Title: Evaluation of the chemistry transport model system KAMM/DRAIS, based on daytime ground-level ozone data

Authors: Klaus Nester, Hans-Jurgen Panitz

Addresses: Forschungszentrum Karlsruhe/Universitat Karlsruhe, Institut fur Meteorologie und Klimaforschung, Postfach 3640, D-76021 Karlsruhe, Germany. ' Forschungszentrum Karlsruhe/Universitat Karlsruhe, Institut fur Meteorologie und Klimaforschung, Postfach 3640, D-76021 Karlsruhe, Germany

Abstract: The main objective of this study was to estimate the reliability of the chemistry transport model KAMM/DRAIS to predict increased ozone concentrations near ground level. The evaluation was carried out on the basis of the ozone measurements collected during episodes of the TRACT, FLUMOB, and BERLIOZ experiments. The ozone data of all episodes have been evaluated for the time period between 10 UTC and 17 UTC. Hourly and half-hourly data as well as peak values have been compared. Scatter diagrams, including regression line, bias and correlation coefficient and cumulative frequency distributions, have been analysed. In 50% and 90% of all cases the absolute difference between the measured and simulated ozone values is less than 8 ppb and 20 ppb, respectively. A comparison of the statistical parameters from this study with those from other evaluations shows that the KAMM/DRAIS model provides comparable results, indicating a good performance of the model.

Keywords: chemistry transport model; experimental episodes; ground-level ozone concentrations; model assessment; model evaluation; statistical analysis; ozone measurement; simulation.

DOI: 10.1504/IJEP.2004.005494

International Journal of Environment and Pollution, 2004 Vol.22 No.1/2, pp.87 - 107

Published online: 12 Oct 2004 *

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