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PHASE II DDM FOR CAMx PROBING TOOLS
Project No. A-64
Leaders:
A. M. Dunker
R. S. MacArthur
Scope and Objective
The objectives of this
project are to (1) complete more rigorous testing and evaluation, and (2)
demonstrate probing tools in relevant database.
Current Status and Future Program
Several probing tools are
emerging for PM models. These include DDM (decoupled direct method), PSAT
(particulate source apportionment technology), and PA (process analysis) for
CAMx and TSSA (tagged species source apportionment) and PA for CMAQ. Later
tasks of the original A-51 proposal, including full-scale testing, were not
funded. The approach to be used in this study will include using a Regional
Planning Organization (RPO) modeling database to give the results a real-world
application.
The project has been
approved and will be done through ENVIRON, the A-51 contractor. ENVIRON will be
working with the CMAQ TSSA developers at the University of California at
Riverside and collaborate with an RPO or leverage the existing applications that
are being used. The project will yield a final report and/or journal papers on
probing tool implementation and comparison with updated CAMx source code if
changes result from extensive testing. These results will help encourage use of
probing tools by states and EPA in PM and visibility modeling for improved
diagnostics leading to better modeling and more detailed understanding of source
contributions and/or sensitivities. The committee issued a request for proposal
in November 2006 and approved a proposal received from ENVIRON.
CRC negotiated a
contract with ENVIRON at the end of 2006. The committee has scheduled a start
date of September, 2007 to allow completion of Projects A-56 and A-63.
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