazarova, Larisa, Opel, Thomas, Palagushkina, Olga, Pogosyan, Lilit, Savelieva, Larisa, Schirrmeister, Lutz, Syrykh, Liudmila, Wetterich, Sebastian   +12 more
core   +2 more sources

Seafloor Sediments, Morphologic Features, and Geotechnical Properties of Harrison Bay in the Alaskan Beaufort Sea

Earth and Space Science, Volume 13, Issue 5, May 2026.
Abstract Sediments on Arctic continental shelves are impacted by sea ice and ice‐related processes for up to 9 months per year. As a result, seabed morphology in cold regions can exhibit features such as ice scours which are absent on lower‐latitude shelves.
E. F. Eidam, N. Stark, J. H. Nienhuis, D. Duncan, N. Brilli, N. Kallioras, R. Smith, A. D. J. Heath   +7 more
wiley   +1 more source

Ice-rich (periglacial) vs icy (glacial) depressions in the Argyre region, Mars: a proposed cold-climate dichotomy of landforms [PDF]

, 2017
On Mars, so-called “scalloped depressions” are widely observed in Utopia Planitia (UP) and Malea Planum (MP). Typically, they are rimless, metres- to decametres-deep, incised sharply, tiered inwardly, polygonised and sometimes pitted.
Bandfield, Banks, Benn, Betterton, Black, Byrne, C. Gallagher, Costard, Dallimore, Dauber, Dohm, Dundas, El-Maarry, Forget, French, Grosse, Haberle, Harris, Head, Head, Hecht, Herzfeld, Hill, Hopkins, J.M. Dohm, Johnsson, Kääb, Lachenbruch, Lefort, Lefort, Levy, Mackay, Mackay, Mackay, Madeleine, Madeleine, Mangold, Mangold, Massé, Mellon, Milliken, Mitchell, Morgenstern, Murton, Mustard, Paul, Penner, R.J. Soare, Rampton, Reynolds, S.J. Conway, Schirrmeister, Schirrmeister, Schorghofer, Seibert, Sizemore, Soare, Soare, Soare, Soare, Soare, Soare, Soare, Séjourné, Séjourné, Séjourné, Ulrich, Wan Bun Tseung, Washburn, Williams, Willmes, Zanetti, Zent   +72 more
core   +2 more sources