Hydroclimatic changes on multiple timescales since 7800 y BP in the winter precipitation-dominated Central Asia.

During this period, the degree of humification of peat from the Altai Mountains shows a decreasing trend ( Fig. 3 N ), suggesting weakening microbial activities under anaerobic reducing conditions caused by enhanced precipitation ( 23 ).

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The δ 18 O, δ 13 C, and Sr/Ca records from Talisman cave show an increasing trend with notable centennial- to decadal-scale variations since 7,800 y BP ( Fig. 2 ).

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