Evaluation of Emissions and Photochemical Processing Within Air Quality Model Forecasts During the 2006 TexAQS/GoMACCS Field Study

HR: 12:05h
AN: A12C-08 [Abstracts]
TI: Evaluation of Emissions and Photochemical Processing Within Air Quality Model Forecasts During the 2006 TexAQS/GoMACCS Field Study
AU: * McKeen, S A
EM: Stuart.A.McKeen@noaa.gov
AF: NOAA Earth System Research Laboratory, Chemical Sciences Division, R/CSD4 325 Broadway, Boulder, CO 80305-3328, United States
AU: * McKeen, S A
EM: Stuart.A.McKeen@noaa.gov
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado, CB216, Boulder, CO 80305-3328, United States
AU: Grell, G
EM: Georg.A.Grell@noaa.gov
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado, CB216, Boulder, CO 80305-3328, United States
AU: Grell, G
EM: Georg.A.Grell@noaa.gov
AF: NOAA Earth System Research Laboratory, Global Sciences Division, R/GSD1 325 Broadway, Boulder, CO 80305-3328, United States
AU: Peckham, S
EM: Steven.Peckham@noaa.gov
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado, CB216, Boulder, CO 80305-3328, United States
AU: Peckham, S
EM: Steven.Peckham@noaa.gov
AF: NOAA Earth System Research Laboratory, Global Sciences Division, R/GSD1 325 Broadway, Boulder, CO 80305-3328, United States
AU: McQueen, J
EM: Jeff.Mcqueen@noaa.gov
AF: NOAA National Weather Service, Environmental Modeling Center, W/NP2 5200 Auth Road, Camp Springs, MD 20746, United States
AU: Lee, P
EM: Pius.Lee@noaa.gov
AF: NOAA National Weather Service, Environmental Modeling Center, W/NP2 5200 Auth Road, Camp Springs, MD 20746, United States
AU: McHenry, J
EM: John.McHenry@baronams.com
AF: Baron AMS, North Carolina Supercomputing Center 3021 Cornwallis Road, Research Triangle Pk, NC 27709, United States
AU: Gong, W
EM: Wanmin.Gong@ec.gc.ca
AF: Environment Canada, AQRD/ASTD/STB 4905 Dufferin Street, Downsview, ON M3H 5T4, Canada
AU: Bouchet, V
EM: Veronique.Bouchet@ec.gc.ca
AF: Environment Canada, Centre Meteorologique Canada 2121 Route Transcanadienne, Dorval, QU H9P 1J3, Canada
AU: Tang, Y
EM: Youhua.Tang@noaa.gov
AF: NOAA National Weather Service, Environmental Modeling Center, W/NP2 5200 Auth Road, Camp Springs, MD 20746, United States
AU: Tang, Y
EM: Youhua.Tang@noaa.gov
AF: University of Iowa Center for Global and Regional Environmental Research, University of Iowa, Iowa City, IA 52242, United States
AU: Carmichael, G
EM: gcarmich@engineering.uiowa.edu
AF: University of Iowa Center for Global and Regional Environmental Research, University of Iowa, Iowa City, IA 52242, United States
AU: Wilczak, J
EM: James.M.Wilczak@noaa.gov
AF: NOAA Earth System Research Laboratory, Physical Sciences Division, R/PSD 325 Broadway, Boulder, CO 80305-3328, United States
AU: Djalalova, I
EM: Irina.V.Djalalova@noaa.gov
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado, CB216, Boulder, CO 80305-3328, United States
AU: Djalalova, I
EM: Irina.V.Djalalova@noaa.gov
AF: NOAA Earth System Research Laboratory, Physical Sciences Division, R/PSD 325 Broadway, Boulder, CO 80305-3328, United States
AU: None, N
AU: None, N
AB: Several air-quality models provided real-time forecasts of ozone and PM2.5 aerosols during the TexAQS/GoMACCS field campaign. These forecast models include two versions of the NOAA/ESRL/GSD WRF/Chem model, a developmental version of the NWS/NCEP CMAQ/WRF model, the Canadian Meteorological Services CHRONOS and AURAMS models, the MM5 based MAQSIP model from Baron Advanced Meteorological Services Inc., and the University of Iowa STEM model. Statistical evaluations of each model with the U.S. EPA AIRNow ozone and PM2.5 network over Eastern Texas during the summer of 2006 point to persistent model biases in surface predictions of these two criteria pollutants. Uncertainties in emission inventories and photochemical mechanisms are likely sources of forecast error within each model. Detailed observations of dozens of gas-phase ozone precursors and aerosol components collected on board the NOAA-WP3 aircraft during TexAQS/GoMACCS are used to compare model and observed concentrations. Aircraft flight tracks were designed to characterize up-wind conditions and the evolving composition of urban plumes down-wind of Houston and Dallas, TX within the planetary boundary layer. The aircraft data for 10 flights during September of 2006 are used in three diagnostic evaluations of the various models: characterizing the background composition up-wind of the two urban areas, evaluating the photochemical processing leading to ozone and PM2.5 formation various distances down-wind of the urban sources, and using ratios of above-background concentrations to infer and compare emission ratios of key ozone and PM2.5 precursors.
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0365 Troposphere: composition and chemistry
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting