Available Model Runs

1) GMI aura2 combo chem, ASM winds, off line, 42 lev2) CTM e701 (1 y)GSFC chem, ASM winds, off line, 28 lev3) CTM e619 (50-y run)GSFC chem, FVGCM winds, off line, 28 lev4) CGCM ts2000GSFC chem, interactive, on line, 55 lev5) GMI FVGCM_9498combo chem, FVGCM winds, off line, 42 lev

All 2x2.5, within 1990-2006. Compare to McPeters et al. climo, OMI.

ClimoDiffAura2e701

Preview seasonal cycle line plots.

ASM Simulation ComparisonMeteorology (ASM vs GCM) dominates total O3 distribution, seasonal cycle.Largest column O3 differences from climo are in SH mid latitudes with ASM winds and either chemistry.ASM always too high at mid/high lats, but less so with combo-chem.Tropics are close to observed.

e619ts2000Climodiff

ClimodiffFVGCM Combo

Preview seasonal cycle line plots.

GCM Simulation ComparisonCGCM and 50-y GCM/CTM are generally similar to each other.CGCM and 50-y CTM (GSFC chem) show significant O3 hole lag. Other simulations do not.GCM simulations with GSFC chem show large excess column O3 at SH mid/high lats (similar to ASM). NH excess is not as large as ASM.Tropics are close to observed.

Combo chem makesless ozone globally.

Ozone hole appears a little late.

NH lower strat is alwayspositive, but offset bynegative above in somemonths.

Chemistry ComparisonCombo chem: With GCM total O3 is too low almost everywhere.Significantly low in SH high lats (except O3 hole) and between subtropicsUnusually good total O3 seasonal cycle at high lat NHWhy no delay in SH ozone hole break-up?