An improved comparison of Chinese loess with deep-sea delta O-18 record over the interval 1.6-2.6 Ma

Based on a refined orbital timescale for the lower portion of Pleistocene loess-paleosol sequence at Lingtai section, we present an improved comparison of Chinese loess with deep-sea delta(18)O record over the interval 1.6-2.6 Ma. Unlike previous land-ocean comparison, our result suggests that each...

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Bibliographic Details
Published in:Geophysical Research Letters
Main Authors: Sun, YB, An, ZS
Format: Article in Journal/Newspaper
Language:English
Published: AMER GEOPHYSICAL UNION 2004
Subjects:
Chinese loess
East Asian monsoon
deep-sea delta O-18
land-ocean comparison
Geology
OXYGEN-ISOTOPE RECORD
ASTRONOMICAL CALIBRATION
PALEOCLIMATE RECORDS
NORTH-ATLANTIC
GRAIN-SIZE
PLATEAU
CLIMATE
DEPOSITS
VARIABILITY
TIMESCALE
Geosciences
Multidisciplinary
North Atlantic
Online Access:http://ir.ieecas.cn/handle/361006/12062
https://doi.org/10.1029/2004GL019716
Description
Summary:Based on a refined orbital timescale for the lower portion of Pleistocene loess-paleosol sequence at Lingtai section, we present an improved comparison of Chinese loess with deep-sea delta(18)O record over the interval 1.6-2.6 Ma. Unlike previous land-ocean comparison, our result suggests that each paleosol unit from S-25 to S-32 is approximately including two interglacial oxygen isotope stages. The rationality of our revised comparison is supported by the well-constrained ages of geomagnetic reversal boundaries in Chinese loess, and the almost cycle-to-cycle correlation between the grain size and deep-sea delta(18)O record. Spectral analyses demonstrate that variations of the magnetic susceptibility and grain size in the interval 1.6-2.6 Ma were dominated by a prominent 410-ka periodicity, implying a possible response of the East Asian monsoon evolution to orbital eccentricity forcing.

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