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Loess magnetic susceptibility flux: A new proxy of East Asian monsoon precipitation
Kong, Xianghui1,2,5; Zhou, Weijian1,2,5; Beck, J. Warren3,4; Xian, Feng1,5; Qiang, Xiaoke1,2,6; Ao, Hong1,2; Wu, Zhenkun1,5; An, Zhisheng1,2,7,8
Corresponding AuthorKong, Xianghui(
AbstractMagnetic susceptibility (chi) of loess-paleosol sequences on the Chinese Loess Plateau (CLP) has been widely used as a proxy for East Asian summer monsoon (EASM) precipitation variability. Such records typically show strong climate forcing in the-100 ka orbital eccentricity band, but exhibit weak precessional (-23 ka) forcing relative to that seen in oxygen isotopes from marine sediments. This is puzzling as monsoons should be highly sensitive to precession variations. We assert that this lack of precessional signal is because chi is a concentration, which is strongly affected by the dilution effect of dust sedimentation rate superimposed on rainfall rate. chi-flux on the other hand corrects for dust accumulation rate and bulk density effects to better reveal pedogenic mineral ingrowth rates associated with rainfall. In this study, we compare three 600 ka records of loess pedogenic chi-flux from the CLP with Chinese speleothem delta O-18 records and a 550 ka loess-paleosol 10Be flux record from Baoji which has also been used as a monsoon precipitation proxy record. Pedogenic chi-flux exhibits clear signals of orbital precession, whereas chi (-concentration) does not.
KeywordPedogenic magnetic susceptibility flux Chinese loess Monsoon precipitation proxy Orbital forcing
Indexed BySCI ; SCI
Funding ProjectChinese Academy of Sciences[QYZDY-SSW-DQC010] ; Chinese Academy of Sciences[XDB40010100] ; National Natural Science Foundation of China[41930321] ; U.S. National Science Foundation[EAR-0908709] ; U.S. National Science Foundation[EAR-0902633] ; U.S. National Science Foundation[EAR-0929458]
WOS Research AreaGeology
Funding OrganizationChinese Academy of Sciences ; National Natural Science Foundation of China ; U.S. National Science Foundation
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000568796600001
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorKong, Xianghui
Affiliation1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China
2.Chinese Acad Sci, Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China
3.Univ Arizona, Dept Phys, Tucson, AZ 85721 USA
4.Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA
5.Xian AMS Ctr, Shaanxi Key Lab Accelerator Mass Spectrometry & A, Xian 710061, Peoples R China
6.Qingdao Natl Lab Marine Sci & Technol, Open Studio Ocean Continental Climate & Environm, Qingdao 266061, Peoples R China
7.Beijing Normal Univ, Interdisciplinary Res Ctr Earth Sci Frontier, Beijing 100875, Peoples R China
8.Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Xian 710049, Peoples R China
Recommended Citation
GB/T 7714
Kong, Xianghui,Zhou, Weijian,Beck, J. Warren,et al. Loess magnetic susceptibility flux: A new proxy of East Asian monsoon precipitation[J]. JOURNAL OF ASIAN EARTH SCIENCES,2020,201:6.
APA Kong, Xianghui.,Zhou, Weijian.,Beck, J. Warren.,Xian, Feng.,Qiang, Xiaoke.,...&An, Zhisheng.(2020).Loess magnetic susceptibility flux: A new proxy of East Asian monsoon precipitation.JOURNAL OF ASIAN EARTH SCIENCES,201,6.
MLA Kong, Xianghui,et al."Loess magnetic susceptibility flux: A new proxy of East Asian monsoon precipitation".JOURNAL OF ASIAN EARTH SCIENCES 201(2020):6.
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