Continuous NH3 Monitoring in Swiss National Air Quality Network
Jan 01 2000
In 2002, EMPA, a Swiss institute responsible for air quality monitoring, and Omnisens started a successful collaboration in view of providing analyzers suitable for an automated network. Following a year test phase, the instruments were gradually deployed in the so called NABEL network, made of 16 fully automated stations spread over the Swiss territory, featuring urban and agricultural areas up to the alpine summits. TGA310 are currently installed at representative locations in the network. These activities are complemented by a dense network of passive samplers measuring NH3 as two weeks average values.
Apart from continuous measurement of NH3 in Switzerland, TGA310 provided important scientific results. For instance a correlation between NH3 concentration and road traffic was demonstrated and, at rural sites, the NH3 concentration was found to be in thermodynamic equilibrium with the aerosol phase during most time of the year.
Building on the Swiss experience, TGA310 are now gradually deployed in Europe and Japan.
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