Influence of Doubled CO2 on Ozone via Changes in the Brewer–Dobson Circulation
Abstract
In this short note, the effect of enhanced circulation due to doubling CO2 on ozone is investigated. The difference of Brewer–Dobson circulation (BDC) between the doubled CO2 and control run from an idealized atmospheric general circulation model is added to the BDC climatology derived from National Centers for Environmental Prediction—Department of Energy Reanalysis 2 (NCEP2) from 1979 to 2002. Then it is used to drive the California Institute of Technology/Jet Propulsion Laboratory (Caltech/JPL) two-dimensional chemistry and transport model. The results reveal that the total ozone increases by 7 and 3.5 Dobson units (DU) in the high latitudes of the Northern and Southern Hemispheres, respectively, and decreases by 4 DU in the Tropics as a result of the increase in BDC associated with doubled CO2. If the change of eddy mixing coefficients after doubling CO2 is also considered, the total ozone will increase by 6.5 and 3 DU in the high latitudes of the Northern and Southern Hemispheres after combining both effects from the change in BDC and eddy mixing coefficients.
Additional Information
© 2007 American Meteorological Society. Manuscript received 8 February 2006, in final form 7 November 2006. This work was supported by NASA Grant NNG04GD76G to the California Institute of Technology, and by the Climate Dynamics Program of the National Science Foundation under Grant ATM-0409075 to the University of Washington.Files
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Additional details
- Eprint ID
- 8856
- Resolver ID
- CaltechAUTHORS:JIAjas07
- Created
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2007-09-21Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field
- Caltech groups
- Division of Geological and Planetary Sciences (GPS)