China News Service, June 3, according to the official Weibo news of the Beijing Environmental Protection Monitoring Center, it is expected that during the day, sand and dust storms in central and eastern Mongolia will affect most parts of Beijing, and the peak PM10 concentration can reach a serious pollution level.
During the day on the 2nd, due to the impact of the rear of the Mongolian cyclone, there was a sandstorm in the central and eastern part of Mongolia. The raised sand and dust transported from north to south at high altitude, affecting the central Inner Mongolia and the northwest of Hebei on the night of the 2nd. When the concentration exceeds 1000 μg/m3, the sand and dust move slowly and strongly.
Under the action of the northwest airflow, sand and dust began to affect Beijing at 5:00 on the 3rd. PM10 concentration at some PM10 sites exceeded 500 micrograms/cubic meter; it is expected that during the day, this dust will affect most parts of the city from west to east, with peak concentration Can reach a serious pollution level. At 8 o'clock today, PM10 concentration in the 6th district of the city was 349; northwest: 543; northeast: 163; southeast: 222; southwest: 453.
Due to the weak pressure field during the day and the slow movement of sand and dust, PM10 will still maintain a high concentration. Tonight, with the continued effect of high pressure and northerly wind, the impact of the sand and dust pollution process on Beijing has ended.