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Abstract
Wind erosion is largely controlled by climate conditions. In this study, we examined the influences of changes in wind speed, soil wetness, snow cover, and vegetation cover related to climate change on wind erosion in northern China during 1981–2016. We used the wind erosion force, defined as wind factor in the Revised Wind Erosion Equation Model, to describe the effect of wind speed on wind erosion. The results show that wind erosion force presented a long-term decreasing trend in the southern Northwest, northern Northwest, and eastern northern China during 1981–2016. In the Gobi Desert, the wind erosion force presented for 1981–1992 a decreasing trend, for 1992–2012 an increasing trend, and thereafter a weakly decreasing trend. In comparison to wind speed, soil wetness and snow cover had weaker influences on wind erosion in northern China, while vegetation cover played a significant role in the decrease of wind erosion in the eastern northern China during 1982–2015.
Highlights
Wind erosion occurs in arid and semiarid areas in China, which cover approximately 165.59 9 104 km2 and constitute 17.25% of the national territory (Shi et al 2004; China 2013)
We examined the influences of changes in wind speed, soil wetness, snow cover, and vegetation cover related to climate change on wind erosion in northern China during 1981–2016
The results show that wind erosion force presented a long-term decreasing trend in the southern Northwest, northern Northwest, and eastern northern China during 1981–2016
Summary
Wind erosion occurs in arid and semiarid areas in China, which cover approximately 165.59 9 104 km and constitute 17.25% of the national territory (Shi et al 2004; China 2013). Yang and Lu (2016) and Han (2019) used wind erosion climatic erosivity, indicated as a revised C factor from the Food and Agriculture Organization (FAO) of the United Nations (1979), to assess the effects of wind speed and soil wetness on wind erosion in northern China. These sources reported decreased wind erosion climatic erosivity and wind erosion in northern China during 1961–2012. Changes in vegetation cover caused by human activities and natural climate change exerted influences on wind erosion in northern China (Huang et al 2018; Zhang et al 2018; Chi et al 2019; Wu et al 2019; Zhao et al 2020)
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