Millennial-scale climatic change during the last interglacial period: Superparamagnetic sediment proxy from paleosol S1, western Chinese Loess Plateau

Citation
Xm. Fang et al., Millennial-scale climatic change during the last interglacial period: Superparamagnetic sediment proxy from paleosol S1, western Chinese Loess Plateau, GEOPHYS R L, 26(16), 1999, pp. 2485-2488
Citations number
28
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Earth Sciences
Journal title
GEOPHYSICAL RESEARCH LETTERS
ISSN journal
0094-8276 → ACNP
Volume
26
Issue
16
Year of publication
1999
Pages
2485 - 2488
Database
ISI
SICI code
0094-8276(19990815)26:16<2485:MCCDTL>2.0.ZU;2-L
Abstract
Detailed magnetic analyses of samples from the Jiuzhoutai well section on t he western Chinese Loess Plateau reveal high-resolution signals of summer m onsoon change. The last interglacial period is represented here by the 8-me ter thick S1 paleosol complex. We have used low-temperature remanence studi es to analyze variations in the concentration of superparamagnetic (SP) gra ins, which previous studies have shown to be largely of pedogenic origin. T he SP concentration, interpreted as a proxy for the extent of pedogenesis, shows millennial scale variations within S1. We conclude that the last inte rglacial period in Asia was characterized by rapid climate fluctuations, wi th at least one brief return to near-glacial conditions in the middle of ox ygen-isotope substage 5e.