《Table 4 Pearson, s correlation coefficient and P value between Hg flux and impact factors in spring

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《Measurement and Scaling of Mercury on Soil and Air in a Historical Artisanal Gold Mining Area in Northeastern China》

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The summary of TGM measured seasonally from all sampling sites is shown in Table 1.The data indicate that the mean TGM was（55±21）ng/m3 in the research area during the sampling period，and those in Jiapigou Township，Wudaocha，Sandaocha，Erdaocha，Laojinchang and Erdaogou were（56±33）ng/m3，（33±13） ng/m3，（116±28） ng/m3，（94±33） ng/m3，（22±8） ng/m3 and（24±10）ng/m3，respectively.These values were obviously higher than those shown in the previous study（Wan et al.，2009），in which it was reported that the annual mean value of TGM was（3.22±1.78）ng/m3 on Changbai Mountain，the highest mountain in Northeast China.The monitoring values in this campaign were also much higher than the TGM background value（1.5–2.0 ng/m3）of the Northern Hemisphere（Ebinghaus et al.，2002；Lamborg et al.，2002；Steffen et al.，2002）.