中国气候变化蓝皮书发布，我国增暖速率高于全球平均数

Group 1 - The core viewpoint of the news is the ongoing trend of global warming and its significant impact on climate change in China, with the release of the "China Climate Change Blue Book (2025)" providing detailed monitoring data and trends [1][3][4] - The average global surface temperature in 2024 is reported to be the highest since 1850, with a notable increase in regional average temperatures in Asia, which are 1.04°C above the normal levels [3][4] - China's average surface temperature has shown a significant upward trend, increasing by 0.31°C every decade from 1961 to 2024, with 2024 marking the first year that the average temperature exceeds 1.0°C above normal [3][4] Group 2 - The concentration of major greenhouse gases continues to rise, with 2023 recording the highest levels of carbon dioxide (420.0±0.1 ppm), methane (1934±2.0 ppb), and nitrous oxide (336.9±0.1 ppb) [3][4] - Extreme weather events in China are increasing in frequency and intensity, with the climate risk index reaching its highest level since 1961 in 2024, particularly highlighting risks from flooding and high temperatures [4][5] - Global ocean warming has accelerated, with the average sea surface temperature in 2024 being 0.39°C above normal, marking the highest level since 1870 [5][6] Group 3 - The overall vegetation coverage in China has shown a stable increase, with the average normalized difference vegetation index (NDVI) rising by 8.2% compared to the average from 2001 to 2020, reaching 0.358 in 2024 [5][6] - The phenological phases of representative plant species in China are occurring earlier, with significant advancements in leafing periods observed at various monitoring stations [6]