Inderscience Publishers

Field measurements within a quarter of a city including a street canyon to produce a validation data set

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Air pollutants and meteorological parameters were measured continuously by in situ instruments, path-averaging techniques (up to three DOAS systems), and SODAR inside a street canyon and in the surrounding area of 1 km x 1 km (Gottinger Strasse in Hanover, Germany) from 2001 until 2003 which are available in the data bank ValiData for validation of microscale models. During three IOPs tracer experiments with a SF6 line source, sampling techniques of up to 15 sites and path-averaging FTIR spectrometry were performed. Concentration measurement results at roof level were anti-correlated with SODAR mixing layer heights, while those inside the street canyon are not. Re-circulation flow patterns inside the street canyon were studied together with corresponding wind tunnel experiments.

Keywords: urban street canyons, remote sensing, FTIR, DOAS, SODAR, rotorlike circulation, mixing height, small-scale modelling, validation data, dispersion modelling, air pollution, air quality, Germany, microscale modelling, tracer experiments, air flow, pollution measurement, simulation, recirculation flow

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