京津冀及周边地区将出现空气污染过程

Core Viewpoint - The Beijing-Tianjin-Hebei region and surrounding areas are expected to experience an air pollution event from November 4 to 8, with peak pollution levels potentially reaching moderate to heavy pollution [1] Group 1: Air Quality Forecast - The first PM2.5 pollution event of the autumn-winter season ended on November 2, leading to improved air quality [1] - As of November 4, the hourly PM2.5 concentration peaked at 128 micrograms per cubic meter [1] Group 2: Meteorological Conditions - The overall weak cold air activity and higher-than-normal temperatures in late October to early November are unfavorable for pollution dispersion, contributing to frequent pollution events [1] - From November 4 to 5, adverse atmospheric diffusion conditions are expected to worsen, with November 6 predicted to be the most unfavorable day for air quality [1] Group 3: Emission Levels - Increased operational rates in industries such as cement, brick, and ceramics, along with a rise in heavy truck traffic, are contributing to elevated emission levels [2] - The ongoing testing and ignition of heating equipment, along with numerous open burning sites, are further raising regional emissions [2] Group 4: Pollution Severity - From November 4 to 5, light to moderate pollution is anticipated in the central and southern parts of the region, while from November 6 to 8, slight improvements in diffusion conditions may lead to good air quality in the northern areas, with light to moderate pollution persisting in the central and southern regions [2] - Heavy pollution is likely in cities in southern Hebei and northeastern Henan on November 6 [2]