Articles | Volume 20, issue 3
Research article
10 Feb 2020
Research article |  | 10 Feb 2020

On the limit to the accuracy of regional-scale air quality models

S. Trivikrama Rao, Huiying Luo, Marina Astitha, Christian Hogrefe, Valerie Garcia, and Rohit Mathur

Model code and software

CMAQv5.0.2 (Version 5.0.2) US EPA Office of Research and Development

Short summary
Since numerical air quality models do not explicitly simulate stochastic variations in the atmosphere, there will always be differences between modeled and measured pollutant levels even when the model's physics, chemistry, numerical analysis, and its input data are perfect. This paper quantifies the inherent uncertainty in regional models due to the stochastic nature of the atmosphere. A knowledge of the expected error helps model developers in evaluating the real progress in improving models.
Final-revised paper