Evolution of the Asian summer monsoon and regional karst ecological environment since the middle ages in Southwest China.

During the LIA, the stalagmite δ 18 O values from Shijiangjun Cave, Furong Cave, Dongge Cave, and Shenqi Cave generally showed a negative trend, which contrasted with the positive δ 18 O trend observed in the stalagmite from Feilong Cave (this study) (Fig. 3 A,E,F,G,H).

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During the LIA, the δ 18 O values of stalagmites in northern China showed a positive trend (Fig. 3 B–D), significantly biased toward the δ 18 O values during the MWP.

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