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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 (12-km domain)

MonthO3NO2COPM2.5NH3SO2
JanuaryDaily Max DiffDaily Max DiffDaily Max DiffDaily Max DiffDaily Max DiffDaily Max Diff
FebruaryDaily Max DiffDaily Max DiffDaily Max DiffDaily Max DiffDaily Max DiffDaily Max Diff
MarchDaily Max DiffDaily Max DiffDaily Max DiffDaily Max DiffDaily Max DiffDaily Max Diff
AprilDaily Max DiffDaily Max DiffDaily Max DiffDaily Max DiffDaily Max DiffDaily Max Diff
MayDaily Max DiffDaily Max DiffDaily Max DiffDaily Max DiffDaily Max DiffDaily Max Diff
JuneDaily Max DiffDaily Max DiffDaily Max DiffDaily Max DiffDaily Max DiffDaily Max Diff
JulyDaily Max DiffDaily Max DiffDaily Max DiffDaily Max DiffDaily Max DiffDaily Max Diff
AugustDaily Max DiffDaily Max DiffDaily Max DiffDaily Max DiffDaily Max DiffDaily Max Diff
SeptemberDaily Max DiffDaily Max DiffDaily Max DiffDaily Max DiffDaily Max DiffDaily Max Diff
OctoberDaily Max DiffDaily Max DiffDaily Max DiffDaily Max DiffDaily Max DiffDaily Max Diff
NovemberDaily Max DiffDaily Max DiffDaily Max DiffDaily Max DiffDaily Max DiffDaily Max Diff
DecemberDaily Max DiffDaily Max DiffDaily Max DiffDaily Max DiffDaily Max DiffDaily Max Diff

Scatter Plots (4-km Domain)

Daily Max O3 Base11a_GCBC vs Base11a
Daily Max MDA8 O3 Base11a_GCBC vs Base11a

Timeseries Plots (4-km Domain)

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

MonthTotal BCsWestEastNorthSouthTop
JanuaryO3 DustO3 DustO3 DustO3 DustO3 DustO3 Dust
FebruaryO3 DustO3 DustO3 DustO3 DustO3 DustO3 Dust
Table 3. Boundary conditions plots

MonthO3Ox (O3+NO+NO2+PAN)Coarse Dust (CCRS)Fine PM Other (FPRM+FCRS)
JanuaryPlotPlotPlotPlot
FebruaryPlotPlotPlotPlot
MarchPlotPlotPlotPlot
AprPlotPlotPlotPlot
MayPlotPlotPlotPlot
JunePlotPlotPlotPlot
JulyPlotPlotPlotPlot
AugustPlotPlotPlotPlot
SeptemberPlotPlotPlotPlot
OctoberPlotPlotPlotPlot
NovemberPlotPlotPlotPlot
DecemberPlotPlotPlotPlot