7名中国游客沉入贝加尔湖溺亡，原因与天气回暖有关

Group 1 - The incident involving the drowning of seven Chinese tourists occurred on the melting ice surface of Lake Baikal, which is characterized by complex underwater topography and currents [1] - The current rapid warming trend has led to partial melting and instability of the ice surface, with temperatures in the region significantly exceeding normal levels, such as Irkutsk reaching 13.8°C, which is about 25°C higher than the average for February [5] - The combination of strong southern winds bringing warm air and the deep, cold waters of the lake creates conditions where heavy vehicles can easily fall through weak ice areas, leading to rapid loss of body heat for anyone who falls in [5]