中国科学院地质与地球物理研究所Zeyang Zhu团队报道了中国东北海因里希—斯塔迪尔事件1期间的夏季变暖。相关论文发表在2024年2月26日出版的《地质学》杂志上。

研究对中国东北部小型火山湖Kielguo湖沉积物序列的细菌支链甘油二烷基甘油四醚(brGDGTs)进行了定量重建。结果表明：在约ca. 20-18.2校准(cal.)k.y.B.P.间隔期，夏季气温最低，为11.1℃，在海因里希—斯塔迪尔事件1(HS1)期间增加了约1.9℃，在向Boling-Allerod（B-A）过渡期间增加了约2.7℃。

B-A暖期和新仙女木冷间隔期的夏季气温分别为14.1°C和12.0°C。Kielguo湖沉积物序列的夏季温度记录表明，夏季变暖主导了HS1期间东亚地区的气候变化状态，与北大西洋和格陵兰地区冬季温度控制的变冷模式不同。这一区别可以解释为大西洋经向翻转环流的崩溃在传播到东亚时，引发的冬季冷却信号减弱，以及HS1期间东亚地区由轨道和温室气体控制的夏季温度升高。

据悉，末次消冰期以多次千年尺度的气候突变事件为特征，被认为是探索温度变化潜在动力的关键时期。然而，中国东北（NE）覆盖末次冰消期的定量温度记录数量有限，阻碍了人们对该地区温度变化机制和过程的全面认识。

附：英文原文

Title: Summer warming during Heinrich Stadial 1 in Northeast China

Author: Zeyang Zhu, Jing Wu, Guoqiang Chu, Patrick Rioual, Jiaxin Lu, Luo Wang, Jiaqi Liu

Issue&Volume: 2024-02-26

Abstract: The last deglaciation is considered a key period for exploring the underlying dynamics of temperature changes because it was characterized by multiple millennial-scale abrupt climatic events. However, the limited number of quantitative temperature records in Northeast (NE) China covering the last deglaciation hampers a complete understanding of the mechanisms and processes behind the temperature changes that occurred in that region. Here, we present a quantitative reconstruction of summer temperature over the last deglaciation based on bacterial branched glycerol dialkyl glycerol tetraethers (brGDGTs) analyzed from the sediment sequence of Lake Kielguo, a small volcanic lake in NE China. The results show that summer temperature was lowest during the interval ca. 20-18.2 calibrated (cal.) k.y. B.P. with a value of ～11.1 °C and increased by ～1.9 °C during Heinrich Stadial 1 (HS1) and by ～2.7 °C during the transition to the Blling-Allerd (B-A). The summer temperatures during the B-A warm interval and Younger Dryas cold interval were ～14.1 °C and ～12.0 °C, respectively. The summer temperature record from the Lake Kielguo sediment sequence indicates that summer warming dominated the climate change state during HS1 in East Asia, which is different from the cooling pattern controlled by winter temperatures in the North Atlantic and Greenland realms. This distinction can be explained by weakened winter cooling signals triggered by the collapse of Atlantic Meridional Overturning Circulation when these signals propagated to East Asia, and increased summer temperature warming controlled by orbital and greenhouse gases during HS1 in East Asia.

DOI: 10.1130/G51881.1

Source: https://pubs.geoscienceworld.org/gsa/geology/article/doi/10.1130/G51881.1/635594/Summer-warming-during-Heinrich-Stadial-1-in