Testable sensitivities of CTM simulations to meteorological fields

Yuhang Wang

Georgia Tech

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

Default ETA MYJ 2.5-order closure

Modified ETA

(Zeng et al., 2006)

Arctic surface ozone depletion

Modified ETA

Default ETA

Boundary layer height at the South Pole, 2003

(Wang et al., 2007)

(Choi et al, 2007)

Spring-summer transition:Trop NO2 column retrievals for February-May, 2000

Surface O3 concentrations and afternoon mixing heights February-May, 2000

(Zhao et al., 2007)

MM5: Grell schemeWRF: new K-F scheme

Summer time convection and lightning

Lightning impact on NO2 columnWRF-REAM

MM5-REAM

Lightning impact on NO2 at 500 hpa

Convective scavenging of HNO3

Surface O3 simulations