BC Sensitivity Modeling Results
CAMx Base 2011 version A GEOS-Chem Boundary Condition Simulation
Introduction
We ran a CAMx sensitivity simulation derived from the 3SAQS 2011 Base version A CAMx (CAMx_3SAQS_Base11a) configuration in which we replaced the MOZART Initial and Boundary Conditions (ICBCs) with GEOS-Chem results. The CAMx 2011 GEOS-Chem ICBC sensitivity simulation (CAMx_3SAQS_Base11a_GCBC) is a boundary condition sensitivity to evaluate the change in model performance resulting from ICBCs downscaled from alternative Global Chemical-Transport Models (GCTMs). Other than the ICBC data, the configurations of the Base11a and Base11a_GCBC simulations are exactly the same.
The Base11a_GCBC simulation was instrumented to use the CAMx PM Source Apportionment Tool (PSAT) for tracking O3 and dust species from the five model boundaries (N, S, E, W, and top). Cursory model performance evaluation results, comparison to the Base11a simulation, and the PSAT O3 and dust tracers are presented below.
Results
Table 1. Animations of Daily Max Concentrations and Base11a_GCBC - Base11a differences in Daily Max Concentrations
Scatter Plots
Daily Max O3 Base11a_GCBC vs Base11a
Daily Max MDA8 O3 Base11a_GCBC vs Base11a
Timeseries Plots
January MDA8 O3 at all CO CASTNet Sites
January MDA8 O3 at all CO AQS Sites
January MDA8 O3 at all UT CASTNet Sites
January MDA8 O3 at all UT AQS Sites
January MDA8 O3 at all WY CASTNet Sites
January MDA8 O3 at all WY AQS Sites
Table 2. Animations of Daily Max Concentrations for O3 and Dust Boundary Tracers
| Month | Total BCs | West | East | North | South | Top |
|---|---|---|---|---|---|---|
| January | O3 Dust | O3 Dust | O3 Dust | O3 Dust | O3 Dust | O3 Dust |
| February | O3 Dust | O3 Dust | O3 Dust | O3 Dust | O3 Dust | O3 Dust |
