China News Service, Beijing, May 16th (Chen Hang) A reporter learned from the Beijing Environmental Protection Monitoring Center that in the afternoon of the 16th, sand and dust will advance from northwest to southeast, affecting Beijing in a comprehensive way. It is expected that the intensity and the affected area of this sand and dust process will be relatively large, and the PM10 concentration in Beijing can reach above the severe pollution level in a short time. The sand and dust process will continue into the evening, from the evening of the 16th to the early morning of the 17th, the sand and dust will gradually move out, and the air quality in Beijing will improve.
Remote-sensing monitoring showed that a large area of desertification occurred at the junction of northern Inner Mongolia and Mongolia at night on the 15th. The main body of sand and dust gradually moved eastward and southward with the rear of the low-pressure system, and its forward has now affected the Zhangjiakou area in northwestern Beijing, causing the PM10 concentration to climb rapidly. In the afternoon today, Beijing will gradually enter the rear of the low-pressure system, and the ground will be turned to northerly airflow control.
At present, Beijing is controlled by the bottom of the low-pressure system, basically in a quiet wind state, with high humidity, reaching about 80%, and the general situation of pollutant diffusion. Monitoring data shows that the PM2.5 concentration level in Beijing is slightly higher than that at night, and it is currently at a good level. (Finish)