Fig. 2: Multiannual Yellow River hydroclimatic vulnerability model. | Communications Earth & Environment

Fig. 2: Multiannual Yellow River hydroclimatic vulnerability model.

From: Hydroclimatic instability accelerated the socio-political decline of the Tang Dynasty in northern China

Fig. 2

High values (blue) indicate low composite drought vulnerability; low values (red) indicate increased composite drought vulnerability (hydrological and agricultural drought). The drought vulnerability model is a composite of flow accumulation and the multiannual cumulative SPEI from 1980 to 2018 CE91 (see supplementary Table S1 for site location and names and Figs. S4–S6 for data density plots). Administrative centers are given in red, military sites in green and Tang urban centers in black. A, B Urban center focus plots.

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