FIG 1.

Locations of the Tibetan lakes. The seven lakes studied here are represented by numbers (1 to 7) in gray circles, and those studied previously (20) are shown by gray triangles with numbers (8 to 15) next to them. The numbering of lakes is as follows: 1, DC; 2, AGC; 3, DZC; 4, ZGTC; 5, PE; 6, MNC; 7, PMYC; 8, Qinghai; 9, Kuhai; 10, Tusuhai; 11, Zhaling; 12, Shuiku; 13, Eling; 14, Xinxinhai; 15, Yanghu. (Base map from the U.S. Geological Survey.)