Soils of postpyrogenic larch stands in Central Siberia: Morphology, physicochemical properties, and specificity of soil organic matter

Startsev, V. V.; Дымов, А. А.; Prokushkin, Anatoly

doi:10.1134/s1064229317080117

Cited by 26 publications

(15 citation statements)

References 28 publications

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“…The set of input parameters (Tables 1 and 2) for the numerical simulation of the soil temperature regime was summarized from the data of field studies of the morphological and physical properties of soils carried out in the region [49,50,[56][57][58][59]. For instance, the effect of post-fire rapid increase in the thawing depth (by 30-100% in the first year after the fire) [34] leads to a unique path of soil evolution, when the underlying gleyed rock layers are included in soil formation for a significant period [55].…”

Section: Area Of Interest and Research Objectsmentioning

confidence: 99%

“…The set of input parameters (Tables 1 and 2) for the numerical simulation of the soil temperature regime was summarized from the data of field studies of the morphological and physical properties of soils carried out in the region [49,50,[56][57][58][59]. According to field experiments in the permafrost zone [50], "thermal inversion" is possible in different layers of cryogenic soils of disturbed plots.…”

Section: Area Of Interest and Research Objectsmentioning

confidence: 99%

“…Input parameters used for numerical simulation of the temperature regime in the soil profile. Physical characteristics of disturbed soils (post-fire and technogenic impact), summarized from the works in[49,50,[56][57][58][59].…”

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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: Area Of Interest and Research Objectsmentioning

confidence: 99%

“…The set of input parameters (Tables 1 and 2) for the numerical simulation of the soil temperature regime was summarized from the data of field studies of the morphological and physical properties of soils carried out in the region [49,50,[56][57][58][59]. According to field experiments in the permafrost zone [50], "thermal inversion" is possible in different layers of cryogenic soils of disturbed plots.…”

Section: Area Of Interest and Research Objectsmentioning

confidence: 99%

See 1 more Smart Citation

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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“…soils area characterized by a noticeable proportion of gravel with low or medium clay content (Prokushkin et al 2006) and belong to the permafrost-affected taiga soils. These soils are dominated by cryozems and podburs, as well as shallow permafrost (Startsev et al 2017).…”

Section: Siberian Sitesmentioning

confidence: 99%

Carbon dynamics in forest fire affected permafrost soils

Aaltonen¹

2020

Diss. For.

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“…Czimczik et al, 2005;De Baets et al, 2016). For example, Startsev et al (2017) observed a reduction in dissolved organic C (DOC) in organic soils from Central Siberia after a fire followed by an increase in DOC during the post-fire recovery period. In mineral soils, decreases in SOC are often observed after substantial soil heating (Badía et al, 2014;Miesel et al, 2015;Vega et al, 2013).…”

Section: Chemical Propertiesmentioning

confidence: 99%

Climate change effects on soil carbon dynamics: CO2 flux from water-repellent and fire-affected soils

Sánchez-García¹

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Climate change is increasing the frequency and intensity of droughts and this is expected to enhance the development of soil water repellency: a very common property of both dry and fire-affected soils. In some regions climate change is also increasing the occurrence and severity of wildfires. Large pulses of CO2 flux from soil to the atmosphere caused by heavy rainfall events (i.e. the Birch effect) can contribute substantially to annual C emissions from soils. However, the effect of the first rainfall after a drought on water-repellent soils and the first post-fire rainfall event on soil CO2 flux remain poorly understood. To address these knowledge gaps this research focuses on: i) investigating the effects of soil water repellency on the CO2 pulse after wetting; ii) improving understanding of the effects of vegetation fires on post-fire soil CO2 flux; and iii) studying the role of ash produced naturally during vegetation fires in post-fire soil CO2 flux. The results from this research clearly indicate that water repellency is a key controller of the CO2 pulse following the wetting of dry and fire-affected soils. Both the amount of water and the increase in soil water content after wetting are used as indicators of the magnitude of the Birch effect, but this research suggests that their application in water-repellent soils should be re-evaluated. The findings presented here challenge the conceptual notion that the Birch effect is comprised of one large pulse of CO2 and highlights the need to incorporate high-frequency observations during the period following wetting to capture the entire CO2 response to wetting. The results from this thesis suggest that ash is a key player in post-fire C fluxes and should be considered in post-fire C investigations in order to make realistic predictions of the impacts of vegetation fires on C dynamics.

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Soils of postpyrogenic larch stands in Central Siberia: Morphology, physicochemical properties, and specificity of soil organic matter

Cited by 26 publications

References 28 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

Carbon dynamics in forest fire affected permafrost soils

Climate change effects on soil carbon dynamics: CO2 flux from water-repellent and fire-affected soils

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