1 Two-Dimensional Chemistry Transport Model 11/16/2006.

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Presentation transcript:

1 Two-Dimensional Chemistry Transport Model 11/16/2006

2 Overview  Offline 2-D CTM (Caltech/JPL Kinetics model)  ThinAir Model (Two-and-a-Half-dimesional INter-Active Isentropic Research model, J. Kinnersley and K. K. Tung)  Discussion

3 Continuity Equation for Chemical Species (Morgan et al. 2004) 1.Advection (V and W or Streamfuction) 2. Eddy Diffusion (Kyy) 3. Vertical Diffusion (Kzz) 4. Chemical Sources and Sinks 5. Resolution and Vertical Coordinate 6. Numeical Scheme and Time Spliting

4 Interactive 2-D CTM 1.Dynamics Model 2.Radiation code 3.Chemistry Transport Model 4.Interactions between the three Modules

5 ThinAir Model 1.Isentropic Coordinate 2.Two and a Half Dimensional Dynamics Model (zonally averaged dynamics plus three longest planetary waves) 3.Planetary Wave Breaking Parameterization for Kyy 4.Gravity Wave Breaking Parameterization for Kzz

6 ThinAir Model 5. Radiation (J. Haigh, 1984): UV and Visible (O3 and O2) NIR (H2O, CO2, O2, CH4 and N2O) IR (H2O, CO2 and O3)

7 ThinAir Model 6. Chemistry: 45 Species Rate Data from DeMore et al. (1992) PSC Parameterization and Heterogeneous Reactions

8 ThinAir Model 7. QBO-Source Term in the Momentum Equation: Wave Parameterization (Kinnersley, 1996b) Kelvin Waves and Rossby-Gravity Waves or Relaxation to Observed QBO (Singapore, 80-93) Winds (Kinnersley, 1998)

9 Discussions 1. Climatology (Kinnersley, 1996) 2. Modification and Updating: Adding Solar Cycle QBO data and Lower Boundary Condition for Planetary Waves Extended to The use of ThinAir