Abstract
In this article we develop and compare several space–time models for hourly ambient PM10 collected in the Vancouver area. The models consist of a deterministic trend plus stochastic residuals. We find that the ambient PM10 field over the area has an essentially constant temporal pattern across its monitoring sites; the spatial variation is relatively small. Our comparison leads us in the end to adopt a model with a common temporal correlation structure for all the sites. The residuals after eliminating serial correlation prove to have at most small-scale spatial correlations, suggesting that dense monitoring networks would be necessary to make widespread spatial interpolation meaningful. Copyright © 1999 John Wiley & Sons, Ltd.
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