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.