METHODOLOGY FOR A COMPARATIVE-EVALUATION OF 2 AIR-QUALITY MODELS

This paper presents a methodology for conducting an objective comparat ive evaluation of two air-quality models using several datasets. This methodology is designed to be simple to implement and understand, to r eliably discern improvement in performance, and to accommodate the use of datasets from a variety of field studies of varying quality. The r eliability of the comparison is enhanced by the segregation of the dat a into stability and distance regimes. The application of the methodol ogy to compare two air-quality models, using four datasets, demonstrat es its use as a practical means for comparing model performance.