Figure 2. Variation in the reconstructed annual precipitation and other environmental proxies since 14.7 ka from Gonghai Lake, North China.

(a) Percentage of tree pollen (%). (b) Percentage of herb pollen (%). (c) Percentage of broad leaf tree pollen (%). (d) Annual precipitation reconstructed by a calibration function applied to the fossil pollen assemblages. (e) Magnetic susceptibility. (f) Carbonate content. Shaded area from ~11.5–3.3 ka denotes an interval of stable lake status and maximum vegetable cover in the Gonghai Lake catchment.