北半球夏季提前进入“炙烤模式”，会带来哪些经济影响|树线图

Group 1: Climate Change and Heatwaves - The current heatwave in the Northern Hemisphere is linked to a persistent high-pressure system known as the "heat dome," which traps warm air near the surface, resulting in prolonged hot, clear, and dry weather [1][5] - June 2025 was recorded as the third hottest June globally since records began, with an average surface temperature of 16.46 degrees Celsius, 0.47 degrees Celsius higher than the average from 1991 to 2020 [2] - The World Meteorological Organization (WMO) warns that there is an 80% probability of experiencing the warmest years between 2025 and 2029, with a 86% chance of global warming exceeding 1.5 degrees Celsius above pre-industrial levels [2] Group 2: Regional Impacts and Trends - The frequency and intensity of extreme heat events in Europe are increasing, with projections indicating that by 2050, about half of the European population may face high heat stress risks during summer [3] - Since 1950, over two-thirds of extreme heat events in Europe have occurred after 2000, with a notable increase in "tropical nights," where nighttime temperatures remain above 25 degrees Celsius [3] Group 3: Economic Implications - The extreme heat is expected to slow global economic growth by 0.6 percentage points this year, with one day of extreme heat (temperatures exceeding 32 degrees Celsius) equating to half a day of work stoppage [10] - The International Energy Agency reported a 0.8% increase in CO2 emissions related to energy in 2024, reaching a record 3.78 billion tons, contributing to a rise in atmospheric CO2 concentration to 422.5 PPM, which is 50% above pre-industrial levels [7] Group 4: Global Response and Cooperation - The WMO emphasizes the need for enhanced international cooperation to address climate challenges, including the establishment of global early warning systems, as only 50% of countries currently have multi-hazard early warning systems [10] - Increased financing support from international financial institutions and climate funds is crucial for climate change mitigation efforts, particularly for vulnerable populations in developing countries [10]