Combo Model Accomplishments : G4AGCMTurned on:

Clouds, Variable UV AlbedoAdded:

Tropospheric Aerosols*, Shipping Emissions*Numerous Output Options, Variable CH4 BC

Modified:Un-Hardwired Setkin Files + More*

Changed:Philip Cameron-Smith’s pressure fixer

Simulations Completed & Stored on Dirac:4x5 & 2x2.5 G4AGCM 5-yr

Didn’t Do Yet:Tropopause Definition, Mesospheric Chemistry,More Complete Shipping Emissions (Eyring)

*Done for Tropospheric Model too.*Done for Tropospheric Model too, but not in latest runs.

Evaluation of Combo : G4AGCM

Bryan, Jerry Ziemke, Sushil ChandraTropospheric O3 Column : OMI/MLSTotal O3 Column : TOMS

BryanUT/LS O3, HCl : OMI/MLS

SusanAge of Air : Aircraft DataUT/LS O3 : ER2

JenniferTropospheric, UT/LS O3 : Ozonesondes

DavidUT/LS O3 : Ozonesondes

September 2004 -August 2005

1994-1998 G4AGCMaverage

Plots from Ziemkeet al., 2006

Trop Height : NCEP ~ G4agcm met defSynoz def = wacky

ModelBiasedHigh inNH mid-Lats

ModelBiasedHigh inboth mid-Lats

TOMS AI?

GMI CO wacky :no CO2 + hv

FVGCM Mean Age, 28 levs (WMO)

-50 0 50LAT

100

10

1

PR

ES

0.5

1.01.5

2.02.5

3.03.54.0

4.5

5.0

5.0

5.55.5

FVDAS Mean Age, 28 levs (WMO)

-50 0 50LAT

100

10

1

PR

ES

0.5 1.01.5

2.0

2.5

3.0

3.5

3.5

FVGCM (5-yrs) Mean Age, 42 levs

-50 0 50LAT

100

10

1

PR

ES

0.5

1.01.5

2.02.5

3.03.

03.53.54.0

4.0

Age from Aircraft CO2 and Models

-50 0 50LAT

0

1

2

3

4

5

6

7

Age

(Y

rs)

Mean Age from 20-year Simulations

FVGCM 28-lev (black), FVDAS 28-lev (red), FVGCM 42-lev (blue)

Stratospheric CH4 min (Feb. 0.73mb) = 223 ppbvO3 max = 9.8 ppmv

Precipitation reasonable vs GPCP

Miscellaneous Stuff