近日，英国剑桥大学David A. Hodell团队报道了随着北半球冰川作用加剧，千年尺度气候变化开始显现。这一研究成果发表在2026年4月2日出版的《科学》杂志上。
第四纪时期（过去约258万年）的特征是北半球大型冰原的消长进退。通过研究伊比利亚海沿岸的沉积物序列，研究组证实，大约270万年前北半球冰盖的扩张伴随着冰川期内千年尺寸气候变化（MCV）的出现。
MCV在约270万年前初现端倪，伴随着一系列孤立的前兆事件，随后在约250万年前又出现了多次千年尺度的气候振荡。这些事件与北大西洋中浮冰碎屑沉积的情况相吻合，这表明海洋型冰盖发挥了重要作用。一旦形成，MCV便成为第四纪冰川气候的一个固有特征。该研究结果表明，北半球冰川作用对多时间尺度上的气候变化产生了深远影响。
附：英文原文
Title: Onset of millennial climate variability with the intensification of Northern Hemisphere glaciation
Author: David A. Hodell, Fátima Abrantes, Carlos A. Alvarez Zarikian, Timothy D. Herbert, Mengyao Du, Simon J. Crowhurst, Maryline Mleneck-Vautravers, James E. Rolfe, Xi Chen, Hannah L. Brooks, William B. Clark, Louise F. B. Dauchy-Tric, Viviane dos Santos Rocha, José-Abel Flores, Sophia K. V. Hines, Huai-Hsuan May Huang, Hisashi Ikeda, Stefanie Kaboth-Bahr, Junichiro Kuroda, Jasmin M. Link, Jerry F. McManus, Bryce A. Mitsunaga, Lucien Nana Yobo, Celeste T. Pallone, Xiaolei Pang, Marion Y. Péral, Emília Salgueiro, Saray Sanchez, Komal Verma, Jiawang Wu, Chuang Xuan, Jimin Yu, Lauren A. Haygood, Diederik Liebrand, Vitor Magalhes, Montserrat Alonso-Garcia, Mónica Duque-Castao, Fernanda Ferreira, Mafalda Freitas, Lívia Gebara Cordeiro, Isabelle Gil, María González-Martín, Ana Lopes, Cristina Lopes, Vasiliki Margari, Laura Martín-García, Lélia Matos, Aline Mega, Giulia Molina, Filipa Naughton, Dulce Oliveira, Andreia Rebotim, Teresa Rodrigues, André Santana, Raúl Trejos-Tamayo, Polychronis C. Tzedakis
Issue&Volume: 2026-04-02
Abstract: The Quaternary Period (the past 2.58 million years) was characterized by the waxing and waning of large ice sheets in the Northern Hemisphere. Using sediment sequences from the Iberian Margin, we have demonstrated that expansion of Northern Hemisphere ice sheets around 2.7 million years ago was accompanied by the emergence of millennial climate variability (MCV) during glacial periods. The onset of MCV at ~2.7 million years ago was heralded by isolated precursor events, followed by multiple millennial climate oscillations at ~2.5 million years ago. These events coincided with deposition of ice-rafted detritus in the North Atlantic, suggesting a role for marine-terminating ice sheets. Once established, MCV became an intrinsic feature of glacial climates of the Quaternary. Our findings underscore the profound impact Northern Hemisphere glaciation had on climate variability across multiple timescales.
DOI: ady7970
Source: https://www.science.org/doi/10.1126/science.ady7970