| Title: | 4DVar Data Assimilation |
| Project Period: | 01/01/2006 - 05/31/2007 |
| Total Budget: | $100,000 |
This project will deploy the 4DVar data assimilation method in the context of the STEM regional air quality model to accomplish two tasks: 1) source apportionment to attribute ozone formed during 8-hour ozone exceedances in the Dallas-Ft. Worth (DFW) area to local, intra-State and out-of-State emissions sources; and 2) inverse modeling to evaluate and correct the regional emissions inventory in East Texas based on satellite, airborne, profiler, and ground monitor measurements. The historical time period that will form the basis of the modeling assessment will be the August episode period of 2004 and the 2005 ozone season. Satellite measurements to be used as part of the inverse modeling assessment will include NO2 and HCHO measurements from SCHIAMACHY, and CO from AIRS and MOPITT. The contractor will strive to make comprehensive use of measurements from the TexAQS II 2005 field study in collaboration with other investigators funded by TERC, especially on the separate Project H60 (Regional Transport Modeling for East Texas), to which the efforts on this project will be linked.
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