Fig. 4From: Changes of lake organic carbon sinks from closed basins since the Last Glacial Maximum and quantitative evaluation of human impactsSoil organic carbon density in contemporary closed basins and site locations of lake records used in this study. Black dots show the 82 closed-basin lakes with available geophysical-chemical data of lake water. Yellow dots show the 43 closed-basin lakes with available organic geochemical proxies. Green triangles show the 39 closed-basin lakes with available organic carbon dataBack to article page