The path of sandstorm weather in Beijing

Beijing is one of the high incidence areas of sandstorm activities and sandstorms. The so-called sandstorm activity is a series of physical phenomena caused by strong winds acting on the dry surface. Usually, fine dust flies into the atmosphere and is in a suspended state, which is affected by the spatial movement of the atmosphere. Dust moves to tens of kilometers, hundreds of kilometers, thousands of kilometers and tens of thousands of kilometers by means of high-altitude airflow. According to the results of satellite remote sensing monitoring, dust from the Asian continent can cross the Pacific Ocean and reach the central part of the United States. Slightly larger sand grains jump on the ground, while coarse sand grains can't jump and can only roll on the ground. The movement of dust is simultaneous, which often gives people a dark feeling.