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Ishidoya, Shigeyuki; Tsuboi, Kazuhiro; Murayama, Shohei; Matsueda, Hidekazu; Aoki, Nobuyuki; Shimosaka, Takuya; Kondo, Hiroaki; Saito, Kazuyuki
SOLA, 2017, 2017-00-00, 20170101, Letnik: 13Journal Article
A continuous measuring system for atmospheric O2/N2 ratio was developed employing a paramagnetic oxygen analyzer. Sample air is allowed to flow through a water trap cooled to −80°C, and is introduced into the analyzer at a flow rate of 100 mL min−1 by stabilizing the pressure to an order of 10−1 Pa. The analytical reproducibility of the O2/N2 ratio achieved by the system is about 5 and 3 per meg for 2 and 30 minutes average values, respectively. The O2/N2 ratio values obtained by the system are in good agreement with the values obtained by our traditional system using a mass spectrometer. Using our new system, we started measuring the atmospheric O2/N2 ratio at Minamitorishima, Japan since December, 2015. Some preliminary results show clearly the O2/N2 day-to-day and seasonal variations that are in the opposite phase with the CO2 concentration.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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