Comparison of Canadian Air Quality Forecast Models With Tropospheric Ozone Profile Measurements Above Mid-Latitude North America During the IONS/ICARTT Campaign: Evidence for Stratospheric Input
Abstract
NASA, NOAA, Environment Canada, and several US universities pooled resources during the July-August 2004 ICARTT (International Consortium for Atmospheric Research on Transport and Transformation) study to launch daily ozonesondes at several sites across the eastern USA and Canada, under the IONS (INTEX Ozonesonde Network Study) program. At the same time, a number of air quality forecast models were run as part of ICARTT. Comparing IONS ozonesonde profiles with ozone fields from the Canadian CHRONOS and AURAMS models, we find that while the models show considerable skill at predicting ozone in the boundary layer and immediately above, they are unable to reproduce the typical profile of increasing mixing ratio with altitude. The discrepancy can be considerably reduced by assuming a downward flux of ozone from above the model lid. Estimates of the magnitude of this flux are compared with estimates of STE by other means.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2005
- Bibcode:
- 2005AGUFM.A33F..07T
- Keywords:
-
- 0345 Pollution: urban and regional (0305;
- 0478;
- 4251);
- 0365 Troposphere: composition and chemistry;
- 0368 Troposphere: constituent transport and chemistry;
- 3355 Regional modeling;
- 3362 Stratosphere/troposphere interactions