2024年全球大气二氧化碳浓度创新高

Core Insights - The World Meteorological Organization (WMO) reports a significant increase in global atmospheric CO2 concentration, reaching a record high of 423.9 ppm in 2024, an increase of 3.5 ppm from 2023 [1] - The report indicates a continuing acceleration in the annual growth rate of atmospheric CO2, which has quadrupled since the 1960s [1] - The last time CO2 levels were similar to current concentrations was 3 to 5 million years ago, before the emergence of humans [1] Group 1 - The three main causes for the sharp increase in CO2 concentration are ongoing fossil fuel emissions, rampant wildfires releasing large amounts of CO2, and a weakened carbon absorption capacity of global land and oceans [1] - Despite international calls for emissions reduction, fossil fuel emissions remain high, highlighting the urgent need to curb fossil fuel use [1] - The 2024 El Niño phenomenon is expected to exacerbate global temperatures and trigger extreme weather events, further impacting carbon absorption capabilities in critical regions like the Amazon [1] Group 2 - The WMO warns that excessive CO2 will continue to contribute to warming effects on Earth for centuries, leading to more frequent extreme weather events [2]