强劲寒潮来袭，“幕后推手”是西伯利亚强冷气团

Core Viewpoint - A significant cold wave is affecting a large part of China, bringing extreme low temperatures, rain, snow, and ice, with the China Meteorological Administration issuing multiple weather warnings and emergency responses [1][2]. Group 1: Weather Impact - The cold wave has led to a drastic drop in temperatures, particularly in southern regions, with some areas experiencing freezing rain [1]. - The cold air mass from Siberia is responsible for this cold wave, which is characterized by a broad impact area, prolonged duration, and significant temperature drops [1][2]. - The central and eastern parts of China will experience extensive rain and snow, with specific regions like Hubei, Anhui, Jiangxi, Hunan, and Guizhou facing freezing rain lasting 2 to 3 days, accumulating between 5 to 10 millimeters [2]. Group 2: Mechanism of Freezing Rain - The formation of freezing rain is linked to a temperature inversion where warm air exists above cold air, causing ice crystals to melt into supercooled water droplets that freeze upon contact with surfaces [2]. - Many affected areas have low cloud layers, resulting in freezing rain primarily from supercooled droplets rather than ice crystals [2]. Group 3: Risks and Precautions - The combination of low temperatures and freezing rain poses risks such as road icing, damage to electrical and communication infrastructure, and agricultural harm [3]. - Public safety measures are advised, including precautions against slipping and freezing, as well as ensuring proper warmth during outdoor activities [3].