气候变化领域集成服务门户(CCPortal): The Early-Middle Pleistocene transition of Asian summer monsoon

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DOI	10.1016/j.palaeo.2020.109636
	The Early-Middle Pleistocene transition of Asian summer monsoon
	Peng X.; Ao H.; Xiao G.; Qiang X.; Sun Q.
发表日期	2020
ISSN	0031-0182
卷号	545
英文摘要	The global climate cyclicity transferred from an Early Pleistocene mode dominated by the obliquity periodicity to a new Middle Pleistocene state dominated by the eccentricity periodicity in the absence of any significant changes in orbital forcing, known as the Early–Middle Pleistocene transition (EMPT), is an unresolved issue of Milankovitch orbital theory. Here we contribute new insights into the orbital characteristic and dynamics of the Asian summer monsoon precipitation changes across the EMPT. Spectral analyses of precipitation over the past 1.6 Myr reconstructed from a new loess magnetic susceptibility (χ) stack suggest that the EMPT of the summer monsoon precipitation characterized by a shift from obliquity to eccentricity rhythm occurred over a ~640 kyr long-term period from ~1.24 to 0.6 Ma rather than quasi-instantaneously on a much shorter duration. The eccentricity cyclicity initiated as early as 1.24 Ma, subsequently intensified and became the dominated pacing from 1.1 Ma, while obliquity weakened at ~1.1 Ma and significantly weakened at ~0.7 Ma. These EMPT characteristics of the summer monsoon precipitation reflect complex impacts from global climate systems and regional climate changes in the Northern and Southern Hemispheres, and in both low- and high-latitude regions. © 2020 Elsevier B.V.
英文关键词	Chinese Loess Plateau; Eccentricity; Magnetic susceptibility; Obliquity; Sea Surface Temperature
语种	英语
scopus关键词	eccentricity; global climate; long-term change; magnetic susceptibility; monsoon; obliquity; Pleistocene; regional climate; sea surface temperature; spectral analysis; summer; China; Loess Plateau
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150567
作者单位	School of Geography and Information Engineering, China University of Geosciences, Wuhan, 430074, China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; CAS Center for Excellence in Quaternary Science and Global Change, Xi'an, 710061, China; Open Studio for Oceanic-Continental Climate and Environment Changes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266061, China; College of geology and environment, Xi'an University of Science and Technology, Xi'an, 710054, China
推荐引用方式 GB/T 7714	Peng X.,Ao H.,Xiao G.,et al. The Early-Middle Pleistocene transition of Asian summer monsoon[J],2020,545.
APA	Peng X.,Ao H.,Xiao G.,Qiang X.,&Sun Q..(2020).The Early-Middle Pleistocene transition of Asian summer monsoon.Palaeogeography, Palaeoclimatology, Palaeoecology,545.
MLA	Peng X.,et al."The Early-Middle Pleistocene transition of Asian summer monsoon".Palaeogeography, Palaeoclimatology, Palaeoecology 545(2020).