Meteorological and Emission Sensitivity of Hemispheric Ozone and Particulate Matter
Abstract
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. Emissions and transport have independent uncertainties that need exploration and both affect US national composition. Our work evaluates two models, Hemispheric CMAQ and GEOS-Chem that cover the northern hemisphere for ozone and particulate matter. Our application uses updated emissions from the EPA 2016 modeling platform, Mexico, Canada, and China to improve the representation of emissions from domestic and foreign sources. Our results include evaluation with surface monitors, sondes, aircraft, and satellites. Preliminary results show important systematic differences between models 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.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2018
- Bibcode:
- 2018AGUFM.A33K3333H
- Keywords:
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- 0322 Constituent sources and sinks;
- ATMOSPHERIC COMPOSITION AND STRUCTUREDE: 0345 Pollution: urban and regional;
- ATMOSPHERIC COMPOSITION AND STRUCTUREDE: 0365 Troposphere: composition and chemistry;
- ATMOSPHERIC COMPOSITION AND STRUCTUREDE: 0478 Pollution: urban;
- regional and global;
- BIOGEOSCIENCES