2025年中国近海热含量偏高

Core Insights - The ocean heat content in China's coastal waters is significantly higher than the historical average, with the South China Sea reaching a record high, indicating a concerning trend in marine conditions [1][2] - The increase in sea temperature and heat content has led to a rise in the frequency of marine disasters, including typhoons and storm surges, impacting coastal regions [2] Group 1: Ocean Heat Content - In 2025, the ocean heat content in China's coastal waters is notably elevated, with the South China Sea exceeding the historical peak by 2.02 ZJ (1 ZJ = 1×10^21 joules) [1] - The heat content in the Bohai Sea and northern Yellow Sea, southern Yellow Sea, and East China Sea is higher than the historical average by 11 EJ, 33 EJ, and 169 EJ respectively, indicating a warming trend across all regions [1] Group 2: Sea Surface Temperature - The average sea surface temperature in China's coastal waters for 2025 is projected to be 21.05 degrees Celsius, which is 0.76 degrees Celsius higher than the historical average, despite being 0.45 degrees Celsius lower than in 2024 [1] - The Bohai Sea and northern Yellow Sea show the most significant warming, with temperatures 0.9 degrees Celsius above the historical average, while the southern Yellow Sea, East China Sea, and South China Sea are higher by 0.81 degrees Celsius, 0.75 degrees Celsius, and 0.58 degrees Celsius respectively [1] Group 3: Impact of Ocean Warming - Ocean warming is linked to an increase in extreme weather events, such as intensified typhoons and marine heatwaves, posing risks to life and property [2] - In 2025, there were 19 storm surge events along China's coast, exceeding the ten-year average of 15, with 10 of these being classified as disastrous, also above the ten-year average of 7.1 [2] - The direct economic losses from marine disasters in 2025 were significantly higher than the ten-year average, highlighting the growing impact of ocean warming on coastal economies [2] Group 4: Monitoring and Forecasting - The National Marine Environmental Forecasting Center will continue to monitor the abnormal changes in nearshore sea temperature and heat content, providing timely updates and warnings to support disaster prevention and marine economic development [2]