TwoDimensional Chemistry Transport Model

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Two-Dimensional Chemistry Transport Model
11/16/2006
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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

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Continuity Equation for Chemical Species (Morgan
et al. 2004)

• 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

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Interactive 2-D CTM

• Dynamics Model
• Radiation code
• Chemistry Transport Model
• Interactions between the three Modules

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ThinAir Model

• Isentropic Coordinate
• Two and a Half Dimensional Dynamics Model
  (zonally averaged dynamics plus three longest
  planetary waves)
• Planetary Wave Breaking Parameterization for Kyy
• Gravity Wave Breaking Parameterization for Kzz

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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)
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ThinAir Model
6. Chemistry 45 Species Rate Data from
DeMore et al. (1992) PSC Parameterization and
Heterogeneous Reactions
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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)
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Discussions
1. Climatology (Kinnersley, 1996) 2.
Modification and Updating Adding Solar
Cycle QBO data and Lower Boundary Condition
for Planetary Waves Extended to 2005 3. The use
of ThinAir