scholarly journals Identification of Soil Freezing and Thawing States Using SAR Polarimetry at C-Band

2014 ◽  
Vol 6 (3) ◽  
pp. 2008-2023 ◽  
Author(s):  
Thomas Jagdhuber ◽  
Julia Stockamp ◽  
Irena Hajnsek ◽  
Ralf Ludwig
Keyword(s):  
Soil Freezing ◽  
Freezing And Thawing ◽  
Soil Freezing And Thawing

A Predictive Model of the Impact of the Skidding System on Forest Soil in Severe Climatic Conditions

2020 ◽  
pp. 131-144
Author(s):  
S.E. Rudov ◽  
◽  
V.Ya. Shapiro ◽  
O.I. Grigoreva ◽  
I.V. Grigorev ◽  
...  
Keyword(s):  
Forest Soil ◽  
Warm Season ◽  
Climatic Conditions ◽  
Soil Freezing ◽  
Class Iii ◽  
Freezing And Thawing ◽  
Metal Structures ◽  
Rapid Adjustment ◽  
Soil Freezing And Thawing ◽  
The Impact

In the Russian Federation logging operations are traditionally carried out in winter. This is due to the predominance of areas with swamped and water-logged (class III and IV) soils in the forest fund, where work of forestry equipment is difficult, and sometimes impossible in the warm season. The work of logging companies in the forests of the cryolithozone, characterized by a sharply continental climate, with severe frosts in winter, is hampered by the fact that forest machines are not recommended to operate at temperatures below –40 °C due to the high probability of breaking of metal structures and hydraulic system. At the same time, in the warm season, most of the cutting areas on cryosolic soils become difficult to pass for heavy forest machines. It turns out that the convenient period for logging in the forests of the cryolithozone is quite small. This results in the need of work in the so-called off-season period, when the air temperature becomes positive, and the thawing processes of the soil top layer begin. The same applies to the logging companies not operating in the conditions of cryosolic soils, for instance, in the Leningrad, Novgorod, Pskov, Vologda regions, etc. The observed climate warming has led to a significant reduction in the sustained period of winter logging. Frequent temperature transitions around 0 °C in winter, autumn and spring necessitate to work during the off-season too, while cutting areas thaw. In bad seasonal and climatic conditions, which primarily include off-season periods in general and permafrost in particular, it is very difficult to take into account in mathematical models features of soil freezing and thawing and their effect on the destruction nature. The article shows that the development of long-term predictive models of indicators of cyclic interaction between the skidding system and forest soil in adverse climatic conditions of off-season logging operations in order to improve their reliability requires rapid adjustment of the calculated parameters based on the actual experimental data at a given step of the cycles.

scholarly journals Simulation of Soil Freezing and Thawing for Different Groundwater Table Depths

2019 ◽  
Vol 18 (1) ◽  
pp. 1-14 ◽  
Author(s):  
Junfeng Chen ◽  
Xuguang Gao ◽  
Xiuqing Zheng ◽  
Chunyan Miao ◽  
Yongbo Zhang ◽  
...  
Keyword(s):  
Groundwater Table ◽  
Soil Freezing ◽  
Freezing And Thawing ◽  
Soil Freezing And Thawing

scholarly journals GEOtop 2.0: simulating the combined energy and water balance at and below the land surface accounting for soil freezing, snow cover and terrain effects

2014 ◽  
Vol 7 (6) ◽  
pp. 2831-2857 ◽  
Author(s):  
S. Endrizzi ◽  
S. Gruber ◽  
M. Dall'Amico ◽  
R. Rigon
Keyword(s):  
Snow Cover ◽  
Land Surface ◽  
Three Dimensional ◽  
Soil Surface ◽  
Soil Freezing ◽  
Energy Budgets ◽  
Freezing And Thawing ◽  
Terrain Effects ◽  
Synthetic Simulation ◽  
Soil Freezing And Thawing

Abstract. GEOtop is a fine-scale grid-based simulator that represents the heat and water budgets at and below the soil surface. It describes the three-dimensional water flow in the soil and the energy exchange with the atmosphere, considering the radiative and turbulent fluxes. Furthermore, it reproduces the highly non-linear interactions between the water and energy balance during soil freezing and thawing, and simulates the temporal evolution of the water and energy budgets in the snow cover and their effect on soil temperature. Here, we present the core components of GEOtop 2.0 and demonstrate its functioning. Based on a synthetic simulation, we show that the interaction of processes represented in GEOtop 2.0 can result in phenomena that are significant and relevant for applications involving permafrost and seasonally frozen soils, both in high altitude and latitude regions.

scholarly journals Influence of snow cover on soil freezing and thawing in the West Spitsbergen

2015 ◽  
Vol 124 (4) ◽  
pp. 52 ◽  
Author(s):  
A. B. Shmakin ◽  
N. I. Osokin ◽  
A. V. Sosnovsky ◽  
E. P. Zazovskaya ◽  
A. V. Borzenkova
Keyword(s):  
Snow Cover ◽  
Soil Freezing ◽  
Freezing And Thawing ◽  
The West ◽  
West Spitsbergen ◽  
Soil Freezing And Thawing

Improved characterization of frozen soil processes in the Versatile Soil Moisture Budget model

2013 ◽  
Vol 93 (4) ◽  
pp. 511-531 ◽  
Author(s):  
Getachew A. Mohammed ◽  
Masaki Hayashi ◽  
Christopher R. Farrow ◽  
Yasuhide Takano
Keyword(s):  
Soil Moisture ◽  
Frozen Soil ◽  
Soil Freezing ◽  
Soil Processes ◽  
Moisture Budget ◽  
Freezing And Thawing ◽  
Budget Model ◽  
Soil Freezing And Thawing ◽  
Soil Moisture Budget

Mohammed, G. A., Hayashi, M., Farrow, C. R. and Takano, Y. 2013. Improved characterization of frozen soil processes in the Versatile Soil Moisture Budget model. Can. J. Soil Sci. 93: 511–531. Soil freezing and thawing influence the infiltration of rain and snow melt water and subsequent redistribution, runoff generation, and a host of other processes. Accurate characterization of frozen soil processes in hydrological models is important for their use in managing agricultural activities and water resources. The Versatile Soil Moisture Budget (VSMB) is a relatively simple soil water balance model, which has been widely used in Canada for several decades, but its application has primarily been for crop-growing seasons. We have modified the VSMB to include new algorithms for snow accumulation and melt, soil freezing and thawing, and snowmelt infiltration and runoff; and evaluated its performance using field data from a grassland site in Alberta. The new VSMB model simulates snow processes with reasonable accuracy and predicts the day of thawing within several days of observation. It also estimates the amount of runoff and its inter-annual variability reasonably well, although the model still has limitations in accurately predicting the vertical distribution of water content. Despite these limitations, the model will be useful for estimating the amount of snowmelt runoff that provides the critical water inputs to wetlands and dugouts, and for understanding the effects of landuse variability on these processes.

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