中央气象台：华北中南部黄淮中西部等地大气扩散条件转差

Core Viewpoint - The air diffusion conditions in central and southern North China and central and western Huanghuai are deteriorating from the 26th to the 28th, with light to moderate haze expected in some areas. However, starting from the night of the 28th, the haze will gradually weaken or dissipate due to the influence of cold air [1][2][4]. Group 1: Regional Air Quality Forecasts - In the Beijing-Tianjin-Hebei region, air diffusion conditions will worsen from the 26th to the 28th, leading to light to moderate haze in some areas. The haze will start to dissipate from the night of the 28th due to cold air [2]. - The Yangtze River Delta region will experience good air diffusion conditions from the night of the 25th to the 26th, with no significant haze. However, from the 27th to the 29th, the northern part will have general diffusion conditions with light haze in some areas [3]. - In the Fenwei Plain, air diffusion conditions will gradually deteriorate from the 26th to the 27th, with light haze in some areas. The haze will weaken or dissipate starting from the daytime of the 28th due to cold air [4]. - The Central China region will have good air diffusion conditions from the night of the 25th to the 26th, with no significant haze. From the 27th to the 29th, general conditions will lead to light haze in some areas [5]. - The Pearl River Delta region is expected to have good air diffusion conditions for the upcoming week, with no significant haze [6]. - In the Southwest region, most areas will have good air diffusion conditions, but light haze may occur in the central and southern parts of the Sichuan Basin during cold air intervals [7]. - The Northeast region will also have good air diffusion conditions for most of the week, with light haze in some areas like central Liaoning and southern Heilongjiang during cold air intervals [8]. - The Northwest region will experience good air diffusion conditions overall, but light to moderate haze is expected in some areas of the northern Tianshan Mountains and dust or floating dust weather in parts of the southern Xinjiang basin [9].