Survey of Volatile Organic Compounds (VOCs) in Mt. Tateyama Area

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  • 揮発性有機化合物(VOCs)の立山地域での実態
  • キハツセイ ユウキ カゴウブツ(VOCs)ノ タテヤマ チイキ デ ノ ジッタイ

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Abstract

At Tateyama Murodo (altitude : 2,450m) and Tateyama Gondola (altitude : 1,180m) in Mt. Tateyama area, 30 components of VOCs were measured from the beginning of May to the end of October 2010. <BR>Most of 30 VOCs components were detected. Benzene, toluene, and ethyl benzene showed relatively higher average values. <BR>Acording to the results of back trajectory analysis, air parcels transported from the East Asia occupied about 67% at Tateyama Murodo and about 42% at Tateyama Gondola. It was proved that both points showed a clear environment than the urban area since the average value of all VOCs at both points were lower than those at urban areas. <BR>We have compared the concentrations at both measuring points with the background data in the four directions at Cape Hedo in Okinawa. Although the concentrations of toluene at both points were almost equivalent or slightly lower than the background data in the four directions, the others were almost equivalent or slightly higher than the background data. <BR>Benzene/toluene ratios of the East Asia source at Tateyama Murodo were proved to be extremely higher than those of the other sources. The benzene/toluene ratio is considered to be used for the judgment of contribution of the East Asia source.

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