NMIM and MOVES Runs for RFS2 Air Quality Modeling: Memorandum

Harvey Michaels, OTAQ

January 12, 2010

The models and scripts used to run and process NMIM and MOVES for the
RFS2 FRM air quality modeling have been docketed on a DVD entitled
“NMIM and MOVES Runs for RFS2 Air Quality Modeling: DVD.”  This memo
describes the contents of the DVD and provides an overview of how these
models were used to generate the onroad and nonroad downstream
inventories.

Memorandum (this document)

Title: “NMIM and MOVES Runs for RFS2 Air Quality Modeling:
Memorandum” 

Filename: RFS2_NMIM_MOVES_AQM.pdf

DVD

Title: “NMIM and MOVES Runs for RFS2 Air Quality Modeling: DVD”,
written on the physical DVD.

Volume Label:  RFS2 NMIM MOVES AQM

This memo is not on the DVD.

Contents of the DVD

MOVES folder

Batch Files_20090206 folder contains the batch files that execute the
MOVES runs.  Batch files are key to understanding the MOVES runs,
because they control the runs and specify the location and use of all
files.

HCSpeciation_new_Code folder contains MySQL scripts that are part of the
MOVES code.  The batch files copy these scripts into the MOVES code as a
way of making last minute corrections to the code.

MOVESGHGSource20080909 folder is the MOVES code.

The batch files modify the code by copying some MySQL scripts into it. 
This modification does not require recompilation.

RunSpecs folder contains the RunSpecs referenced in the batch files that
control the MOVES runs.

MOVESDB20080828.zip contains the MOVES default database.

Input folder contains the user-supplied databases that are referenced in
the RunSpecs and modify the MOVES default database

Perl Scripts folder contains a few scripts used to process MOVES output.

NMIM

BatchFilesAndRunSpecs folder contains NMIM batch files and RunSpecs. 
Batch files are key to understanding the NMIM runs, because they control
the runs and specify the location and use of all files.

NMIM20071009 folder is the NMIM code.

NCD20080727.zip is the zipped NMIM County Database 

M6203CHC contains compiled MOBILE6 executable (M6203ChcOxFixNMIM.exe)
and external datafiles that NMIM used to run MOBILE6.

NR05d-Bond-Final.zip is the version of the NONROAD Model used to
generate these inventories.

Scripts folder contains Perl and MySQL scripts that prepare,
post-process, and generate diagnostics for the NMIM runs.  

ProcessingScripts folder contains the scripts that post-processed NMIM
and MOVES output into the RFS2 FRM AQM Inventories.  An annotated list
of scripts is in rp.bat.

Description of the inventory production process

The MOVES runs produced emission factors at the state-month level for
all onroad gasoline vehicles except motorcycles.  Onroad gasoline
inventories were generated by multiplying MOVES emission factors by VMT
developed for the Office of Air Quality Planning and Standards's 2002
Version 3 Modeling Platform and used in the recently published
Locomotive-Marine Rule.  

MOVES was used for onroad gasoline emission factors because of
significant improvements compared with MOBILE6.  Because of difficulty
with MOVES VMT allocation, MOVES was used as a emission factor model and
NMIM VMT was applied at the state-month-SCC level. Because of
performance limitations of MOVES, there was only time to run it at the
state-month level.  State inventories were allocated to the county-month
level based on NMIM’s MOBILE6 runs.  Despite the limitations of these
methods, it was EPA’s judgment that they provided superior inventories
to MOBILE6.

Both MOBILE6 and NONROAD were run using NMIM (version NMIM20071009) with
NMIM County Database NCD20080724.  NMIM supplied emissions from the
NONROAD Model and from onroad sources not produced from MOVES. The
MOBILE6 Model was M6203ChcOxFixNMIM, a special version that  includes
cold-start VOC and the cold-start controls of the Mobile Source Air
Toxics Rule that go into effect in 2011. The NONROAD Model version was
NR05d-Bond-Final, which is the same as the publically released version
NONROAD2008.    

Onroad emissions generated at the state-month level from MOVES were
distributed to the county-month level using the results from MOBILE6 as
run by NMIM.  

For both NMIM and MOVES, temperatures and humidity were those of the air
quality modeling base year 2005, and fuels for each case were those
developed for this rule.

For the EISA case, E10 and E85 inventories were weighted together at the
state level based on the energy consumed by these two fuels.

Onroad gasoline PM was run by MOVES at 72F and adjusted by OAQPS at the
grid-hour level based on temperature curves supplied by OTAQ..

For some fuel-process combinations, there were MOVES bugs in calculating
VOC from THC.  For these cases, VOC was generated by post-processing
from THC using fuel-specific algorithms developed by Rich Cook.  For
these cases, Rich also supplied fuel-specific algorithms to calculate
the HAPs that MOVES calculates from VOC.

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 See http://www.epa.gov/ttn/chief/emch/index.html.

 Final Rule: Control of Emissions of Air Pollution from Locomotives and
Marine Compression-Ignition Engines Less Than 30 Liters per Cylinder
(published May 6, 2008 and republished June 30, 2008).  For details, see
http://www.epa.gov/otaq/locomotives.htm#2008final

