Guizhou is located in the Circum-Pacific Global Mercuriferous Belt, and mercury concentrations in soil in this area are enriched. In-situ total gaseous mercury (TGM) exchange fluxes between air and soil surface were intensively measured at four sampling s Guizhou is located in the Circum-Pacific Global Mercuriferous Belt, and the concentrations of mercury in soil in this area are enriched. In-situ total gaseous mercury (TGM) exchange fluxes between air and soil surface were intensively measured at four sampling s