Abstract
As an important type of soil erosion, freeze-thaw erosion occurs primarily at high latitude and altitude. The overview on the effect of freeze-thaw on soil erosion was provided. Soil erosion was affected by freeze-thaw processes, as thawing and water erosion reinforce each other. Remote sensing provided an unprecedented approach for characterizing the timing, magnitude, and patterns of large-scale freeze-thaw and soil erosion changes. Furthermore, the essence of soil freeze-thaw was the freeze and thaw of soil moisture in the pores of soil. Freeze-thaw action mainly increased soil erodibility and made it more vulnerable to erosion by destroying soil structure, changing soil water content, bulk density, shear strength and aggregate stability, etc. However, the type and magnitude of changes of soil properties have been related to soil texture, water content, experimental conditions and the degree of exposure to freeze-thaw. The use of indoor and field experiments to further reveal the effect of freeze-thaw on soil erosion would facilitate improved forecasting, as well as prevention of soil erosion during thawing in regions with freeze-thaw cycles.
Highlights
As the world seeks to achieve the Sustainable Development Goals related to food, health, water and climate, soils are under enormous pressure [1,2]
In order to reduce the difficulty of experimental control, indoor freeze-thaw simulation method was mainly used to study the effects of freeze-thaw action on soil physical and chemical properties and erosion process [17,18,19]
Barnes et al [23] used erosion needle method to monitor the impact of freeze-thaw action on clay gully erosion for a long time in the field and found that freeze-thaw action would significantly increase the amount of erosion in gullies, especially the lateral walls
Summary
As the world seeks to achieve the Sustainable Development Goals related to food, health, water and climate, soils are under enormous pressure [1,2]. Soil erosion occurred in areas where intense interactions among strata at the surface of land and environmental factors interact including water, wind, freeze-thaw, gravity, etc. The freezing date of the permafrost in the seasonal freeze-thaw area was delayed, while the thawing date was generally advanced [13]. This trend had a significant impact on the surface environment, that is, the thawing depth of permafrost increased, water moved to the deep soil layer, and the living environment and soil properties of the surface vegetation changed [14]
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