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全球土壤加速变暖

Warming of Global Soil at an Accelerated Pace

  • 摘要: 利用ERA5-Land陆面再分析资料探究土壤温度的变化规律,发现最近几十年全球土壤温度正在加速变暖,2000~2023年的年平均变暖速率超过1980~1999年变暖速率的2倍。1980~2023年全球土壤变暖的热点地区主要呈现在北极地区、地中海—中国华北一带、非洲中北部、北美南部和南美中南部。2023年不只是陆地气温最热的一年,也是土壤温度最热的一年,2023年8~12月陆地气温和土壤温度为历史同期最热。本研究揭示出全球土壤温度正在加速变暖,对更好理解全球变暖具有重要意义。

     

    Abstract: ERA5-Land reanalysis dataset were used to explore the characteristics of soil temperature variations and the results show that the global soil temperatures have been acceleratedly warming in the last 44 years (1980−2023), and the warming rate of global soil temperature during 2000−2023 is more than twice that during 1980−1999. From 1980 to 2023, hotspots of soil temperature warming mainly appear over the Arctic, the region from Mediterranean to North China, northern and central Africa, southern North America, and southern and central South America. 2023 is not only the hottest year regarding global surface air temperature and ocean temperature, but also the hottest year for the soil. Global land air temperature and soil temperature in four layers from August to December 2023 are the hottest in the same month on record. This study reveals that global soil temperatures have been acceleratedly warming for the first time, to the best of our knowledge, and has important implications for better understanding main characteristics of global warming.

     

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