Regionalization of the West Siberian Plain from thermal regime of soils

Trofimova, I. E.; Balybina, A. S.

doi:10.1134/s1875372815030038

Cited by 12 publications

(4 citation statements)

References 2 publications

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“…Temperature gradients determine the heterogeneity of the soil cover functioning [17]. The vegetation cover causes the most significant influence on the soil thermal regime, mosslichen layer, and organic soil layer [18][19][20][21]. The temperature of the upper soil layer (0-0.4 m of depth) depends on the thermal insulating properties of moss and lichen covers and on the thickness of the organic soil horizon [21][22][23], as well as on the tree stand crown canopy [24].…”

Section: Introductionmentioning

confidence: 99%

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Soil Temperature in Disturbed Ecosystems of Central Siberia: Remote Sensing Data and Numerical Simulation

Ponomareva

Litvintsev

Finnikov

et al. 2021

Forests

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We investigated changes in the temperature regime of post-fire and post-technogenic cryogenic soils of Central Siberia using remote sensing data and results of numerical simulation. We have selected the time series of satellite data for two variants of plots with disturbed vegetation and on-ground cover: natural ecosystems of post-fire plots and post-technogenic plots with reclamation as well as dumps without reclamation. Surface thermal anomalies and temperature in soil horizons were evaluated from remote data and numerical simulation and compared with summarized experimental data. We estimated the influence of soil profile disturbances on the temperature anomalies forming on the surface and in soil horizons based on the results of heat transfer modeling in the soil profile. According to remote sensing data, within 20 years, the thermal insulation properties of the vegetation cover restore in the post-fire areas, and the relative temperature anomaly reaches the level of background values. In post-technogenic plots, conditions are more “contrast” comparing to the background, and the process of the thermal regime restoration takes a longer time (>60 years). Forming “neo-technogenic ecosystems” are distinct in special thermal regimes of soils that differ from the background ones both in reclamated and in non-reclamated plots. An assumption was made of the changes in the moisture content regime as the main factor causing the long-term existence of thermal anomalies in the upper soil horizons of disturbed plots. In addition, we discussed the formation of transition zones (“ecotones”) along the periphery of the disturbed plots due to horizontal heat transfer.

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Section: Introductionmentioning

confidence: 99%

“…The temperature of the upper soil layer (0-0.4 m of depth) depends on the thermal insulating properties of moss and lichen covers and on the thickness of the organic soil horizon [21][22][23], as well as on the tree stand crown canopy [24]. Heat exchange in soils depends also on the granulometric composition of mineral horizons [18].…”

Section: Introductionmentioning

confidence: 99%

Soil Temperature in Disturbed Ecosystems of Central Siberia: Remote Sensing Data and Numerical Simulation

Ponomareva

Litvintsev

Finnikov

et al. 2021

Forests

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“…The northern part of study area 1 is in the continuous permafrost zone, while its southern part and study areas 2 and 3 are in the discontinuous permafrost zone (Trofimova and Balybina, 2015). The vegetation zones include southern tundra, the forest-tundra ecotone and northern taiga (Ilyina et al, 1985), with the treeline crossing the study sites Table 1.…”

Section: Field Sitesmentioning

confidence: 99%

Fire and vegetation dynamics in northwest Siberia during the last 60 years based on high-resolution remote sensing

et al. 2021

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Abstract. The rapidly warming Arctic undergoes transitions that can influence global carbon balance. One of the key processes is the shift towards vegetation types with higher biomass underlining a stronger carbon sink. The shift is predicted by bioclimatic models based on abiotic climatic factors, but it is not always confirmed with observations. Recent studies highlight the role of disturbances in the shift. Here we use high-resolution remote sensing to study the process of transition from tundra to forest and its connection to wildfires in the 20 000 km2 area in northwest Siberia. Overall, 40 % of the study area was burned during a 60-year period. Three-quarters of the burned areas were dry tundra. About 10 % of the study area experienced two–three fires with an interval of 15–60 years suggesting a shorter fire return interval than that reported earlier for the northern areas of central Siberia (130–350 years). Based on our results, the shift in vegetation (within the 60-year period) occurred in 40 %–85 % of the burned territories. All fire-affected territories were flat; therefore no effect of topography was detected. Oppositely, in the undisturbed areas, a transition of vegetation was observed only in 6 %–15 % of the territories, characterized by steeper topographic slopes. Our results suggest a strong role of disturbances in the tree advance in northwest Siberia.

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“…Northern part of the study area 1 is in a continuous permafrost zone with permafrost temperature of approximately -3°C, while southern part and study areas 2 and 3 are in a discontinuous permafrost zone (Trofimova and Balybina, 2015). Information on the vegetation zones of the study areas are summarized in Table 3.…”

Section: General Descriptionmentioning

confidence: 99%

Fire and vegetation dynamics in North-West Siberia during the last 60 years based on high-resolution remote sensing

Sizov¹,

Ezhova²,

Tsymbarovich³

et al. 2020

Preprint

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Abstract. Rapidly warming Arctic undergoes transitions that can influence global carbon balance. One of the key processes is the shift towards plant species with higher biomass underlining a stronger carbon sink. The shift is predicted by the models based on abiotic climatic factors but it is not always confirmed with observations. Here we use high-resolution remote sensing to study the process of transition of tundra into forest on the 20 000 km2 area in North-West Siberia. Overall, 40 % of the study area was burned during 60-yr period. Three quarters of the burned areas were dry tundra. Ca 10 % of the study area experienced 2–3 fires with an interval of 15–60 years, suggesting a shorter fire return interval than that reported earlier for the northern areas of Central Siberia (130–350 years). Based on our results, the shift in vegetation (within the 60-years period) occurred in 40–85 % of the territories that experienced fires, suggesting a strong role of disturbances for the tree advance. All fire-affected territories were flat, therefore no effect of topography was detected. Oppositely, in the undisturbed areas, tundra-forest transition was observed only in 6–15 % of the territories, characterized by a steeper topographic slope. Our results show that the fires often originated near the centers of anthropogenic activity, which is continuously increasing due to the economic importance of the region. This might explain larger frequency of major fires in the northern territories of West Siberia compared to Central Siberia.

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Regionalization of the West Siberian Plain from thermal regime of soils

Cited by 12 publications

References 2 publications

Soil Temperature in Disturbed Ecosystems of Central Siberia: Remote Sensing Data and Numerical Simulation

Soil Temperature in Disturbed Ecosystems of Central Siberia: Remote Sensing Data and Numerical Simulation

Fire and vegetation dynamics in northwest Siberia during the last 60 years based on high-resolution remote sensing

Fire and vegetation dynamics in North-West Siberia during the last 60 years based on high-resolution remote sensing

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