西北地区有沙尘天气

Group 1 - The article discusses the impact of cold air and strong winds on weather conditions across various regions in China, predicting dust storms and sandstorms in specific areas [1][11] - A blue alert for sandstorms was issued by the Central Meteorological Observatory, indicating severe weather conditions expected from February 9 to February 10 [1][11] - Air quality conditions are expected to vary across regions, with some areas experiencing light to moderate haze due to atmospheric diffusion conditions [3][4][5] Group 2 - In the Beijing-Tianjin-Hebei region, light haze is expected on February 9, with moderate haze in some areas, improving slightly on February 10 due to weak cold air [4] - The Yangtze River Delta region will see generally good atmospheric diffusion and wet removal conditions, although intermittent light haze may occur in northern Jiangsu and Anhui [5] - The Pearl River Delta region is forecasted to have good atmospheric diffusion conditions with no significant haze expected [8]