HR: 14:55h
AN: A33F-06    [Abstracts]
TI: A Comparison of Airborne Ozone Lidar Observations with Real-Time Air Quality Model Forecasts in New England During ICARTT-NEAQS 2004
AU: Djalalova, I V
EM: irina.v.djalalova@noaa.gov
AF: NOAA/Environmental Technology Laboratory, 325 Broadway, Boulder, CO 80305 United States
AU: * Wilczak, J M
EM: james.m.wilczak@noaa.gov
AF: NOAA/Environmental Technology Laboratory, 325 Broadway, Boulder, CO 80305 United States
AU: McKeen, S A
EM: stuart.a.mckeen@noaa.gov
AF: NOAA/Aeronomy Laboratory, 325 Broadway, Boulder, CO 80305 United States
AU: Senff, C
EM: christoph.senff@noaa.gov
AF: NOAA/Environmental Technology Laboratory, 325 Broadway, Boulder, CO 80305 United States
AB: During the ICARTT-NEAQS 2004 field program the NOAA/ETL airborne lidar was flown on a DC3 aircraft, measuring vertical profiles of ozone, from the surface up to 2 km, across the Northeastern U.S., including off-shore areas. Ozone predictions from three air quality models (Eta-CMAQ, WRF/Chem-27, and WRF/Chem-12) are compared to the lidar observations. Eta-CMAQ was run in a developmental mode by NOAA/NWS, while the two WRF simulations (with 27 and 12 km resolutions, and slightly different model formulations) were run at NOAA/FSL. Case study analyses of high ozone episodes demonstrate close agreement between the locations of model predicted ozone plumes downwind of urban areas with those observed by the lidar. Larger differences between the models and observations are found for the vertical distribution of ozone. Profile statistics from all of the flight data are divided into land, ocean, and coastal regimes, as well into night and day. Night/day differences are larger over land than over water, indicating an inability of the models to correctly track the diurnal cycle. In addition, large differences are found between the models over water, indicating difficulty in simulating the stable stratification that was nearly always present over water. The relation between the modeled and observed boundary layer depths and the vertical distribution of ozone will be investigated.
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0550 Model verification and validation
DE: 3238 Prediction (3245, 4263)
DE: 3355 Regional modeling
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005