Detection of Strong Precession Cycles from the Late Pliocene Sedimentary Records of Northeastern Tibetan Plateau

doi:10.1029/2019GC008447

IEECAS OpenIR > 黄土与第四纪地质国家重点实验室（2010~）

	Detection of Strong Precession Cycles from the Late Pliocene Sedimentary Records of Northeastern Tibetan Plateau
	Su, Qingda 1,2; Nie, Junsheng 1,3; Luo, Zeng 1; Li, Mingsong 4; Heermance, Richard 5; Garzione, Carmala 6,7
通讯作者	Nie, Junsheng(jnie@lzu.edu.cn)
	2019-08-01
发表期刊	GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
卷号	20 期号:8 页码:3901-3912
摘要	Recent studies demonstrate that aridification is sensitive to eccentricity forcing based on the northeastern Tibetan Plateau Cenozoic fluvio-lacustrine stratigraphic records. However, it is unknown whether this is a bias associated with the fact that higher frequency periods normally have larger age model uncertainties, which tend to decrease spectral power of higher frequency orbital cycles (precession and obliquity) and enlarge lower frequency ones (eccentricity). Here we detect strong and well-resolved (similar to 23 and similar to 19 kyr) precession cycles in the magnetic susceptibility record of late Pliocene fluvio-lacustrine sediments from the Qaidam Basin, northwestern China. We interpret the magnetic susceptibility as a proxy for the degree of chemical weathering in this region, based on the positive correlation between low-frequency magnetic susceptibility and frequency-dependent magnetic susceptibility. The different responses of magnetic susceptibility and a halite content proxy to orbital forcing suggest that aridification is more sensitive to eccentricity forcing than precipitation, but precipitation is more sensitive to precession forcing. This study indicates that different climatic aspects have different sensitivity to orbital forcing. Furthermore, a comparison of the magnetic susceptibility variations in the western Qaidam Basin and global ice volume proxy records suggests ice volume control of Qaidam Basin precipitation and chemical weathering at million-year timescales. Plain Language Summary The cyclicity of Earth's climate is driven by changes in solar insolation associated with variations in Earth's orbital parameters (precession, obliquity, and eccentricity). It remains unclear how different climate processes respond to different orbital forcing. Here, proxy records of aridification and precipitation from the northeastern Tibetan Plateau suggest that variations in aridification were sensitive to eccentricity forcing, while the precipitation changes were sensitive to precession forcing during the late Pliocene. This study indicates that different climatic systems have different sensitivity to orbital forcing.
关键词	precession cycles magnetic susceptibility Qaidam Basin orbital climate
DOI	10.1029/2019GC008447
关键词[WOS]	WESTERN QAIDAM BASIN ; CHINESE LOESS ; ENVIRONMENTAL MAGNETISM ; ASIAN MONSOON ; SUSCEPTIBILITY ; UPLIFT ; CYCLOSTRATIGRAPHY ; MAGNETOSTRATIGRAPHY ; STRATIGRAPHY ; CONSTRAINTS
收录类别	SCI ; SCI
语种	英语
资助项目	Second Tibetan Plateau Scientific Expedition[2019QZKK0704] ; National Natural Science Foundation of China[41672157] ; National Natural Science Foundation of China[41761144063] ; National Natural Science Foundation of China[41422204] ; Fundamental Research Funds for the Central Universities[lzujbky-2018ot05] ; Fundamental Research Funds for the Central Universities[lzujbky-2017-it84] ; Program of Introducing Talents of Discipline to Universities from China's Ministry of Education[BP2018001] ; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS[SKLLQG1819] ; U.S. National Science Foundation[1545859]
WOS研究方向	Geochemistry & Geophysics
项目资助者	Second Tibetan Plateau Scientific Expedition ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Program of Introducing Talents of Discipline to Universities from China's Ministry of Education ; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS ; U.S. National Science Foundation
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000490955300006
出版者	AMER GEOPHYSICAL UNION
引用统计	被引频次：16[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/13304
专题	黄土与第四纪地质国家重点实验室（2010~）
通讯作者	Nie, Junsheng
作者单位	1.Lanzhou Univ, Key Lab Western Chinas Environm Syst, Minist Educ, Coll Earth & Environm Sci, Lanzhou, Gansu, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian, Shaanxi, Peoples R China 3.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China 4.Penn State Univ, Dept Geosci, University Pk, PA 16802 USA 5.Calif State Univ Northridge, Dept Geol Sci, Northridge, CA 91330 USA 6.Univ Rochester, Dept Earth & Environm Sci, Rochester, NY USA 7.Rochester Inst Technol, Dept Environm Sci, Rochester, NY 14623 USA
推荐引用方式 GB/T 7714	Su, Qingda,Nie, Junsheng,Luo, Zeng,et al. Detection of Strong Precession Cycles from the Late Pliocene Sedimentary Records of Northeastern Tibetan Plateau[J]. GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,2019,20(8):3901-3912.
APA	Su, Qingda,Nie, Junsheng,Luo, Zeng,Li, Mingsong,Heermance, Richard,&Garzione, Carmala.(2019).Detection of Strong Precession Cycles from the Late Pliocene Sedimentary Records of Northeastern Tibetan Plateau.GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,20(8),3901-3912.
MLA	Su, Qingda,et al."Detection of Strong Precession Cycles from the Late Pliocene Sedimentary Records of Northeastern Tibetan Plateau".GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 20.8(2019):3901-3912.