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Accidental toxic gas leakage coming with large exploitation and production activities in the west mountainous area of China is calling for a precise environmental risk analysis method about the leakage and dispersion consequences over complex terrains. However, most studies use simplified models deal with flat terrain scenarios and cannot predict such complex phenomena. This article systematically...
A measuring campaign was conducted in a street canyon (Runeberg St.) in Helsinki in 2003–2004. The concentrations of NOx, NO2, PM10 and PM2.5 were measured at street level and at roof level at an urban background location. This study utilises the data measured from 1 Jan to 30 April, 2004, when wind speed and direction measurements were also conducted on-site at the roof level. The computational...
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