Issue 11, 2006

Spatial interpolation of ambient ozone concentrations from sparse monitoring points in Belgium

Abstract

Due to scientific interest on the one hand and political and regulatory obligations on the other hand the monitoring of ozone in the troposphere is an important issue. To this end, in Belgium as in many other countries, a fixed network of monitoring stations is operated. In order to estimate the ozone concentrations over the whole territory, a model is needed to spatially complement the sparse measurements. This paper describes the development of an interpolation scheme which is aimed at fast operational use. The model uses the population density as auxiliary data to remove a spatial trend due to titration by nitric oxide. The residuals are interpolated by kriging. As a benchmark the inverse distance weighting interpolation method is used with and without the detrending. The proposed model systematically improves the interpolation and makes a significant difference when estimating human exposure to ozone. It is generic in design, easy to implement and flexible to changes in the monitoring network.

Graphical abstract: Spatial interpolation of ambient ozone concentrations from sparse monitoring points in Belgium

Article information

Article type
Paper
Submitted
31 Aug 2006
Accepted
04 Sep 2006
First published
15 Sep 2006

J. Environ. Monit., 2006,8, 1129-1135

Spatial interpolation of ambient ozone concentrations from sparse monitoring points in Belgium

J. Hooyberghs, C. Mensink, G. Dumont and F. Fierens, J. Environ. Monit., 2006, 8, 1129 DOI: 10.1039/B612607N

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