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The Houston-Galveston Area (HGA) is classified as one of the nation's non-attainment areas due to high ground-level ozone concentrations. Several air quality modeling studies are actively being carried out to find cost-effective measures for improving air quality in the region. One essential part of the modeling input data, the emissions inventory (EI), should be processed though emissions modeling systems like SMOKE (Sparse Matrix Operator Kernel for Emissions) and EPS2 (Emissions Preprocessing System version 2) for use in air quality models such as CMAQ (Community Multiscale Air Quality) and CAMx. To study air quality in HGA, both the National EIs from U.S. EPA such as NET96 (National Emissions Trend for 1996) and NEI99 (National Emissions Inventory for 1999) and the State EI from Texas Commission on Environmental Quality (TCEQ) are currently available. |
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Data sources: 1) National – Calculated based on U.S. EPA NEI 1999 final version 2, 2) State – TCEQ documents (available at ftp://ftp.tnrcc.state.tx.us/pub/OEPAA/ TAD/Modeling/HGAQSE/Modeling/Doc/ TSD_PHASE1/attachment3-emissions_inventory.pdf ), 3) Parenthesis presents regular case emissions. |
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The below is database used for emissions procssing except emissions inventory.
For spatial allocation of county-based emissions, GIS emission shape files are downloaded from U.S. EPA (ftp://ftp.epa.gov/EmisInventory/emiss_shp/), and then processed with SMOKE Tool or MIMS (Multi-scale Integrated Modeling System) Spatial Allocator
The same emissions inventory processed with different emission processing models such as EPS2 and SMOKE may present different model-ready emissions because they are largely dependent on the cross-reference and profile data used for spatial and temporal allocations, and chemical speciation. To compare the results after processing of Texas emissions inventory with both EPS2 and SMOKE, the cross-reference and profile files for EPS2 were downloaded from the TCEQ web site. SMOKE used the default cross-reference and profiles for chemical speciation and spatial/temporal allocation.
GloBEIS3 and BEIS3 require different land use and land cover (LU/LC) data for the estimations of biogenic emissions. For the GloBEIS3 processing the Texas LU/LC data was downloaded from TCEQ’s web site, and for the BEIS3 processing U.S. EPA’s BELD3 (Biogenic Emissions Land use Data) is used.
MM5/MCIP output data are used for SMOKE/BEIS3 processing. Selectively, TCEQ's temperature and PAR for GloBEIS3 are also used. |
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Copyright (c) 2004 IMAQS at UH. All rights reserved.
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Emission shape data