富士山頂のエアロゾルの化学成分 : 1999年7月5-12日の観察

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Atmospheric chemistry research campaigns lasting one or two weeks have been performed at Mt. Fuji weather station (3776m a.s.l.) every summer since 1997. During these campaigns, aerosols, precipitation and fog samples are collected. Chemical species in aerosol and precipitation samples are determined using ionchromatography, low background γ spectrometry, etc. Trace gases (CO, H_2, NO_X, NO_y, HCl, H_2O_2 and MHP) have been measured, as well as O_3, which has been continuously observed since 1992 using a Dasibi type UV spectrophotometer. This report focuses on the chemical species in aerosol collected using low volume air samplers every 4hours at the summit and at Tarobo (1300m a.sl. on the ESE slope) during the 1999 campaign. The concentrations of S0_4^<2->, NH_4^+ and NO_3^- in aerosol at the summit were lower than those at Tarobo and other sites at lower elevations. The temporal changes of their concentrations at the summit appeared to be generally independent from those at Tarobo. However, during periods of very low wind speed, the concentration of S0_4^<2-> at the summit was relatively high. This corresponded with similar high concentrations at Tarobo, thus some uplift of polluted air mass from a lower elevation was also suspected as a source of the high S0_4^>2-> in the aerosol of the summit. In addition, the concentration of S0_4^<2-> in the aerosol, as well as the concentration of ozone at the summit, was high when continental air was passing the summit and low when marine air was passing.
東京農工大学の論文
2002-03-25

富士山頂のエアロゾルの化学成分 : 1999年7月5-12日の観察

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