Atmospheric mercury deposition on Fanjing Mountain Nature Reserve, Guizhou, China

Fanjing Mountain Nature Reserve (FMNR) is surrounded with several Hg emission sources within distances of 100–200 km. At the two sites studied, Tongren and Danzai, Hg emission and deposition fluxes, Hg concentration in the air, soil and other samples are all several hundred times higher than at other relatively clean areas. Hg accumulation in soil and moss at FMNR varies with the sampling heights. Total Hg deposition to this area has been estimated to be 115 μg m−2y−1 using moss bag technique. Dry deposition was determined to be about 5.2 μg m−2 month−1 during March to June, corresponding to more than 50% of the total deposition.