Despite the similarity of these paleoclimatic records and the implication of global teleconnections, the magnitude and timing of millennial-scale events at different locations in China reveal regional variations in climatic conditions. Comparisons of the δ18O curves from Xiangshui and Yaoba Don Cave stalagmites with those from Qixin Cave and Hulu Cave show general concordance between millennial-scale events, albeit with some notable differences among all the records. The well-studied Hulu Cave records show δ18O values that are lower than those of Xiangshui and Yaoba Don Caves, reflecting geographical differences. Hulu Cave is located near the eastern coast at a relatively low elevation dominated by the East Asian monsoon. By comparison, Xiangshui Cave and Yaoba Don Cave are further inland on the eastern slope of the Yunnan–Guizhou plateau, which receives precipitation from both the East Asian monsoon and quasi-stationary frontal systems. Rainfall contributed by the East Asian summer monsoon is relatively diminished in this region by these geographic and atmospheric circulation conditions, resulting in higher δ18O values.
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