Core Insights - The World Meteorological Organization (WMO) reported that atmospheric carbon dioxide levels are set to reach a historic high in 2024, exacerbating global warming issues [1] - Human activities, including ongoing carbon dioxide emissions and frequent wildfires, are identified as primary contributors to this phenomenon, alongside a reduction in carbon sinks such as terrestrial ecosystems and oceans [1] - From 2023 to 2024, the global average carbon dioxide concentration surged by 3.5 ppm, marking the largest increase since modern measurements began in 1957. Methane and nitrous oxide levels have also reached record highs [1]

Group 1 - The core viewpoint indicates that 2025 is likely to be one of the warmest years on record, with a high probability of exceeding the global average temperature record set in 2024 [1][2] - The World Meteorological Organization (WMO) predicts that there is an 80% chance that at least one year between 2025 and 2029 will surpass the 2024 temperature record [1] - The average global temperature from January to May 2025 is reported to be the second highest since 1850, only slightly lower than the same period in 2024 [1] Group 2 - In June 2023, the national average temperature in China was 21.1°C, which is 0.9°C higher than the historical average, tying with 2022 for the highest June temperature since 1961 [2] - A total of 102 national meteorological stations in China recorded daily maximum temperatures exceeding historical June records, with 17 stations reaching or exceeding 40°C [2] - Two significant heatwaves affected China in June, with temperatures exceeding 40°C in several provinces [2] Group 3 - National precipitation in June showed an "east more, west less" distribution, with an average of 85.8 mm, which is 3.4% higher than the historical average [3] - Three strong regional rainstorm events occurred in southern China, with one event classified as extremely strong, leading to severe flooding in multiple areas [3] - The "China Climate Change Blue Book (2025)" highlights the ongoing warming trend in the climate system, with significant acceleration in ocean warming, sea level rise, and glacier melting since the 1990s [3] Group 4 - The National Climate Center will continue to enhance global climate system monitoring and provide timely and accurate information to support responses to global climate change [4]