近日，法国布雷斯特大学Samuel Toucanne团队研究了海因里希冰期中纬度冰团的同步双极后退。相关论文于2026年1月6日发表在《自然—地球科学》杂志上。

在极地冰芯中发现的千年尺度气候变化，在大约7万至1.5万年前的末次冰期期间表现出南北半球温度的异步性。这种两极跷跷板模式在海因里希期（Heinrich Stadials）最为明显，海因里希期对应于北大西洋地区在大西洋环流减弱后反复出现的严重降温事件。然而，在最近的海因里希期，中纬度冰盖和冰川在两个半球都表现出类似的波动，这使得学界对南北半球间遥相关联的理解变得复杂。

研究组通过对新西兰南岛近海沉积的冰川成因沉积物进行分析，提供了末次冰期新西兰冰川波动的连续千年尺度记录。结果发现，新西兰千年尺度的冰川退缩发生在海因里希期，这与从浮游有孔虫组合推断出的南太平洋副热带锋面南移相吻合，并且很可能（如果不是非常可能的话）与北美和欧洲冰盖融水和冰山产量增加（在1至2千年内）同步。这些发现表明，中纬度冰体的全球退缩是海因里希期的一个持续特征，其驱动因素可能是全球能量增益，而南半球则因大西洋环流减弱导致的热量累积而持续。

附：英文原文

Title: Synchronous bipolar retreat of mid-latitude ice masses during Heinrich Stadials

Author: Toucanne, Samuel, Vzquez Riveiros, Natalia, Soulet, Guillaume, Blard, Pierre-Henri, Migeon, Amandine, Rigalleau, Vincent, Roubi, Angelique, Cheron, Sandrine, Boissier, Audrey, Menviel, Laurie, Bostock, Helen

Issue&Volume: 2026-01-06

Abstract: Millennial-scale climate variability in polar ice cores exhibits interhemispheric temperature asynchronicity during the last glacial period, approximately 70,000 to 15,000 years ago. This bipolar seesaw pattern is most pronounced during Heinrich Stadials, which correspond to recurring severe cooling episodes in the North Atlantic region following a weakening of the Atlantic overturning circulation. However, mid-latitude ice sheets and glaciers displayed similar fluctuations in both hemispheres during the most recent Heinrich Stadials, complicating our understanding of interhemispheric teleconnections. Here we provide a continuous millennial-scale record of New Zealand glacier fluctuations over the last glacial period, through the analysis of glaciogenic sediments deposited offshore South Island. We find that millennial-scale glacial retreats in New Zealand occurred during Heinrich Stadials, coinciding with a southerly shift of the South Pacific Subtropical Front inferred from planktic foraminiferal assemblages, and were probably—if not very probably—synchronous (within 1–2kyr) with enhanced meltwater and iceberg production from the North American and European ice sheets. These findings demonstrate that global retreat of mid-latitude ice masses is a persistent feature of Heinrich Stadials, possibly driven by global energy gain and sustained in the Southern Hemisphere by heat accumulation resulting from the weak Atlantic overturning circulation.

DOI: 10.1038/s41561-025-01887-x

Source: https://www.nature.com/articles/s41561-025-01887-x