Abstract
The atmospheric and aquatic PAHs transference processes were discussed using five isomer ratios values of PAHs. The similarity of a pair of datasets of different environment fields or pollution sources for each isomer ratio were calculated as effect size d, and the mean of the d values of five isomer ratios were applied as the index of similarity. From the analysis, diesel emission and/or biomass burning resideus were estimated to be major contributions for almost all the datasets of environmental samples. The pollution loading and path to the PAHs of coastal sediments in Hiroshima bay area were examined and diesel and biomass buring were considered to be major sources for the West side area of the bay and the biomass buring was considered to be for the East side area.
