In the spring of 2010, sandstorms occurred in northwest my country. Please explain the reasons from two aspects: climate and vegetation.

Climate: Northwest my country has a temperate continental climate, with large temperature differences between winter and summer and little precipitation throughout the year. In spring, the temperature rises rapidly, and a lot of water vapor is taken away during the evaporation process, making the surface drier. And in the northwest region, controlled by the subtropical high and westerly winds, the wind is strong and it is very easy to form dusty weather. When the wind reaches a certain level, dust accumulates, forming a sandstorm.

Vegetation: Due to climate factors, northwest my country has little precipitation, strong sunlight, and high heat. Therefore, the vegetation coverage rate is extremely small and the land desertification is serious. Vegetation has the function of windproof and sand-fixing. However, in northwest my country, vegetation is sparse and soil desertification is severe, making sandstorms easy to form.

The dust storm in the spring of 2010 was caused by the influence of strong cold air masses in Siberia.