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.

scholarly journals Modeling spatial structure of thermokarst lake fields in permafrost of Western Siberia based on satellite images

2019 ◽  
Vol 19 (1) ◽  
pp. 1-10
Author(s):  
Vladimir Yu. Polishchuk ◽  
Ildar N. Muratov ◽  
Yury M. Polishchuk
Keyword(s):  
Spatial Structure ◽  
Size Distribution ◽  
Spatial Resolution ◽  
Satellite Images ◽  
Western Siberia ◽  
High Spatial Resolution ◽  
The Arctic ◽  
Landsat 8 ◽  
Small Lakes ◽  
Thermokarst Lakes

Deciphering the satellite images of medium and high spatial resolution of the northern territories of Western Siberia has been carried out using geoinformation system ArcGIS 10.3. Images of medium resolution Landsat-8 and high resolution Kanopus-V were used. Kanopus-V images alluded to determine the number and areas of small lakes, which are considered as intensive sources of methane emission into the atmosphere from thermokarst lakes. Data on the spatial characteristics of thermokarst lakes were obtained. Based on the integration of images of medium and high spatial resolution, a synthesized histogram of the distribution of lakes in a wide range of sizes was constructed, taking into account small lakes. The obtained histogram was approximated by a lognormal distribution law by the Pearson criterion with a probability of 0.99. Based on the geo-simulation approach, a new model of the spatial structure of the fields of thermokarst lakes is presented, taking into account the lognormal law of the lake size-distribution. Algorithms for modeling the spatial structure of the fields of thermokarst lakes are described. An example of modeling the field of thermokarst lakes with a lognormal law of their size-distribution is given. The practical applicability of the previously developed model with an exponential distribution of lakes in size, based on data from Landsat images, has been experimentally confirmed. The results can be used to obtain predictions of the dynamics of methane emissions from the thermokarst lakes of the Arctic zone of Northern Eurasia for the coming decades in the context of climate changes.

scholarly journals Modeling spatial structure of thermokarst lake fields in permafrost of Western Siberia based on satellite images

2019 ◽  
Vol 19 (1) ◽  
pp. 1-10
Author(s):  
Vladimir Yu Polishchuk ◽  
Ildar N Muratov ◽  
Yury M Polishchuk
Keyword(s):  
Spatial Structure ◽  
Size Distribution ◽  
Spatial Resolution ◽  
Satellite Images ◽  
Western Siberia ◽  
High Spatial Resolution ◽  
The Arctic ◽  
Landsat 8 ◽  
Small Lakes ◽  
Thermokarst Lakes

Deciphering the satellite images of medium and high spatial resolution of the northern territories of Western Siberia has been carried out using geoinformation system ArcGIS 10.3. Images of medium resolution Landsat-8 and high resolution Kanopus-V were used. Kanopus-V images alluded to determine the number and areas of small lakes, which are considered as intensive sources of methane emission into the atmosphere from thermokarst lakes. Data on the spatial characteristics of thermokarst lakes were obtained. Based on the integration of images of medium and high spatial resolution, a synthesized histogram of the distribution of lakes in a wide range of sizes was constructed, taking into account small lakes. The obtained histogram was approximated by a lognormal distribution law by the Pearson criterion with a probability of 0.99. Based on the geo-simulation approach, a new model of the spatial structure of the fields of thermokarst lakes is presented, taking into account the lognormal law of the lake size-distribution. Algorithms for modeling the spatial structure of the fields of thermokarst lakes are described. An example of modeling the field of thermokarst lakes with a lognormal law of their size-distribution is given. The practical applicability of the previously developed model with an exponential distribution of lakes in size, based on data from Landsat images, has been experimentally confirmed. The results can be used to obtain predictions of the dynamics of methane emissions from the thermokarst lakes of the Arctic zone of Northern Eurasia for the coming decades in the context of climate changes.

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 Size Distribution, Surface Coverage, Water, Carbon, and Metal Storage of Thermokarst Lakes in the Permafrost Zone of the Western Siberia Lowland

Water ◽  
2017 ◽  
Vol 9 (3) ◽  
pp. 228 ◽  
Author(s):  
Yury Polishchuk ◽  
Alexander Bogdanov ◽  
Vladimir Polishchuk ◽  
Rinat Manasypov ◽  
Liudmila Shirokova ◽  
...  
Keyword(s):  
Size Distribution ◽  
Western Siberia ◽  
Surface Coverage ◽  
Permafrost Zone ◽  
Thermokarst Lakes

scholarly journals Using geoinformation technologies for the study of small thermokarst lakes fields in the western siberia arctic based on satellite images of Kanopus-v

2018 ◽  
Vol 14 (3) ◽  
pp. 7-14
Author(s):  
Ildar N Muratov
Keyword(s):  
High Resolution ◽  
Satellite Images ◽  
Western Siberia ◽  
Test Site ◽  
The Arctic ◽  
Arctic Zone ◽  
Thermokarst Lakes ◽  
Geoinformation Technologies ◽  
High Resolution Images

Remote studies were performed with use of high-resolution images Kanopus-V at 30 test sites, located fairly evenly on the territory of the Arctic zone of Western Siberia. Data were obtained on the number of lakes and their areas in each test site. The number of lakes varied in different test sites from 135 to 1620, and the area of lakes is from 40 m2 to 400 hectares. Changes in the characteristics of the fields of small thermokarst lakes are studied depending on the landscape zoning. Changes in the density of lakes, their total area in the test areas and limnicity in the Arctic and northern subarctic landscapes are on average quite poorly expressed, but when they move to the southern subarctic zone, their values show a significant increase, which may indicate a difference in the intensity of thermokarst processes in different landscape areas.

scholarly journals Remote study of thermokarst lakes in the arctic tundra of the taimyr

2021 ◽  
Vol 60 (1) ◽  
pp. 62-71
Author(s):  
Ildar N. Muratov ◽  
Asemgul S. Ibraeva ◽  
Lilia L. Timergazina ◽  
Yury M. Polishchuk
Keyword(s):  
Size Distribution ◽  
Satellite Images ◽  
Linear Trend ◽  
Arctic Tundra ◽  
The Arctic ◽  
Arctic Zone ◽  
Thermokarst Lakes ◽  
Significant Growth ◽  
Wide Range ◽  
Sentinel 2

The results of remote studies of thermokarst lakes in the Arctic zone of the Taimyr tundra are presented. The research was carried out on the territory of 725 thousand km2. Sentinel-2 satellite images were used in the studies, which made it possible to study the peculiarities of distribution of the number, total area of the lakes and tortuosity of their coastal borders. Histograms of the distribution of the number and total areas of the lakes in an extra wide range of their sizes from 0.2 to 5000 ha are presented. The histogram of lakes size-distribution demonstrates significant growth of their number with decrease in size. Histogram of the distribution of total areas of lakes by intervals of their sizes shows that more than 80 % of total area of lakes are dominated by lakes with sizes from 2 to 1000 ha. The analysis of the histogram of the degree of tortuosity of lakes borders distribution showed that the majority of lakes have the form of the coastal lines, which differs from a circle. The dependence of the degree of tortuosity of lakes borders on the size of lakes was studied and a positive linear trend of its change with the growth of the area of lakes was established.

Diatoms in bottom sediments of thermokarst lakes of the Pechora Delta

2019 ◽  
pp. 285-290
Author(s):  
Elvira A. Zinnatova, Larisa A. Frolova ◽  
Larisa A. Frolova
Keyword(s):  
Bottom Sediments ◽  
Environmental Conditions ◽  
Sources Of Information ◽  
Thermokarst Lakes ◽  
Thermokarst Lake ◽  
Fouling Organisms ◽  
Diatom Complexes

The Northern lakes are good objects for paleoclimatic reconstructions. One of the sources of information about changes in the ecosystems of lakes are diatoms. The study of diatom complexes revealed 133 taxa belonging to 49 genera, 24 families, 13 orders and 3 classes in the bottom sediments of the thermokarst lake of the Pechora Delta. Dominated by the Holarctic representatives of benthic and fouling organisms giving preference to the alkaline environmental conditions.

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