Point of Contact: McDonald, Brian E-mail: brian.mcdonald@noaa.gov Phone: (303) 497-5094 NOAA Chemical Sciences Laboratory (CSL), Boulder, CO -----------------Inventory Description----------------------------------------- The inventory presented here is developed from the US Environmental Protection Agency's National Emissions Inventory for 2017 (NEI 2017). It is generated using a custom codebase adapted from the Sparse Matrix Operater Kernal Emissions Processing System (SMOKE), which has previously been used in numerous publications (listed at the bottom). The emissions geneated here are from area sources and point sources only and do not include onroad and non-road emissions. The emissions have been grouped by oil and gas end-use sectors and other anthropogenic emissions. The SCC codes corresponding to each grouping of emissions are noted in the excel file provided here (EPA_NEI2017_SCC_aggregation_EasternUS_OG_enduse.xlsx) Emissions estimates are provided in netCDF format and projected on the standard NEI continental US model grid, with a grid resolution of 4km x 4km. Emissions estimates for all reported species are in metric tons/hr, except for individual VOC species (those with names formatted as HC##) which are provided in moles/hr. Files are separated into representative days of weekdays, Saturdays, and Sundays for each month. Emissions files for a given day are provided as two separate 12-hour files in UTC times. Mapping of hydrocarbon species in our inventory onto the SAPRC Mechanism are below: Bin SAPRC -------------- HC01 CH4 HC02 ALK1 HC03 ALK2 HC04 ALK3 HC05 ALK4 HC06 ALK5 HC07 ETHENE HC08 OLE1 HC09 OLE2 HC10 ISOPRENE HC11 TRP1 HC12 ARO1 HC13 ARO2 HC14 HCHO HC15 CCHO HC16 RCHO HC17 BALD HC18 ACET HC19 MEK HC20 PROD2 HC21 MEOH HC22 GLY HC23 MGLY HC24 BACL HC25 PHEN HC26 CRES HC27 METHACRO HC28 MVK HC29 ISOPROD HC30 HCOOH HC31 CCO_OH HC32 RCO_OH HC33 XYLENEOLS HC34 CATECHOLS HC35 NVOL HC36 PROPYLENE HC37 ACETYLENE HC38 BENZENE HC39 BUTANES HC40 PENTANES HC41 TOLUENE HC42 M-XYLENE HC43 O-XYLENE HC44 P-XYLENE HC45 PROPANE HC46 DIENES HC47 STYRENES HC48 ETHANOL HC49 ETEG HC50 UCM Mapping of particulate species in our inventory onto the SAPRC Mechanism are below: Bin SAPRC -------------- PM01 PMFINE PM02 PSO4 PM03 PNO3 PM04 POC PM05 PEC PM06 PNCOM PM07 PNH4 PM08 PAL PM09 PCA PM10 PFE PM11 PH2O PM12 PMG PM13 PMOTHR PM14 PK PM15 PMN PM16 PCL PM17 PNA PM18 PTI PM19 PSI For more information see: 1. He J, Harkins C, O'Dell K, Li M, Francoeur C, Aikin K, Anenberg S, Baker B, Brown SS, Coggon MM, Frost GJ, Gilman JB, Kongdragunta S, Lamplugh A, Lyu C, Moon Z, Pierce B, Schwantes RH, Stockwell CE, Warneke C, Yang K, McDonald BC. (2024). COVID-19 perturbation on US air quality and human health impact assessment. PNAS Nexus. 3 (1). https://doi.org/10.1093/pnasnexus/pgad483 2. McDonald, B. C., McKeen, S. A., Cui, Y. Y., Ahmadov, R., Kim, S.-W., Frost, G. J., Pollack, I. B., Peischl, J., Ryerson, T. B., Holloway, J. S., Graus, M., Warneke, C., Gilman, J. B., de Gouw, J. A., Kaiser, J., Keutsch, F. N., Hanisco, T. F., Wolfe, G. M., & Trainer, M. (2018). Modeling Ozone in the Eastern U.S. using a Fuel-Based Mobile Source Emissions Inventory. Environmental Science & Technology, 52(13), 7360–7370. https://doi.org/10.1021/acs.est.8b00778 3. Li, M., McDonald, B. C., McKeen, S. A., Eskes, H., Levelt, P., Francoeur, C., Harkins, C., He, J., Barth, M., Henze, D. K., Bela, M. M., Trainer, M., de Gouw, J. A., & Frost, G. J. (2021). Assessment of Updated Fuel-Based Emissions Inventories Over the Contiguous United States Using TROPOMI NO2 Retrievals. Journal of Geophysical Research: Atmospheres, 126(24), e2021JD035484. https://doi.org/10.1029/2021JD035484