富士山麓森林大気微量気体計測システムを用いた森林と市街地における窒素酸化物・オゾン濃度変化の比較

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  • フジ サンロク シンリン タイキ ビリョウ キタイ ケイソク システム オ モチイタ シンリン ト シガイチ ニ オケル チッソ サンカブツ ・ オゾン ノウド ヘンカ ノ ヒカク

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We have developed a monitoring system for nitrogen oxide (NO), nitrogen dioxides (NO_2), and ozone (O_3) in theatmosphere in a Fujiyoshida forest site at the foot of Mt. Fuji. The air was sampled above the canopy at the height of 27 musing a flux tower in the observation site. The concentration of NO, NO_2 and O_3 were successfully observed continuously for amonth in September 2011. We tested the monitoring system using NO, NO_2 and O_3 analyzers with the length of 40 m PTFE tube in the laboratory inUenohara Campus of Teikyo University of Science. The observed data were in good agreements with the data obtained byAtmospheric Environmental Regional Observation System (AEROS) in the Uenohara city centre which located in a few kmaway from the Uenohara Campus. We constructed the monitoring system of NO, NO_2 and O_3 concentrations in the atmosphereabove the canopy in the Fujiyoshida forest site at the foot of Mt. Fuji. The primary data were successfully observed for amonth and discussed with the data obtained by AEROS in the Fujiyoshida city center. The concentrations of NO and NO_2 in the Fujiyoshida forest were increased in the early morning and in the evening, andwere smaller than in the city center. This suggested NO and NO_2 were emitted by traffics in the city center and diffused tothe forest. However the concentrations of O_3 in the forest were larger than in the Fujiyoshida city centre, especially in thenighttime. A possible interpretation is that O_3 in the city centre reacts with NO, and O_3 reduces its concentration. We willcontinue the observation and the observation results will give us more information of O_3 in the forest.

identifier:13

identifier:KJ00009454219

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