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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

Monthly Average NMB/Concentration Plots (4-km Domain)

CO at AQS Sites
MDA8 O3 at AQS Sites
MDA8 O3 at CASTNet Sites
Total PM2.5 at IMPROVE Sites
EC at IMPROVE Sites
OC at IMPROVE Sites
SO4 at IMPROVE Sites
NO3 at IMPROVE Sites
NH4 at IMPROVE Sites
Total PM2.5 at CSN Sites
EC at CSN Sites
OC at CSN Sites
SO4 at CSN Sites
NO3 at CSN Sites
NH4 at CSN 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
MarchO3 DustO3 DustO3 DustO3 DustO3 DustO3 Dust
AprilO3 DustO3 DustO3 DustO3 DustO3 DustO3 Dust
MayO3 DustO3 DustO3 DustO3 DustO3 DustO3 Dust
JuneO3 DustO3 DustO3 DustO3 DustO3 DustO3 Dust
JulyO3 DustO3 DustO3 DustO3 DustO3 DustO3 Dust
AugustO3 DustO3 DustO3 DustO3 DustO3 DustO3 Dust
SeptemberO3 DustO3 DustO3 DustO3 DustO3 DustO3 Dust
OctoberO3 DustO3 DustO3 DustO3 DustO3 DustO3 Dust
NovemberO3 DustO3 DustO3 DustO3 DustO3 DustO3 Dust
DecemberO3 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
Table 4. MOZART Concentration Plots

MonthCoarse DustFine Dust
Annual MaxPlotPlot
January Daily MaxPlotPlot
February Daily MaxPlotPlot
March Daily MaxPlotPlot
April Daily MaxPlotPlot
May Daily MaxPlotPlot
June Daily MaxPlotPlot
July Daily MaxPlotPlot
August Daily MaxPlotPlot
September Daily MaxPlotPlot
October Daily MaxPlotPlot
November Daily MaxPlotPlot
December Daily MaxPlotPlot