Fig 1.
(a) Location of the Chinese Loess Plateau (CLP) in High Asia (map modified from NOAA; http://www.ngdc.noaa.gov/mgg/global/global.html).
(b) The central Chinese Loess Plateau and location of the sites referenced in the text (modified from Wu et al., 2002 [7]). The solid arrows indicate the pathways of the East Asian summer monsoons; dashed arrows indicate the pathways of the East Asian winter monsoons.
Fig 2.
Pedostraigraphy, magnetic susceptibility and OSL ages versus depth for the loess sections at Yaoxian (a), Jingchuan (b) and Huanxian (c) since the last glacial.
Fig 3.
Equivalent dose (De) determination for two samples, L2021 (a, b) and L2028 (c, d), using the SAR protocol.
(a) and (c), decay curves of natural OSL intensity. (b) and (d), representative SAR growth curve for a single aliquot of fine-grained quartz.
Table 1.
Data related to OSL age determinations of 33 samples from the Yaoxian, Jingchuan and Huanxian sections.
Fig 4.
The rapid change in magnetic susceptibility (MS) across the Pleistocene/Holocene transition along a transect from northwest to southeast across the CLP (b-g), and correlation with the LR04 δ18O record [27].
b Weinan section [35]; c Yaoxian section; d Luochuan section [17]; e Jingchuan section; f Yulin section [40]; g Huanxian section.
Fig 5.
Scatter plot of boundary age as defined by MS stratigraphy versus annual rainfall of July-Sep for different sites.
The different symbols used represent the different site locations on the CLP.