Operational chemical weather forecasting with the ECCC  online Regional Air Quality Deterministic Prediction  System version 023 (RAQDPS023) – Part 2: Multi-year  prospective and retrospective performance evaluation

Moran, Michael D.; Lupu, Alexandru; Savic-Jovcic, Verica; Zhang, Junhua; Zheng, Qiong; Boutzis, Elisa I.; Mashayekhi, Rabab; Stroud, Craig A.; Ménard, Sylvain; Chen, Jack; Menelaou, Konstantinos; Munoz-Alpizar, Rodrigo; Kornic, Dragana; Manseau, Patrick M.

doi:10.5194/gmd-19-4205-2026

Articles | Volume 19, issue 10

https://doi.org/10.5194/gmd-19-4205-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/gmd-19-4205-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 19, issue 10

Model evaluation paper

|

20 May 2026

Model evaluation paper |

| 20 May 2026

Operational chemical weather forecasting with the ECCC online Regional Air Quality Deterministic Prediction System version 023 (RAQDPS023) – Part 2: Multi-year prospective and retrospective performance evaluation

Michael D. Moran, Alexandru Lupu, Verica Savic-Jovcic, Junhua Zhang, Qiong Zheng, Elisa I. Boutzis, Rabab Mashayekhi, Craig A. Stroud, Sylvain Ménard, Jack Chen, Konstantinos Menelaou, Rodrigo Munoz-Alpizar, Dragana Kornic, and Patrick M. Manseau

Data sets

Operational GEM-MACH model evaluation against air quality surface observation networks across Canada and the United States for 2013-16 and 2021/22 Alexandru Lupu and Michael D. Moran https://doi.org/10.5281/zenodo.16944371

RAQDPS023 Predicted 2013-2016 and 2021/22 Seasonal and Annual Dry, Wet, and Total Acidic Deposition Fields and Related Concentration Fields for North America Michael Moran and Verica Savic-Jovcic https://doi.org/10.5281/zenodo.16970403

Supplementary material for paper "Operational chemical weather forecasting with the ECCC online Regional Air Quality Deterministic Prediction System version 023 (RAQDPS023) - Part 2: Multi-year prospective and retrospective performance evaluation'' by M Michael D. Moran and Alexandru Lupu https://doi.org/10.5281/zenodo.19489036

Model code and software

Global Environmental Multiscale model‒Modelling Atmospheric CHemistry (GEM-MACH) version 3.1.0.0 Verica Savic-Jovcic et al. https://doi.org/10.5281/zenodo.15330612

Canadian Fire Emissions Prediction System (CFFEPS) v4.1 Kerry Anderson and Jack Chen https://doi.org/10.5281/zenodo.15305591

Version 5.1 package for the Global Environmental Multiscale (GEM) model (ECCC-ASTD-MRD/gem: 5.1.0) ECCC GEM Development Team, Environment and Climate Change Canada https://doi.org/10.5281/zenodo.17782580

GEM-MACHv3.1.1.2 GEM-MACH development team https://doi.org/10.5281/zenodo.13952893

Short summary

We present an evaluation of 6 annual runs made with the Regional Air Quality Deterministic Prediction System, an operational chemical weather forecast system for North America. Measurements used included NO₂, O₃, and PM_2.5, 8 other gas-phase species, 7 PM_2.5 species, and 3 ions in precipitation. Routine scores were augmented by many stratified analyses, and the results pointed to some model components where improvements are desirable. A companion paper provides a full description of the system.