What season is the most prone to dust weather on the Loess Plateau?

The Loess Plateau is in the transition zone from temperate monsoon climate to temperate continental climate, and most areas belong to temperate continental monsoon climate, with large annual temperature difference and diurnal range, and precipitation gradually decreases from east to west, with occasional heavy rain in summer and cold and dry in winter.

The most prone season of sand blowing weather on the Loess Plateau is mainly spring, with more in April.

The main reasons are as follows:

1. The rainy season has not yet arrived, and there is little rain, which does not increase the soil water content like the melting of snow and ice in the northeast.

2. The temperature is abnormally high. Under the background of global warming, the northern part of China has been warmer since the middle and late 1980s, especially since 1 997, the annual average temperature is about 0.5 ~ 1.5℃ higher. From the end of March to the beginning of April, the highest temperature in central and eastern China approached or exceeded the historical extreme value in the same period.

From March to April, windy weather is frequent. With the rapid rise of temperature in spring, evaporation is vigorous. After thawing, the soil moisture content is low, and the soil is dry and loose, which provides rich dust conditions for the formation of dust weather. In addition, the vegetation has not been restored, and dusty weather is prone to occur under the action of strong winds.