Pre‐Industrial (1750–1850 CE) Cold Season Warmth in Northeastern China
Pre‐Industrial (1750–1850 CE) Cold Season Warmth in Northeastern China
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DOI：
10.1029/2023gl103591
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发表时间：
2023-05
影响因子：
5.2
通讯作者：
Y. Yao;Lu Wang;Yongsong Huang;Jie Liang;R. Vachula;Yanjun Cai;Hai Cheng
中科院分区：
文献类型：
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作者：
Y. Yao;Lu Wang;Yongsong Huang;Jie Liang;R. Vachula;Yanjun Cai;Hai Cheng
与全球变暖的预测相反，在过去几十年中，中纬度北部大陆遭受异常寒冷冬季的频率增加。然而，缺乏中纬度地区较长期的冷季温度记录阻碍了我们对这种温度变率的强迫机制的理解。在此，我们报告了中国东北鹿鸣湖的第一组烯烃高分辨率冷季温度记录，记录时间可追溯到前工业时代（自公元1700年以来）。通过与该地区的仪器记录和历史记录进行比较，我们验证了第一类烯酮作为寒冷季节温度变化记录者的高效率。我们的记录显示，相对于人为的工业时期（自1850年以来），1750年至1850年的工业化前变暖在很大程度上是由北极涛动的变率驱动的，人为的温室气体强迫的贡献可以忽略不计。我们的研究结果强调了大气内部环流在驱动中国东北寒冷季节气温中的重要性。
Contrary to global warming projections, northern mid‐latitude continents have suffered from an increased frequency of unusually cold winters during the last few decades. However, a lack of longer‐term cold‐season temperature records from mid‐latitudes hampers our understanding of the forcing mechanisms of this temperature variability. Here we report a Group 1 alkenone‐based high‐resolution record of cold‐season temperatures extending to the pre‐industrial era (since 1700 CE) from Lake Luming in northeastern China. By comparing with the instrumental and historical records in the region, we verify the high efficacy of Group 1 alkenones as recorders of cold‐season temperature variability. Our record shows pre‐industrial warmth between 1750 and 1850 CE relative to anthropogenic industrial period (since 1850 CE), which is largely driven by variability of the Arctic Oscillation, with a negligible contribution from anthropogenic greenhouse‐gas forcing. Our results highlight the importance of internal atmospheric circulation in driving cold‐season temperatures in northeastern China.