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Hemispheric CMAQ Application and Evaluation for 2016
Citation:
Henderson, B., P. Dolwick, C. Jang, C. Misenis, N. Possiel, B. Timin, A. Eyth, J. Vukovich, R. Mathur, C. Hogrefe, G. Pouliot, W. Appel, AND K. Brehme. Hemispheric CMAQ Application and Evaluation for 2016. 2018 CMAQ Annual Conference, Chapel Hill, NC, October 22 - 24, 2018.
Impact/Purpose:
This work represents a first step in adoption of the Hemispheric CMAQ model by OAQPS. OAQPS scientists are conducting a detailed evaluation of the Hemispheric-CMAQ model for 2016 and also comparing it with the GEOS-Chem modeling system used in previous analysis. The results from this modeling effort will ultimately be coupled with regional modeling to estimate fine space and temporal scale international contribution estimates.
Description:
Inter-continental transport of air pollution occurs at time scales of days to weeks within the northern hemisphere. Quantifying transport of anthropogenic pollution between countries requires a modeling system that credibly represents global processes. Our work evaluates two models, Hemispheric CMAQ and GEOS-Chem that cover the northern hemisphere. Our application uses updated emissions from the EPA 2016 modeling platform, Mexico, Canada, and China to improve the accuracy of domestic and foreign sources. This presentation will cover evaluation with surface monitors, sondes, aircraft, and satellites. Preliminary results show important systematic differences as well as differences that have a latitudinal gradient. We use contrasts in model performance and process-level differences between the models to identify influential uncertainties and recommend future research. The results from this modeling effort will ultimately be coupled with regional modeling to estimate fine space and temporal scale international contribution estimates.
