CMAQ-DDM and CMAQ-ISAM Sensitivity Data used for Profile Optimization

Sensitivity data (ASENS outputs from CMAQ-DDM and SA_ACONC outputs from CMAQ-ISAM) used to create optimized source profiles for speciated PM2.5 at 11 sites in the Western United States: Site Name State AQS Site ID Latitude Longitude Elevation (m) Population Bakersfield CA 06-029-0014 35.356092 -119.041209 123 403,455 Boise ID 16-001-0010 43.600699 -116.3478530 823 235,684 Bountiful UT 49-011-0004 40.902967 -111.8844670 1333 45,762 Denver CO 08-031-0002 39.7511840 -104.9876250 1611 715,552 Fresno CA 06-019-0011 36.785322 -119.774174 95 542,107 Hawthorne UT 49-035-3006 40.736389 -111.8722220 1293 199,723 Las Vegas NV 32-003-0540 36.1415384 -115.0820978 718 641,903 Modesto CA 06-099-0005 37.642165 -120.9942120 27 218,464 Reno NV 32-031-0016 39.525083 -119.8077170 1500 264,165 Sacramento CA 06-067-0006 38.613779 -121.368014 8 524,943 Visalia CA 06-107-2002 36.332179 -119.291228 97 141,384 The CMAQ-DDM model had 24-hour averaged data available for only 2016-01-01, but CMAQ-ISAM outputs are provided for all days in January 2016 when the corresponding location had Chemical Speciation Network (CSN) data available (varies by site). Both CMAQ-DDM and CMAQ-ISAM simulations were run using CMAQv5.4 with the cb6r5_ae7_aq gas-phase chemical mechanism and meterology input data discussed in Phelan et al. (ACS EST Air 2025, 2, 2, 162–174). Individual files are provided for each site, model, and simulation date. The 19 source categories used for separation of emissions in the models were: Category name Description of included sources AG Agricultural activities and livestock operations AIR Aircraft operations BIO Biogenics COA Coal combustion DUS Dust FOI Fuel oil combustion MET Metals processing NDE Non-road diesel combustion NG Natural gas combustion NGA Non-road gasoline NRO Non-road combustion of other fuels ODE On-road diesel combustion OGA On-road gasoline combustion ORO On-road combustion of other fuels OTH All other sources RAL Rail operations RWC Residential wood combustion SHP Marine shipping operations SOL Solvent use CMAQ-simulated PM25_UNSP (Unsp. in the provided data) sensitivities were split into sensivitities for Cu, Zn, As, Se, Br, Sn, Sb, Ba, and Pb (PM2.5 species that are not modeled in CMAQ directly) using the appropriate portion of the seed profile used in the monlinear optimization process.