Emissions Preprocessing System – EPS2.0.

The Emissions Preprocessing System EPS2.0. performs intensive data manipulations necessary to adapt the emissions inventories for the photochemical modeling use.
The existing emissions inventories contain:

1. annual average or daily emissions rates;
2. emissions for criteria pollutant (NOx, SOx, volatile organic compound etc);
3. location data of each source of pollutants.

The modeling emissions input data MUST contain:

1. chemical resolution – emissions for each chemical species employed by the chemical modeling;
2. temporal resolution – for a hour-by-hour simulation;
3. spatial resolution – emissions for each grid cell of the modeling domain.

EPS2.0. consists of a series of FORTRAN modules that incorporate the spatial, temporal and chemical resolution into an emissions inventory used for the photochemical model.

EPS2.0. modules can be classified into two groups: a) core EPS2.0. modules; b) utilities.

There are 10 core EPS2.0. modules; the first three are called the entry modules, since they prepare the the point , link-based and area source emissions for further processing. This three entry core modules are:

• PREPNT (for point sources);
• PREAM (for area and non-road sources);
• LBASE (for link-based sources).

The next seven core modules are:

• CNTLEM – adjusts emissions levels to reflect the effects of the implementation of proposed controls;
• CHMSPL – assigns input emissions to chemical species expected by the chemical mechanism;
• TMPRL – temporally adjusts emissions from annual, seasonal or typical season day to episodic levels; adjusts motor vehicle emissions for hourly temperature; allocates emissions to the hours of the modeling episode;
• GRDEM – spatially allocates emissions based on source location, link location, or gridded spatial surrogate indicators;
• MRGUAM – merges emissions from several area, low-level point and mobile sources;
• PSTPNT – generates the elevated emissions file required by the UAM preprocessor, PSTRCE;
• RPRTEM – summarizes emissions totals for the modeling region by various categorizations.

There are also 10 utilities for EPS2.0., which can be classified into three groups:
a) input preparation utilities

• BEAFAC – generates the growth factors file;
• EMSCVT – generates the SCC(ASC)/speciation profiles cross reference file and the carbon-bond split factors file;
• MKGLOS – direct access reporting code glossary file;
• MVADJ – motor vehicle adjustment factors file;
• TMPFAC – SCC(ASC)/temporal profiles cross reference file and temporal profiles file.

b) support utilities to manipulate the internal record format:

• EMBRET – converts the data from the binary format to the ASCII format;
• ATOBR – converts the data from the ASCII format to the binary format.

c) reporting utilities:

• QCEMBR – provides tabular summaries of the emissions data;
• RPRTEM – provides tabular summaries of the total emissions from up to six EMBR files;
• MRGEMBR – merges several EMBR files