1. Testable sensitivities of CTM simulations to meteorological fields Yuhang Wang Georgia Tech

2. Models GEOS-CHEM: Used in some comparisons; provides chemical boundary conditions. Polar MM5 driven regional CTM: Boundary layer sensitivities MM5 driven RCTM (REAM): spring- summer transition MM5 and WRF driven REAM: convection and lightning in summer – INTEX-NA

3. Default ETA MYJ 2.5-order closure Modified ETA (Zeng et al., 2006) Arctic surface ozone depletion

4. Modified ETA Default ETA

5. Boundary layer height at the South Pole, 2003 (Wang et al., 2007)

6. (Choi et al, 2007) Spring-summer transition:Trop NO 2 column retrievals for February-May, 2000

7. Surface O 3 concentrations and afternoon mixing heights February-May, 2000

8. (Zhao et al., 2007) MM5: Grell scheme WRF: new K-F scheme Summer time convection and lightning

9. Lightning impact on NO 2 column WRF-REAM MM5-REAM

10. Lightning impact on NO 2 at 500 hpa

11. Convective scavenging of HNO 3

12. Surface O 3 simulations