Distribution of the mercury concentration in the top 50 cm cores of wetland sediments across the Qinghai-Tibet Plateau. (IMAGE)

Science China Press

Distribution of the mercury concentration in the top 50 cm cores of wetland sediments across the Qinghai-Tibet Plateau.

Caption

a Map showing average mercury concentrations and annual precipitation amount. b Map showing the types of vertical mercury trend. c Mercury concentration decreasing with the depth of cores. d Mercury concentration peaking in sub-layer of the core. e Mercury concentration with a non-consistent trend

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