Spatial and temporal variability of depth and density of the snow cover in Russia

Осокин, Н. И.; Сосновский, А. В.

doi:10.15356/2076-6734-2014-4-72-80

Cited by 8 publications

(4 citation statements)

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“…During the years with maximum snow thickness, the active layer weakly freezes, causing an increase in the depth of seasonal thawing in the following summer. The same assumptions were made in studies of the regions of Western Siberia, where the maximum thickness of snow cover increased by 40% in 2001-2010 compared to 1966-2000 [41].…”

Section: Discussionmentioning

confidence: 96%

The Effect of Grazing on the Temperature Regime of the Alas Soils of Central Yakutia

Makarov

Savvinov

Gavrilieva

et al. 2020

Land

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There are numerous studies on the effect of grazing on the physical and chemical parameters of soils. However, the impact of grazing on the temperature regime of the alas soils in Central Yakutia is still poorly understood. This paper presents the results of long-term observations of the state of the soil-and-plant cover of thermokarst basins—i.e., alases—located in the Lena-Amga interfluve and actively used as pastureland. Observations of the process of the self-restoration of grass cover and changes in the temperature regime of alas soils were carried out on different variants (with isolation from grazing and without isolation). A significant increase in the average height of the grass stand and its foliage projective cover was observed with a gradual reduction in the number of species when isolated from grazing. Changes in the structure of the alas vegetation cover influence the microclimate of the soil. As a result of livestock grazing, the mean annual soil temperature rises and the amount and depth of the penetration of active temperatures increase. The most severe changes in the temperature regime occur in years with an abnormally high cover of snow. The soil warming observed during grazing undoubtedly has a favorable effect on soil organisms. However, in conditions of climate warming, grazing, especially overgrazing, can disrupt the permafrost regime and thereby provoke or intensify thermokarst phenomena.

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Section: Discussionmentioning

confidence: 96%

The Effect of Grazing on the Temperature Regime of the Alas Soils of Central Yakutia

Makarov

Savvinov

Gavrilieva

et al. 2020

Land

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“…Taking into account the results of studies on the influence of snow cover and its parameters on the soils temperature regime, a decrease in the area and in the snow cover depth has been noted over the past decades [7,18,51,52]. In our study, we analyzed the influence of the snow cover on the ALD on the studied plots.…”

Section: Discussionmentioning

confidence: 99%

Climate Change and Its Influence on the Active Layer Depth in Central Yakutia

Desyatkin

Федоров

Filippov

et al. 2020

Land

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Analysis of climatic conditions for the period of instrumental measurement in Central Yakutia showed three periods with two different mean annual air temperature (MAAT) shifts. These periods were divided into 1930–1987 (base period A), 1988–2006 (period B) and 2007–2018 (period C) timelines. The MAAT during these three periods amounted −10.3, −8.6 and −7.4 °C, respectively. Measurement of active layer depth (ALD) of permafrost pale soil under the forest (natural) and arable land (anthropogenic) were carried out during 1990–2018 period. MAAT change for this period affected an early transition of negative temperatures to positive and a later establishment of negative temperatures. Additionally, a shortening of the winter season and an extension of the duration of days with positive temperatures was found. Since the permafrost has a significant impact on soil moisture and thermal regimes, the deepening of ALD plays a negative role for studied soils. An increase in the ALD can cause thawing of underground ice and lead to degradation of the ice-rich permafrost. This thaw process causes a change of the ecological balance and leads to the destruction of natural landscapes, sometimes with a complete or prolonged loss of their biological productivity. During this observation (1990–2018 period) the active layer of permafrost is characterized by high dynamics, depending on climatic parameters such as air temperature, as well as thickness and duration of snow cover. A significant increase in ALD of forest permafrost soils—by 80 cm and 65 cm—on arable land was measured during the observation period (28 years).

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“…Weather station observations across the Russian Arctic identify negative trends in the maximum snow depth between 1966 and 2014 (Bulygina et al, 2011;Osokin and Sosnovsky, 2014). There is medium confidence in this trend because the pointwise nature of these measurements does not capture prevailing conditions across the landscape.…”

Section: Depth and Water Equivalentmentioning

confidence: 99%

Polar Regions

2022

The Ocean and Cryosphere in a Changing Climate

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While the drivers of historical decadal variability are known with medium confidence, there is currently limited evidence and low agreement concerning causes of the strong recent decrease (2016)(2017)(2018), and low confidence in the ability of current-generation climate models to reproduce and explain the observations. {3.2.1.1} Shipping activity during the Arctic summer increased over the past two decades in regions for which there is information, concurrent with reductions in sea ice extent (high confidence). Transit times across the Northern Sea Route have shortened due to lighter ice conditions, and while long-term, pan-Arctic datasets are incomplete, the distance travelled by ships in Arctic Canada nearly tripled during 1990-2015 (high confidence). Greater levels of Arctic ship-based transportation and tourism have socioeconomic and political implications for global trade, northern nations, and economies linked to traditional shipping corridors; they will also exacerbate region specific risks for marine ecosystems and coastal communities if further action to develop and adequately implement regulations does not keep pace with increased shipping (high confidence).

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Spatial and temporal variability of depth and density of the snow cover in Russia

Cited by 8 publications

References 1 publication

The Effect of Grazing on the Temperature Regime of the Alas Soils of Central Yakutia

The Effect of Grazing on the Temperature Regime of the Alas Soils of Central Yakutia

Climate Change and Its Influence on the Active Layer Depth in Central Yakutia

Polar Regions

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