Results 171 to 180 of about 1,593 (210)

Stochastic modelling of thermokarst lake distributions

Thermokarst lakes are among the most common and dynamic landscape features in ice-rich permafrost regions. They form due to melting of ground ice and subsequent ground subsidence. Their presence and dynamic behavior do not only influence the carbon exchange with the atmosphere by accelerating permafrost thaw and facilitating the production of methane ...
Constanze Reinken, Victor Brovkin, Philipp de Vrese, Ingmar Nitze, Helena Bergstedt   +4 more
openaire   +1 more source

Consistent patterns of the size distribution of thermokarst lakes

Doklady Earth Sciences, 2017
The purpose of this work is to study empirically the patterns of size distribution of thermokarst lakes within lacustrine thermokarst plains. Investigations were performed at 16 sites with various geomorphological, geocryological, and physical geographical conditions (Kolyma Lowland, Western Siberia, Lena River valley, Alaska).
A. S. Viktorov, V. N. Kapralova, T. V. Orlov, O. N. Trapeznikova, M. V. Arkhipova, P. V. Berezin, A. V. Zverev, E. N. Panchenko, S. A. Sadkov   +8 more
openaire   +1 more source

Unravelling methylmercury formation in high-altitude Tibetan thermokarst lakes

Journal of Hazardous Materials
Climate warming accelerates permafrost degradation, which not only increases greenhouse gas emission but also the conversion of permafrost-stored mercury (Hg) to the neurotoxic methylmercury (MeHg) - a global pollutant to humans and ecosystems. While several studies have examined Hg transformation processes in high-latitude Arctic permafrost, little is
Xia Lu, Xiaosha Liu, Zhixia Yang, Liang Li, Man Yang, Yu-Rong Liu, Baohua Gu, Cuicui Mu   +7 more
openaire   +2 more sources

The Evolution of Methane Emissions in Thermokarst Lakes  

Thermokarst lakes, formed by permafrost thaw in the Arctic, are ubiquitous with abrupt permafrost thaw and large atmospheric source "hotspots" of methane (CH4) and carbon dioxide (CO2) emissions, which are expected to double permafrost carbon emissions by the end of the century.
Orit Sivan, Andre Pellerin, Yarden Gerera, Efrat Eilani Russak, Katey Walter Anthony   +4 more
openaire   +1 more source

Thermokarst lake to lagoon transitions in Eastern Siberia

2020
As the Arctic coast erodes, it drains thermokarst lakes, transforming them into lagoons, and, eventually, integrates them into subsea permafrost. Lagoons represent the first stage of a thermokarst lake transition to a marine setting and possibly more saline and colder upper boundary conditions.
Angelopoulos, Michael (Dr.), Overduin, Pier Paul (Dr.), Westermann, Sebastian, Tronicke, Jens (Prof. Dr.), Strauß, Jens (Dr.), Schirrmeister, Lutz (Dr.), Biskaborn, Boris (Prof.), Liebner, Susanne (Prof. Dr.), Maksimov, Georgii, Grigoriev, Mikhail N., Grosse, Guido (Prof. Dr.)   +10 more
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Observing a Catastrophic Thermokarst Lake Drainage in Northern Alaska

Permafrost and Periglacial Processes, 2015
AbstractThe formation and drainage of thermokarst lakes have reshaped ice‐rich permafrost lowlands in the Arctic throughout the Holocene. North of Teshekpuk Lake, on the Arctic Coastal Plain of northern Alaska, thermokarst lakes presently occupy 22.5% of the landscape, and drained thermokarst lake basins occupy 61.8%.
Benjamin M. Jones, Christopher D. Arp
openaire   +1 more source

Investigating effects of thermokarst lakes on permafrost under equilibrium conditions

Science of The Total Environment
The degradation of permafrost due to climate change has significant effects on the hydrological processes and ecosystems in arctic and subarctic regions. Thermokarst lakes, formed from permafrost thaw and subsidence, play a crucial role in this process by influencing heat storage and exchange and accelerating the thaw rate of the surrounding permafrost.
Henry, Brisebois, Jason, Olsthoorn, Élise, Devoie   +2 more
openaire   +2 more sources

On the thermal influence of thermokarst lakes on the subsea permafrost evolution

SPIE Proceedings, 2016
A one-dimensional model for the heat transfer with a phase change is proposed to simulate the dynamics of the subsea permafrost on the Laptev Sea shelf. By now we investigate the evolution of the subsea permafrost since the last glacial maximum, taking into account a possible development of the thermokarst lakes.
openaire   +1 more source

Interannual variations in the areas of thermokarst lakes in Central Yakutia

Water Resources, 2013
At present, close attention is given to studies of thermokarst lakes from the standpoint of cryolite zone response to global climate warming. However, other factors, which have an effect on the variation in areas of lakes, in particular, the atmospheric precipitation, receive little attention, while the atmospheric precipitation is one of the main ...
openaire   +1 more source

Thermokarst lake changes along the Qinghai-Tibet Highway during 1991–2020

Geomorphology, 2023
Cuicui Mu, Yuan Qiao, Mei Mu
exaly