Contrasting Responses of Monsoon Rainfall and Speleothem Oxygen Isotope Between Northeast Asia and North China During the Early‐Mid Holocene

Wang, Kexin ORCID: https://orcid.org/0000-0003-1453-6976; Zhao, Jingyao ORCID: https://orcid.org/0000-0002-4252-6540; Cai, Yanjun ORCID: https://orcid.org/0000-0001-7063-5050; Zhang, Haiwei ORCID: https://orcid.org/0000-0002-0855-1283; Li, Hanying ORCID: https://orcid.org/0000-0002-7915-9828; Zhang, Xu ORCID: https://orcid.org/0000-0003-1833-9689; Zhang, Xiaojian ORCID: https://orcid.org/0000-0001-9757-3101; Wang, Jian; Gorbarenko, Sergey A. ORCID: https://orcid.org/0000-0001-8864-0499; Bersenev, Yuriy I.; Vasilenko, Yuriy P. ORCID: https://orcid.org/0000-0002-2067-8869; Cheng, Hai ORCID: https://orcid.org/0000-0002-7901-4522. 2025 Contrasting Responses of Monsoon Rainfall and Speleothem Oxygen Isotope Between Northeast Asia and North China During the Early‐Mid Holocene. Geophysical Research Letters, 52 (20), e2025GL114717. 13, pp. 10.1029/2025GL114717

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Abstract/Summary

A critical gap in East Asian summer monsoon research is the lack of speleothem records from its northeasternmost fringe, hindering tests of orbital-scale monsoon variability at higher latitudes. Our new records from the Russian Far East, spanning 9–5 ka BP, fill this spatial gap and reveal a synchronous δ18O negative excursion and intensified monsoon precipitation between 8 and 9 ka BP, contrasting with trends in North China. We suggest this difference may stem from changes in Northern Hemisphere summer insolation (NHSI) over the Holocene. The NHSI decrease since early Holocene weakens southwesterly winds and the Western Pacific Subtropical High, shifting the westerly jet and rainbelt southward. This causes reduced (increased) precipitation in North China (Northeast Asia), as well as reduced (increased) contribution of Pacific Ocean moisture to North China (Northeast Asia), resulting in δ18O increase (decrease) in North China (Northeast Asia).

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1029/2025GL114717
ISSN:	0094-8276
Additional Keywords:	speleothem, Northeast Asia, East Asian summer monsoon (EASM), contrasting pattern, Holocene
Date made live:	16 Oct 2025 13:37 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/540403

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