* General Notes - The various directories and sub-directories within this folder contain emissions inventory component files that are subsequently merged for photochemical model input. - For photochemical modeling applications, the TCEQ currently uses the Comprehensive Air Quality Model with Extensions (CAMx), which is available at http://www.camx.com/. - The files currently included under this parent directory are for the following ozone episodes developed by the Texas Commission on Environmental Quality (TCEQ): - 2006 episodes from May 31-July 2 (33 days) and August 13-September 15 (34 days). - 2012 five monthly episodes from May 1-September 30 (153 days). - The complete set of CAMx inputs (i.e, merged emissions, meterological, boundary conditions, etc.) developed by TCEQ for these episodes are available at: - https://www.tceq.texas.gov/airquality/airmod/data/tx2006/ for the 2006 episodes. - https://www.tceq.texas.gov/airquality/airmod/data/tx2012/ for the 2012 episodes. - Any file of interest should be downloaded and archived to an individual's or organizations's own computer system because the files cannot be stored indefinitely. - The files and data sets available here were developed with the latest available tools and data sets at the time the work was done. * Episode Directory Structure - Within the /dfw_sip/2006_episodes/ directory are sub-directories for: - /base_2006/ that contains 2006 base year component files that were used for the Dallas-Fort Worth (DFW) area attainment demonstration State Implmentation Plans (SIPs) adopted on June 3, 2015 and July 6, 2016. - /future_2017/ that contains 2017 future year component files for the DFW attainment SIP adopted on July 6, 2016, which is available at https://www.tceq.texas.gov/assets/public/implementation/air/sip/sipdocs/2016-AD-DFW/DFWAD_2016_archive.pdf. - /future_2018/ that contains 2018 future year component files for the DFW attainment SIP adopted on June 3, 2015, which is available at https://www.tceq.texas.gov/assets/public/implementation/air/sip/sipdocs/2015-AD-RFP-DFW/DFWAD_2015_archive.pdf. - The TCEQ is no longer updating files for the 2006 episodes, so the various files included within the /2006_episodes/ directory will not change. - Within the /hgb_sip/2012_episodes/ directory are sub-directories for: - /base_2012/ that contains 2012 base year component files for the Houston-Galveston-Brazoria (HGB) area attainment demonstration SIP that was adopted on December 15, 2016. - /future_2017/ that contains 2017 future year component files for the HGB attainment SIP that was adopted on December 15, 2016, which is available at https://www.tceq.texas.gov/assets/public/implementation/air/sip/hgb/HGB_2016_AD_RFP/AD_Adoption/16016SIP_HGB08AD_ado.pdf. * Emission Source Type Directory Structure - Within the directory for each base year or future year are sub-directories for the following aggregated emission source types: - /area/ - /nonroad/ - /offroad/airport/ - /offroad/locomotive/ - /offroad/marine/ - /oil_gas/ - /onroad/ - /point/ Geographical Area Directory Structure - Within each of the non-point source type directories are sub-directories for one or more geographical areas within the North American modeling domain: - /all/ refers to merged components for the entire modeling domain (currently only included under /onroad/). - /can/ refers to the southern portion of Canada included within the modeling domain. - /dfw/ refers to the Dallas-Fort Worth (DFW) area (currently only included under /onroad/). - /gom/ refers to the Gulf of Mexico (currently only included under /oil_gas/). - /hgb/ refers to the Houston-Galveston-Brazoria (HGB) area (currently only included under /onroad/). - /mex/ refers to the northern portion of Mexico included within the modeling domain. - /tex/ refers to either all 254 Texas counties or the non-DFW and non-HGB portions of Texas when there are separate directories for those areas (such as with /onroad/). - /usa/ refers to the non-Texas continental U.S. portions of the modeling domain (excludes Alaska and Hawaii). Emission Processing Nomenclature - The TCEQ curently uses version 3 of the Emissions Processor System (EPS3) to prepare the anthropogenic modeling emissions for CAMx input. - More information about EPS3 can be found within ftp://amdaftp.tceq.texas.gov/pub/EI/EPS3/. - Most of the packages that contain large numbers of files within the subdirectories are tarred and compressed with a "...tar.gz" extension. - In such instances, there is usually a "...tar.txt" file that lists the contents of the "...tar.gz" file that can be reviewed prior to downloading. - Many of the files include a date code at the end indicating when they were processed, merged, or posted to the FTP site. The format is for year, month, and date in the sequence of yymmmdd. - If users only want the CAMx-ready inputs that can be merged for each source type, they should download the following file packages: - "grdem...tar.gz" for low-level output from the EPS3 GRDEM module (will apply to most source types). - "mrguam...tar.gz" for low-level output from the EPS3 MRGUAM module that contains multiple merged GRDEM output files (currently only applies to the onroad source type under the /onroad/all/ directory). - "pstpnt...tar.gz" for elevated output from the EPS3 PSTPNT module used for point sources with emissions from tall stacks. - "pstshp...tar.gz" for elevated output from the EPS3 PSTSHP module used for some portions of the commercial marine source type. - If users wish to recreate the full EPS3 processing streams for individual source types and/or geographic areas, they should download the following file packages: - "afs_inputs...tar.gz" for the AIRS Facility Subsystem (AFS) format associated with point sources for input to the EPS3 PREPNT module. - "ams_inputs...tar.gz" for the AIRS Area and Mobile Source (AMS) format associated with most source types for input to the EPS3 PREAM module. - "preshp_inputs...tar.gz" for shipping lane emissions input to the EPS3 PRESHP module. - "eps3_msg...tar.gz" file packages that document the full EPS3 processing sequence with various message and reference files for combinations of source type and geographic area. - LBASE, PREAM, PREFIR, PREPNT, and PRESHP are the EPS3 "entry" or "starting-point" modules. - GRDEM, PSTFIR, PSTPNT, and PSTSHP are the EPS3 "exit" or "finishing-point" modules, whose output is ready for input to CAMx. - MRGRUAM and PIGEMS are the EPS3 "merge" modules used for combining multiple low-level and elevated emission files, respectively, for CAMx input. - If lost or confused, users should look at a message output file from a "downstream" module such as GRDEM, MRGAUM, or PSTPNT and then backtrack to see the appropriate module sequence, reference files used, input parameters, etc. Modeling Domains - The emissions are processed at resolutions of 4 kilometers (km), 12 km, and 36 km for the following modeling domains: - tx_4km that covers most of Eastern Texas and small portions of Arkansas, Louisiana, Oklahoma, and Mexico. - tx_12km that covers all of Texas, Arkansas, Louisiana, and Oklahoma along with portions of Colorado, Kansas, Kentucky, Mississippi, Missouri, New Mexico, Tennessee, and Mexico. - rpo_36km that covers all of the continental U.S. (excludes Alaska and Hawaii), southern Canada, and northern Mexico. - Based on a Lambert Conformal Conic map projection with these parameters: - First True Latitude (Alpha) of 33 degrees North - Second True Latitude (Beta) of 45 degrees North - Central Longitude (Gamma) of 97 degrees West - Projection Origin of 97 degrees West and 40 degrees North - Spheriod of a Perfect Sphere with a Radius of 6370 km - tx_4km domain: - Easting (km) of -328,436 - Northing (km) of -1516,-644 - 191 4 km Easting Cells - 218 4 km Northing Cells - tx_12km domain: - Easting (km) of -984,804 - Northing (km) of -1632,-312 - 149 12 km Easting Cells - 110 12 km Northing Cells - rpo_36km domain: - Easting (km) of -2736,2592 - Northing (km) of -2088,1944 - 148 36 km Easting Cells - 112 36 km Northing Cells Description of Temporal References in Emissions Inventory File Names - fri: Friday (typically estimated only for on-road sources) - osd: Ozone Season Day - sat: Saturday - sch: School (estimated only for on-road sources separate from Summer) - sum: Summer - sun: Sunday - wkd: Weekday (can be based on a Monday-Thursday average for on-road sources or Monday-Friday average for both area and non-road sources) Description of Texas Geographical References in Emissions Inventory File Names - att: Texas Counties in attainment of the ozone standard. - bpa: The Beaumont-Port Arthur area comprised of Hardin, Jefferson, and Orange Counties - btspk_dfw_10co: The DFW portion of the Barnett Shale plus Kaufman County - bts_no_dfw_10co: The non-DFW portion of the Barnett Shale - dfw: Dallas-Fort Worth area - dfw_10co: The 10 DFW nonattainment Counties under the 75 ppb eight-hour ozone standard, which are Collin, Dallas, Denton, Ellis, Johnson, Kaufman, Parker, Rockwall, Tarrant, and Wise - efs: Eagle Ford Shale - etx: Eastern Texas - etx_90co: 90 Counties in Eastern Texas outside of 10-County DFW, 8-County HGB, Hood County, and Hunt County - etx_92co: 92 Counties in Eastern Texas outside of 10-County DFW and 8-County HGB - etx_110co: 110 Counties in Eastern Texas subject to Texas Low Emission Diesel (TxLED) fuel requirements (https://www.tceq.texas.gov/airquality/mobilesource/txled/cleandiesel.html). - hg: Houston-Galveston area - hgb: Houston-Galveston-Brazoria area - hgb_8co: The 8 HGB nonattainment Counties under the 75 ppb eight-hour ozone standard, which are Brazoria, Chambers, Fort Bend, Galveston, Harris, Liberty, Montgomery, and Waller - hh: Hood and Hunt Counties in the greater DFW area - hh_2co: Hood and Hunt Counties in the greater DFW area - hs: Haynesville Shale - pb: Permian Basin - tex: All or parts of Texas - tex_236co: 236 Texas Counties outside of 10-County DFW and 8-County HGB - tex_254co: All 254 Texas Counties - wtx_75co: 75 Western Texas Counties not subject to TxLED that are completely or partially included within the tx_4km modeling domain - wtx_144co: All 144 Western Texas Counties not subject to TxLED Description of Non-Texas Geographical References in Emissions Inventory File Names - all: All North American portions of the tx_4km, tx_12km, and rpo_36km modeling domains - alo: The portions of Arkansas, Louisiana, and Oklahoma within the tx_4km modeling domain - can: Southern portion of Canada within the rpo_36km modeling domain - ctz: Non-Texas U.S. Counties within the Central Time Zone - etz: Non-Texas U.S. Counties within the Eastern Time Zone - gom: Gulf of Mexico - gulf: Gulf of Mexico - mex: Northern portions of Mexico within the tx_4km, tx_12km, and rpo_36km modeling domains - mtz: Non-Texas U.S. Counties within the Mountain Time Zone - notx: Non-Texas U.S. States and Counties. - nous: The non-U.S. Canadaian and Mexican portions of the tx_4km, tx_12km, and rpo_36km modeling domains - ptz: Non-Texas U.S. Counties within the Pacific Time Zone - usa: Non-Texas U.S. States and Counties Description of Emissions Inventory Codes - ar: Area sources - bc: Base case inventory that uses historical hourly emissions by EGU from EPA Air Markets Program Data (https://ampd.epa.gov/ampd/) - bl: Baseline inventory that averages EGU emissions by month for the relative response factor attainment test - cmv: Commercial marine vessels - dflt: Default that typically applies to default runs of the MOVES model for non-Texas U.S. States - drilling: Oil and gas emissions from drilling activity separate from production. - drillrigs: Oil and gas emissions from drilling activity separate from production. - egu: Electric generating unit - el: Elevated emissions from tall stacks separate from low-level emissions at the surface. - gse: Ground support equipment at airports - gwei: Gulf-wide emissions inventory for the Gulf of Mexico - harbor: Harbor vessel portion of commercial marine activity - hpms: Highway Performance Monitoring System, which is the source of transporation activity for Texas Counties when a link-based on-road inventory is not developed from travel demand model output - idle: Extended idling emissions from the "eighteen-wheeler" diesel combination long-haul source use type from the MOVES model - link: On-road emissions estimated by individual roadway segment or "link" from a travel demand model - lo: Low-level emissions at the surface rather than elevated emissions from tall stacks - loco: Locomotive emissions from both line-haul and switcher activity - linehaul: Locomotive line-haul emissions separated into Class I and Class II categories. - m6cn: MOBILE6-Canada used to estimate on-road emissions for Canada - m6mx: MOBILE6-Mexico used to estimate on-road emissions for Mexico - mv: Motor vehicle - mvs: Motor Vehicle Emission Simulator (MOVES) model from EPA used to estimate both on-road and non-road emissions (https://www3.epa.gov/otaq/models/moves/) - mvs14: 2014 version of MOVES initially released in July 2014 - mvs14a: November 2015 update to MOVES2014 - nearport: Commercial marine emissions near ports - nei: National Emissions Inventory from EPA (https://www.epa.gov/air-emissions-inventories/national-emissions-inventory) - nmim: National Mobile Inventory Model from EPA previously used for developing non-Texas non-road emissions (https://www3.epa.gov/otaq/nmim.htm) - nonegu: Point sources that are not EGUs - nonplatform: Gulf of Mexico emissions associated with non-platform activity - nr: Non-road sources - nr08a: 2008a version of EPA's NONROAD model (https://www3.epa.gov/otaq/nonrdmdl.htm) - offn: Off-network or "non-roadway" emissions estimated with MOVES for vehicle start emissions, evaporation from parked vehicles, etc. - offshore: Coastal oil and gas production that is not land-based - oilgasp: Oil and gas emissions from production rather than drilling activity - platform: Gulf of Mexico emissions associated with stationary platform activity - production: Oil and gas emissions from production rather than drilling activity - pt: Point sources. - rflg: At-the-pump refueling emissions from motor vehicles. - ships: Commercial marine vessels - steem: North American commercial marine vessel emissions estimated from the Ship, Traffic, Energy, and Environment Model (http://coast.cms.udel.edu/NorthAmericanSTEEM/) - switcher: Locomotive emissions from railyard switcher engines rather than line-haul activity - tdm: Travel demand model for estimating vehicle miles traveled by individual roadway segments in metropolitan areas - texaer: Texas Air Emissions Repository (https://www.tceq.texas.gov/airquality/areasource/TexAER.html) that is the source of area source emission inventories for projection benchmark years such as 2011, 2014, etc. - texn: Texas NONROAD model for estimating non-road emissions for 254 Texas Counties (ftp://amdaftp.tceq.texas.gov/pub/EI/nonroad/TexN/) - texn161: Version 1.6.1 of TexN - texn171: Version 1.7.1 of TexN - vmt: Vehicle miles traveled from on-road motor vehicles * Additional Questions - If you have additional questions about the files within these directories, please contact the TCEQ Air Modeling and Data Analysis (AMDA) Section by sending an e-mail to amda@tceq.texas.gov. - So that we can route your request more quickly to the appropriate staff person, please put a general summary of the emissions inventory topic in the subject line and a detailed description in the e-mail.