Physics
Scientific paper
Jul 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011georl..3813706o&link_type=abstract
Geophysical Research Letters, Volume 38, Issue 13, CiteID L13706
Physics
Atmospheric Composition And Structure: Troposphere: Composition And Chemistry, Atmospheric Composition And Structure: Troposphere: Constituent Transport And Chemistry, Global Change: Earth System Modeling (1225, 4316), Atmospheric Processes: Climate Change And Variability (1616, 1635, 3309, 4215, 4513), Atmospheric Processes: Tropical Dynamics
Scientific paper
We have successfully reproduced the Ozone ENSO Index (OEI) in the Goddard Earth Observing System (GEOS) chemistry-climate model (CCM) forced by observed sea surface temperatures over a 25-year period. The vertical ozone response to ENSO is consistent with changes in the Walker circulation. We derive the sensitivity of simulated ozone to ENSO variations using linear regression analysis. The western Pacific and Indian Ocean region shows similar positive ozone sensitivities from the surface to the upper troposphere, in response to positive anomalies in the Niño 3.4 Index. The eastern and central Pacific region shows negative sensitivities with the largest sensitivity in the upper troposphere. This vertical response compares well with that derived from SHADOZ ozonesondes in each region. The OEI reveals a response of tropospheric ozone to circulation change that is nearly independent of changes in emissions and thus it is potentially useful in chemistry-climate model evaluation.
Douglass Anne R.
Lang Christian
Nielsen Eric J.
Oman L. D.
Rodriguez Molina J.
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