China News Agency Beijing, January 4(Reporter Ruan Yulin) from 2 to 3, affected by adverse weather conditions, China has a wide range of (fine particulate matter) pollution. On the 4th, the area of heavy pollution continued to expand.
On the evening of the second day, due to the adverse weather conditions such as calm and stability, high humidity and inverse temperature, the central and Guanzhong regions of Liaoning took the lead in heavy hourly pollution.
Monitoring showed that as of 1700 hours on January 3,68 of the country's 337 prefecture-level and above cities had severe hourly concentrations of pollution,10 cities had severe hourly concentrations of pollution and a peak hourly concentration of 365 micrograms per cubic meter.
Feng Yinchang, director of the National Key Laboratory for the Prevention and Control of Air Particulate Matter Pollution in Urban Areas of Environmental Protection and Professor of the School of Environmental Science and Engineering at Nankai University, believes that first, the weak diffusion capacity of the atmosphere leads to the continuous accumulation of pollutants, and second, the high relative humidity, which leads to the rapid transformation of gaseous pollutants. The relative humidity in the central and eastern regions of the country, Shaanxi Guanzhong, Sichuan Basin, central Inner Mongolia, the northern part of Ningxia and the northwest of Xinjiang is higher than 60%, and the local area is close to saturation and heavy fog occurs, which promotes the secondary transformation of gaseous pollutants.
In response to this pollution process, all localities issued early warning information on heavy pollution weather and started emergency response, Beijing-Tianjin-Hebei and surrounding areas, Fen-Wei Plain, Northeast region,53 cities started orange warning,16 cities started yellow warning. Emergency emission reduction measures mainly include industrial enterprises emergency control, prohibit the transportation of high-emission vehicles and so on.
China's Environmental Monitoring Station expects that from April to June, the proliferation conditions will be unfavorable, with severe and above pollution occurring in the central and southern parts of Beijing, Tianjin and Hebei, in the western part of Shandong and in the northern part of Henan. Among them,4 days, Beijing-Tianjin-Hebei region northern pollution has been alleviated. Due to poor diffusion conditions, most of Fenwei Plain area is moderate to severe pollution. (end)