scholarly journals Assessment of the annual diffusive methane emission from the southern tundra thermokarst lake of Western Siberia

2019 ◽  
Vol 231 ◽  
pp. 012027
Author(s):  
V S Kazantsev ◽  
L A Krivenok
Keyword(s):  
Methane Emission ◽  
Western Siberia ◽  
Thermokarst Lake ◽  
Southern Tundra

scholarly journals Thermokarst lake waters across the permafrost zones of western Siberia

2014 ◽  
Vol 8 (4) ◽  
pp. 1177-1193 ◽  
Author(s):  
R. M. Manasypov ◽  
O. S. Pokrovsky ◽  
S. N. Kirpotin ◽  
L. S. Shirokova
Keyword(s):  
Western Siberia ◽  
Chemical Elements ◽  
Chemical Compositions ◽  
Thermokarst Lakes ◽  
Thermokarst Lake ◽  
Surface Areas ◽  
Discontinuous Permafrost ◽  
Latitudinal Position ◽  
Hydrochemical Composition ◽  
Lake Waters

Abstract. This work describes the hydrochemical composition of thermokarst lake and pond ecosystems, which are observed in various sizes with different degrees of permafrost influence and are located in the northern part of western Siberia within the continuous and discontinuous permafrost zones. We analysed the elemental chemical composition of the lake waters relative to their surface areas (from 10 to 106 m2) and described the elemental composition of the thermokarst water body ecosystems in detail. We revealed significant correlations between the Fe, Al, dissolved organic carbon (DOC) and various chemical elements across a latitude gradient covering approximately 900 km. Several groups of chemical elements that reflect the evolution of the studied water bodies were distinguished. Combining the data for the studied latitude profile with the information available in the current literature demonstrated that the average dissolved elemental concentrations in lakes with different areas depend specifically on the latitudinal position, which is presumably linked to (1) the elements leached from frozen peat, which is the main source of the solutes in thermokarst lakes, (2) marine atmospheric aerosol depositions, particularly near the sea border and (3) short-range industrial pollution by certain metals from the largest Russian Arctic smelter. We discuss the evolution of the chemical compositions observed in thermokarst lakes during their formation and drainage and predict the effect that changing the permafrost regime in western Siberia has on the hydrochemistry of the lakes.

scholarly journals CONNECTION BETWEEN THE GAS EMISSION CRATERS FORMATION AND METHANE EMISSION IN THE NORTH OF WESTERN SIBERIA

2018 ◽  
Author(s):  
М.О. Leibman ◽  
Yu.А. Dvornikov ◽  
I.D. Streletskaya ◽  
А.V. Khomutov ◽  
А.I. Kizyakov ◽  
...  
Keyword(s):  
Methane Emission ◽  
Western Siberia ◽  
Gas Emission ◽  
The North

The spatial variability of methane emission from subtaiga and forest–steppe grass–moss fens of Western Siberia

2016 ◽  
Vol 43 (2) ◽  
pp. 162-168 ◽  
Author(s):  
A. F. Sabrekov ◽  
I. V. Filippov ◽  
I. E. Terentieva ◽  
M. V. Glagolev ◽  
D. V. Il’yasov ◽  
...  
Keyword(s):  
Spatial Variability ◽  
Methane Emission ◽  
Western Siberia ◽  
Forest Steppe

scholarly journals Organic matter mineralization and trace element post-depositional redistribution in Western Siberia thermokarst lake sediments

2011 ◽  
Vol 8 (11) ◽  
pp. 3341-3358 ◽  
Author(s):  
S. Audry ◽  
O. S. Pokrovsky ◽  
L. S. Shirokova ◽  
S. N. Kirpotin ◽  
B. Dupré
Keyword(s):  
Trace Elements ◽  
Organic Matter ◽  
Organic Carbon ◽  
Lake Sediments ◽  
Water Column ◽  
Western Siberia ◽  
Ecosystem Development ◽  
Thermokarst Lake ◽  
Fe And Mn ◽  
The Impact

Abstract. This study reports the very first results on high-resolution sampling of sediments and their porewaters from three thermokarst (thaw) lakes representing different stages of ecosystem development located within the Nadym-Pur interfluve of the Western Siberia plain. Up to present time, the lake sediments of this and other permafrost-affected regions remain unexplored regarding their biogeochemical behavior. The aim of this study was to (i) document the early diagenesic processes in order to assess their impact on the organic carbon stored in the underlying permafrost, and (ii) characterize the post-depositional redistribution of trace elements and their impact on the water column. The estimated organic carbon (OC) stock in thermokarst lake sediments of 14 ± 2 kg m−2 is low compared to that reported for peat soils from the same region and denotes intense organic matter (OM) mineralization. Mineralization of OM in the thermokarst lake sediments proceeds under anoxic conditions in all the three lakes. In the course of the lake development, a shift in mineralization pathways from nitrate and sulfate to Fe- and Mn-oxyhydroxides as the main terminal electron acceptors in the early diagenetic reactions was suggested. This shift was likely promoted by the diagenetic consumption of nitrate and sulfate and their gradual depletion in the water column due to progressively decreasing frozen peat lixiviation occurring at the lake's borders. Trace elements were mobilized from host phases (OM and Fe- and Mn-oxyhydroxides) and partly sequestered in the sediment in the form of authigenic Fe-sulfides. Arsenic and Sb cycling was also closely linked to that of OM and Fe- and Mn-oxyhydroxides. Shallow diagenetic enrichment of particulate Sb was observed in the less mature stages. As a result of authigenic sulfide precipitation, the sediments of the early stage of ecosystem development were a sink for water column Cu, Zn, Cd, Pb and Sb. In contrast, at all stages of ecosystem development, the sediments were a source of dissolved Co, Ni and As to the water column. However, the concentrations of these trace elements remained low in the bottom waters, indicating that sorption processes on Fe-bounding particles and/or large-size organo-mineral colloids could mitigate the impact of post-depositional redistribution of toxic elements on the water column.

Response of Methane Emission to Temperature Anomalies of Mires: Case Study of the Southern Taiga in Western Siberia

2018 ◽  
Vol 45 (S2) ◽  
pp. 44-52 ◽  
Author(s):  
M. V. Glagolev ◽  
D. V. Ilyasov ◽  
A. F. Sabrekov ◽  
Y. V. Litti ◽  
V. M. Goncharov
Keyword(s):  
Methane Emission ◽  
Western Siberia ◽  
Southern Taiga ◽  
Temperature Anomalies

scholarly journals Sources of paleomagnetic signal in iron-bearing marine sedimentary deposits

2019 ◽  
Vol 486 (1) ◽  
pp. 53-56
Author(s):  
M. A. Rudmin ◽  
A. K. Mazurov ◽  
V. I. Sergienko ◽  
O. G. Savichev ◽  
I. P. Semiletov
Keyword(s):  
Magnetic Susceptibility ◽  
Bottom Sediments ◽  
Methane Emission ◽  
Western Siberia ◽  
Sedimentary Rocks ◽  
Magnetic Signal ◽  
Sedimentary Deposits ◽  
Two Factors ◽  
Iron Bearing

This paper presents the results of interpreting the change in the magnetic signal of ferruginous marine sedimentary rocks using the example of the Cretaceous-Paleogene Bakchar deposit (Western Siberia). Anomalous magnetic susceptibility (MS) values are determined by two factors: (a) a diagenetic process accompanied by the formation of pyrrhotite, greigite and siderite in ironstones, (b) an increase detrital input with deposition of magnetite and ilmenite in the siltstones on the background of climate moistening and intense weathering. It is shown that increased MS values in iron-bearing marine sedimentary deposits can be associated with the formation of ferrimagnetic sulfides, which indicates to the methane emission through ancient marine bottom sediments.

scholarly journals Hydrochemical composition of thermokarst lake waters in the permafrost zone of western Siberia within the context of climate change

2013 ◽  
Vol 7 (6) ◽  
pp. 5333-5387 ◽  
Author(s):  
R. M. Manasypov ◽  
O. S. Pokrovsky ◽  
S. N. Kirpotin ◽  
L. S. Shirokova
Keyword(s):  
Western Siberia ◽  
Chemical Elements ◽  
Field Work ◽  
Chemical Compositions ◽  
Thermokarst Lake ◽  
Current State ◽  
Discontinuous Permafrost ◽  
Hydrochemical Composition ◽  
Lake Waters ◽  
Thaw Lakes

Abstract. This work describes the current state of thaw lake and pond ecosystems, the mechanisms of their formation and succession, which was assessed via field work during several summer campaigns, and the laboratory analysis of water samples that were collected in the northern part of western Siberia within continuous and discontinuous permafrost zones. We analyzed the elemental chemical composition of lake waters as a function of lake diameter, over more than two orders of magnitude of the lake size, and described the peculiarities of the elemental composition of the thermokarst water body ecosystem during various stages of lake development. We revealed significant correlations between Fe, Al and dissolved organic carbon (DOC) and various chemical elements across a latitude gradient of approximately 900 km. Several groups of chemical elements were distinguished that reflect the dynamic succession of the studied area of water bodies. Combining the data of the studied latitude profile with the information available in the current literature demonstrated that the average dissolved elemental concentrations in lakes of different size ranges exhibit specific dependencies on the latitude position, which is presumably linked to (1) leaching of the elements from frozen peat, which is the main source of solutes in thermokarst lakes, (2) marine atmospheric aerosol depositions, notably at the proximity to the sea border, and (3) short-range industrial pollution of certain metals from the largest Russian arctic smelter. We discuss the evolution of thermokarst lake chemical compositions during their formation and drainage and foresee the consequences of climate warming and permafrost thaw on the hydrochemistry of the thaw lakes and ponds of western Siberia.

scholarly journals PROBLEMS OF MODELING THE SPATIAL STRUCTURE OF THERMOKARST LAKE FIELDS IN THE PERMAFROST BASED ON SATELLITE IMAGERY

2018 ◽  
Vol 14 (3) ◽  
pp. 88-100
Author(s):  
V Y Polishchuk ◽  
I N Muratov ◽  
Y M Polishchuk
Keyword(s):  
Spatial Structure ◽  
Size Distribution ◽  
Satellite Images ◽  
Western Siberia ◽  
Distribution Law ◽  
Basic Principles ◽  
Thermokarst Lakes ◽  
Pearson Criterion ◽  
Thermokarst Lake ◽  
Medium Resolution

The problems of modeling the spatial structure of the fields of thermokarst lakes in the permafrost zone of Western Siberia based on the geo-simulation approach are considered. The basic principles for the development of a geo-simulation model for the structure of thermokarst lakes fields are outlined. Experimental data on the properties of lake fields obtained on the basis of the integration of high- and medium-resolution satellite images are presented. Data analysis showed that the empirical histogram of the distribution of lakes by size is approximated by the lognormal distribution law by the Pearson criterion with a probability of 0.99. This law of distribution, in contrast to the power law of size distribution of lakes that is commonly used in such studies, also takes into account small lakes, considered as intense sources of methane emission into the atmosphere from thermokarst lakes. An example of modeling the field of thermokarst lakes with a lognormal law of their size-distribution is given.

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