“热穹顶”笼罩，北半球热晕了

Core Points - The "heat dome" phenomenon is currently affecting millions in the Northern Hemisphere, particularly in Europe and the United States, leading to dangerously high temperatures [1][2] - Climate scientists report that the intensity and duration of such extreme atmospheric events have nearly doubled since the 1950s [1] - The UK experienced its hottest June on record, with temperatures in London expected to reach 35°C, while parts of the US saw temperatures exceed 40°C [1][4] Group 1 - The "heat dome" is characterized by high-pressure systems that trap hot air in a region, preventing cooler air from entering, resulting in heat waves [1][2] - In Europe, countries like Greece, Spain, and France are facing unprecedented heat, with temperatures deviating from seasonal averages by 10°C to 14°C [2] - The phenomenon is linked to human-induced climate change, which has increased greenhouse gas levels, making it harder for the Earth to release excess heat [2][10] Group 2 - Research indicates that the frequency of atmospheric blocking events, which lead to heat waves, wildfires, and floods, has increased significantly over the past 70 years [8] - The current "double heat dome" phenomenon is associated with persistent fluctuations in jet streams, which are not fully captured by existing climate models [10] - Experts warn that typical summer weather patterns are becoming a thing of the past, with extreme temperature and precipitation events becoming the norm [10]