Evolution of the Asian summer monsoon during the Heinrich events 1–6

IF 4 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Global and Planetary Change Pub Date : 2025-02-01 DOI:10.1016/j.gloplacha.2024.104680

Yan-Xia Xue , Yao Wu , Chao-Jun Chen , Jun-Yun Li , Hai Cheng , Chuan-Chou Shen , Jian Zhang , Ting-Yong Li

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Abstract

There are still a series of controversies about the variation patterns and spatial differences of the Asian summer monsoon (ASM) during the Heinrich Stadials (HSs). Using stalagmite δ¹⁸O records from Yangkou Cave, Southwest China, this study revealed the climate dynamics of 6 weak ASM events corresponding to Heinrich events since the last glacial period. During the Asian Heinrich Stadial (AHS) 1–6, the ASM intensity in northern China responded rapidly to climate change in the North Atlantic, whereas the response in southern China was gradual. Ocean-atmosphere interactions under the bipolar “see-saw” mechanism dominated the ASM dynamics during the HSs. The ASM strengthening in the south of the Asian monsoon region was earlier and more gradual than in the north during the termination of the AHS, implying that the Southern Hemisphere high latitudes and tropical oceans played a critical role in the termination of millennial-scale abrupt climatic events. According to our observations, variations in moisture transport distances resulted in spatial differences in amplitude of stalagmite δ¹⁸O during the AHSs, implying that δ¹⁸O can reflect the hydrological imprint of variation in the ASM circulation.

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海因里希事件1-6期间亚洲夏季风的演变

关于海因里希冰期亚洲夏季风的变化模式和空间差异，目前还存在一系列的争议。利用阳口洞石笋δ18O记录，揭示了末次冰期以来与Heinrich事件相对应的6次弱ASM事件的气候动力学特征。在亚洲海因里希staal (AHS) 1-6期间，中国北方的ASM强度对北大西洋气候变化的响应迅速，而中国南方的响应则是渐进的。在两极“跷跷板”机制下的海洋-大气相互作用主导了高气压期间的ASM动力学。南亚季风终止过程中，南亚季风在亚洲季风区南部的增强比在亚洲季风区北部更早、更缓慢，说明南半球高纬度和热带海洋在千年尺度气候突变事件的终止过程中发挥了关键作用。水汽输送距离的变化导致ahs期间石笋δ18O振幅的空间差异，表明δ18O可以反映ASM环流变化的水文印记。

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来源期刊

Global and Planetary Change 地学天文-地球科学综合

CiteScore

7.40

自引率

10.30%

发文量

226

审稿时长

63 days

期刊介绍： The objective of the journal Global and Planetary Change is to provide a multi-disciplinary overview of the processes taking place in the Earth System and involved in planetary change over time. The journal focuses on records of the past and current state of the earth system, and future scenarios , and their link to global environmental change. Regional or process-oriented studies are welcome if they discuss global implications. Topics include, but are not limited to, changes in the dynamics and composition of the atmosphere, oceans and cryosphere, as well as climate change, sea level variation, observations/modelling of Earth processes from deep to (near-)surface and their coupling, global ecology, biogeography and the resilience/thresholds in ecosystems. Key criteria for the consideration of manuscripts are (a) the relevance for the global scientific community and/or (b) the wider implications for global scale problems, preferably combined with (c) having a significance beyond a single discipline. A clear focus on key processes associated with planetary scale change is strongly encouraged. Manuscripts can be submitted as either research contributions or as a review article. Every effort should be made towards the presentation of research outcomes in an understandable way for a broad readership.