Fig. 4

Comparison of paleoclimate records for four regions of the TPSM (Central Tibet, W Himalaya, SE Tibet, E Himalaya). (a) Lake volume reconstruction of Tangra Yum Co, Central Tibet39; (b) Principal Component Analysis (PCA) scores of the first axis for the pollen samples from Tangra Yum Co, Central Tibet, and the negative values related to humid conditions and positive values related to arid conditions40; (c) Lake level reconstruction of the Lake Tso Moriri, W Himalaya37; (d) Total organic carbon concentration in the sediment of Mapam Yum Co, W Himalaya38; (e) Cyperaceae percentages indicative for moisture regime from Lake Naleng, SE Tibet46; (f) The chironomid-inferred mean July temperature of the Lake Tiancai in SE Tibet44; (g) Sand content change in PY104PC of Pumoyum Co, E Himalaya42; (h) Principal Component Analysis (PCA) scores of the first axis for the pollen samples from Mabu Co, E Himalaya, and the negative values related to humid conditions and positive values related to arid condition41.