北方多雨降温，南方高温持续，温差为啥这么大？

Core Points - The recent weather in China shows a significant contrast between the north and south regions, with northern areas experiencing continuous autumn rain and a sharp drop in temperature, while southern regions are still facing high temperatures exceeding 35°C [1][2][3] - The temperature disparity is expected to persist in the coming days, with forecasts indicating rainfall in the northwest, north, and Huanghuai regions, while Jiangnan and parts of southern China will continue to experience high temperatures, with some areas reaching above 38°C [1][2] Weather Conditions - Northern regions, including central and northern China, have experienced heavy rainfall, with forecasts predicting moderate to heavy rain from October 10 to 13, particularly in the Sichuan Basin, northwest, north, and Huanghuai regions [2] - Southern regions, particularly Jiangxi, Zhejiang, Fujian, and parts of Hunan, are expected to maintain high temperatures, with some areas likely to see temperatures above 35°C, and specific regions reaching up to 38°C [2][3] Meteorological Explanation - The weather patterns are influenced by the subtropical high-pressure system, which causes clear and hot conditions in the southern regions while allowing for rainfall in the northern areas due to the interaction of cold air and warm moist air [3] - The recent temperature drop in northern regions is attributed to the strong presence of cold air and the subtropical high-pressure system, resulting in a significant decrease in average temperatures compared to historical norms, with some areas experiencing temperatures 2°C to 4°C lower than usual [3]