Emissions Modeling Clearinghouse

The Emissions Modeling Clearinghouse (EMCH) has been designed to support and promote emission modeling activities both internal and external to EPA. Through this site the EPA intends to distribute emissions model input formatted inventories based on the latest versions of its National Emission Inventory databases. In addition to the emissions data, this site will be used to document and distribute the Agency's latest versions of the ancillary files used to support the temporal, spatial, speciation, and projection of these emissions. Although numerous links to other sources of emissions, modeling factors, and emissions models are available through this site, the EPA does not actively support the use of any one inventory, set of factors, or emissions models for input development to air quality modeling.

Site Directory

2002 Based Modeling Platform

2001 Based Modeling Platform

Emissions modeling software tools

Emissions modeling ancillary data (Non-inventory data)

2002-Based Modeling Platform

This platform includes emissions data and tools that are in development for supporting future EPA analyses. This platform will include support of both criteria air pollutants (CAPs), mercury, and other hazardous air pollutants (HAPs) to prepare emissions for air quality models.

Disclaimer: The data available at this time are not necessarily the final data for the 2002-based platform. EPA may choose to create another version of the 2002 platform at a later time, without notice.

CAP 2002-Based Platform, Version 3

Documentation

Data Files (last updated 1/17/2008)

2002 NEI, version 3 for CAPs in SMOKE input format
All emissions modeling ancillary data files for base-year CAP processing that work with the 2002 v3 NEI, excluding meteorology data. These files are provided in SMOKE-ready format only at this time
2009, 2014, 2020 and 2030 emissions data

Microsoft Excel summary files with both 2002 and future years included
Custom SMOKE run scripts

At this location, we also plan to post the following additional information:

Emissions modeling ancillary files in CSV format

We also plan to post additional future-year data for 2009 and 2014, but a schedule has not yet been set for these.

Mercury-only 2002-Based Platform, Version 3

Documentation (in progress)
Data Files (last updated 1/17/2008)

CAP NEI files are the same as the CAP-only platform and should be obtained from the CAP 2002-Based Platform, Version 3 described above.
2002NEI, version 3 for mercury, chlorine, and hydrochloric acid (HCI) in SMOKE "ORL" input format. These are the polluntants needed for supporting mercury modeling with the current version of the CMAQ model.
There are no additional ancillary files for this case. All ancillary files to process these emissions should be obtained from the CAP and HAP 2002-Based Platform, Version 3, described below.

CAP and HAP 2002-Based Platform, Version 3

Documentation (in progress)
Data Files (last updated 1/17/2008)

CAP NEI files are the same as the CAP-only platform and should be obtained from the link above
2002 NEI, version 3 for HAPs
All 2002 SMOKE ancillary data files for base-year CAP-HAP needed in addition to the files provided with the CAP-only platform, excluding meteorology data.

Custom SMOKE run scripts

2001-Based Modeling Platform

The 2001 modeling platform includes emissions data (but not tools) that were used for previous EPA analyses, as listed below for each platform. Version 2 of this platform supports only CAP emissions, while Version 1 supports both CAPS and mercury.

CAP 2001-Based Platform, Version 2

Includes 2001 and future baseline emissions data used for the EPA analyses shown below. These data files generally do not include rule-specific emissions files for rule-specific base case runs or control strategies. The complete list of rules and RIAs using this version of the platform is:
          - Regulatory Impact Analysis for Final PM NAAQS
          - Regulatory Impact Analysis for Proposed 03 NAAQS
          - Locomotive Marine Rule Proposal (EPA Office of Transportation and Air Quality)
          - Analysis of Clean Diesel programs (EPA Office of Transportation and Air Quality)
          - Section 753 Report of the 2005 Energy Policy Act.

Documentation
This platform has been documented in Chapters 1 and 2 of the PM NAAQS Regulatory Impact Assessment, which is available online at http://www.epa.gpv/ttn/ecas/ria.html.
Data Files (last updated July 2007)

2001 NEI for CAPs in SMOKE "IDA" input format
All emissions modeling ancillary data files for base-year CAP processing that work with the 2001 NEI, excluding meteorology data. These files are provided in SMOKE-ready format only at this time.
2015 and 2020 inventories in SMOKE "IDA" input format.

Data Files in support of 03 NAAQS Proposal RIA

2020 Base Case inventory data files specific to 03 NAAQS Proposal RIA

CAP and Hg 2001-Based Platform, Version 1

Includes 2001 and future baseline emissions as well as SMOKE ancillary data. These data were used for the following analyses.
          - Clean Air Interstate Rule (CAIR)
          - Clean Air Mercury Rule (CAMR)
          - Clean Air Visibility Rule (CAVR), commonly known as the "BART" rule
          - Clear Skies Legislation analysis
          - Control of Emissions from Onroad Spark-Ignition Engines and Equipment, Proposed Rule             (EPA Office of Transportation and Air Quality)

Documentation

The CAP part of this platform has been documented in the CAIR Emissions Inventory Technical Support Document
The Mercury part of this platform has been documented in the CAMR Emissions Inventory TSD, called Emissions Inventory and Emissions Processing for the Clean Air Mercury Rule.

Data Files:

The data files for the CAP part of the platform are available using a password-protected FTP site, Login and password can be obtained from Peter Eckhoff at eckhoff.peter@epa.gov.
Mercury data, based on 1999 National Emission Inventory.

Emissions Modeling Ancillary Data

Latest release ancillary files

Smoke format

CSV format

Related Links to Emissions Modeling Resources

Training Course - Preparation of Emission Inventories for Modeling

Community Modeling and Analysis System (CMAS) Center

The Modeling and Analysis System (CMAS) is an approach for supporting community-based air quality modeling. The CMAS Center distributes and supports features of VMAS for the global modeling community. Its activities include an on-line help desk, model clearinghouse, training, conferences, development assistance for adding new features for the supported CMAS prodicts, model documentation access, model-related research, and a data clearinghouse.

Sparse Matrix Operator Kernel Emissions (SMOKE) modeling system

Emissions modeling system used by EPA to prepare emissions for input to various air quality models. Includes the BEIS3.13 biogenic emissins model.

Emissions Modeling System (EMS), 2001

Emissions modeling system for preparation of emission inventory data from National Inventory Format (NIF) 3.0 for input to air quaity models. Includes the BIOME3 biogenic emissions.

Consolidated Community Emissions Processing Tool (CONCEPT)

The new and open source CONCEPT Emissions Processor is under development to support the development of State Implementation Plans for fine particles, regional haze, and ozone by state and local agencies.

Hourly Continuous Emissions Monitoring (CEM) data in SMOKE-ready format.

This site contains hourly CEM data prepared for SMOKE version 2.3 and later for all available CEM data.