Predominant orbital forcing on Asian hydroclimate during the Miocene Climatic Optimum

doi:10.1130/B37776.1

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	Predominant orbital forcing on Asian hydroclimate during the Miocene Climatic Optimum
	Cao, Yuge 1; Zhang, Rui 2; Wang, Shiqi3 ; Kravchinsky, Vadim A.4; Gong, Hujun 1; Qin, Jie 2; Sagnotti, Leonardo 5; Ferraro, Joseph, V ; Wei, Xiaohao 1; Xian, Feng 7,8; Zhang, Sophia Moxuan 9
	2025-04-24
发表期刊	GEOLOGICAL SOCIETY OF AMERICA BULLETIN
ISSN	0016-7606
页码	15
通讯作者	Zhang, Rui(ruizhang@zjnu.edu.cn) ; Kravchinsky, Vadim A.(ruizhang@zjnu.edu.cn) ; Gong, Hujun(gonghujun@nwu.edu.cn)
摘要	The Miocene Climatic Optimum (MCO), spanning from ca. 17 Ma to 14 Ma, marks a pivotal interval in global climate history with elevated greenhouse gas levels and a 3-7 degrees C increase in global temperatures, disrupting the long-standing Cenozoic cooling trend. However, the dynamics that drove the MCO in the continental realm are not well understood. The driving forces may have conditioned regional scale climate phenomena, such as shifts from an arid to humid environment with a significant temperature rise due to elevated greenhouse gases. Terrestrial outcrops in eastern Asia are particularly valuable for studying the MCO's continental impacts due to their exceptional preservation of orbital-scale sedimentary cycles and sensitivity to monsoonal dynamics, which are pivotal for disentangling hydroclimate-orbital linkages. Notably, the hydrological circulation and orbital influence during the MCO in eastern Asia are still understudied. Employing magneto-cyclostratigraphic chronology, we analyzed samples from a 120-m-thick outcrop section in inland Asia, revealing detailed, orbital-scale, terrestrial responses to the MCO. Based on cyclostratigraphic analysis, our findings emphasize the pronounced influence of two orbital cycles: the dominant 405-k.y. eccentricity and the subtler 173-k.y obliquity band. Based on the magnetic susceptibility, Fe content and Rb/Sr ratio of rock samples, we concluded that eccentricity and obliquity climate control shifted the summer movement of the Intertropical Convergence Zone in East Asia, impacting northward moisture transport. Significantly, we identified six drought events based on variations in magnetic susceptibility, geochemical proxies (i.e., Fe content and Rb/Sr ratio) and correlation with global phenomena, such as distinct delta C-13 positive excursions (such as the Monterey Excursion), Antarctic cooling phases (Mi-events), global sea surface temperature changes, and sea-level fluctuations. Our results provide insights into climate variations on both regional and global scales, with implications for past and potential future scenarios.
DOI	10.1130/B37776.1
关键词[WOS]	EAST EQUATORIAL PACIFIC ; MIDDLE MIOCENE ; TIBETAN PLATEAU ; PRIMARY PRODUCTIVITY ; EVOLUTION ; BASIN ; EOCENE ; OLIGOCENE ; CHINA ; MYR
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China[2023YFF0804501] ; National Natural Science Foundation of China[41772027] ; National Natural Science Foundation of China[41930321] ; State Key Laboratory of Loess Science[SKLLQG2104]
项目资助者	National Key Research and Development Program of China ; National Natural Science Foundation of China ; State Key Laboratory of Loess Science
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:001477652700001
出版者	GEOLOGICAL SOC AMER, INC
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/24764
专题	中国科学院古脊椎动物与古人类研究所
通讯作者	Zhang, Rui; Kravchinsky, Vadim A.; Gong, Hujun
作者单位	1.Northwest Univ, Dept Geol, State Key Lab Continental Evolut & Early Life, Xian 710069, Peoples R China 2.Zhejiang Normal Univ, Coll Geog & Environm Sci, Jinhua 321004, Peoples R China 3.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing, Peoples R China 4.Univ Alberta, Dept Phys, Geophys, Edmonton, AB, Canada 5.Ist Nazl Geofis & Vulcanol, Rome, Italy 6.Baylor Univ, Inst Archaeol, Dept Anthropol, Waco, TX USA 7.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess Sci, Xian, Peoples R China 8.Chinese Acad Sci, CAS Ctr Excellence Quaternary Sci & Global, Xian, Peoples R China 9.Old Scona Acad, 10523 84 Ave NW, Edmonton, AB T6E 2H5, Canada
推荐引用方式 GB/T 7714	Cao, Yuge,Zhang, Rui,Wang, Shiqi,et al. Predominant orbital forcing on Asian hydroclimate during the Miocene Climatic Optimum[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2025:15.
APA	Cao, Yuge.,Zhang, Rui.,Wang, Shiqi.,Kravchinsky, Vadim A..,Gong, Hujun.,...&Zhang, Sophia Moxuan.(2025).Predominant orbital forcing on Asian hydroclimate during the Miocene Climatic Optimum.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,15.
MLA	Cao, Yuge,et al."Predominant orbital forcing on Asian hydroclimate during the Miocene Climatic Optimum".GEOLOGICAL SOCIETY OF AMERICA BULLETIN (2025):15.