edu.ucar.opensky::articles:15295 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-26T15:02:06.950801 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d79024t3 Organic aerosol formation in urban and industrial plumes near Houston and Dallas, TX 2009-08-27T00:00:00Z publication https://n2t.org/ark:/85065/d79024t3 https://doi.org/10.1029/2008JD011493 Bahreini, R. author Ervens, B. author Middlebrook, A. author Warneke, C. author De Gouw, J. author DeCarlo, P. author Jimenez, J. author Brock, C. author Neuman, J. author Ryerson, T. author Stark, H. author Atlas, E. author Brioude, J. author Fried, Alan author Holloway, J. author Peischl, J. author Richter, Dirk author Walega, James G. author Weibring, Petter author Wollny, A. author Fehsenfeld, F. author UCAR/NCAR - Library publisher We present measurements of organic aerosol (OA) in urban plumes from Houston and Dallas/Fort Worth as well as in industrial plumes in the Houston area during TexAQS-2006. Consistent with the TexAQS-2000 study, measurements show greater amount of aerosol mass downwind of the industrial centers compared to urban areas. This is likely due to higher emission and processing of volatile organic compounds (VOCs) from the industrial sources along the Houston ship channel. Comparisons of the current measurements with observations from the northeastern (NE) United States indicate that the observed ratios of the enhancement above background in OA, ΔOA, to the enhancement above background in CO, ΔCO, downwind of urban centers of Houston and Dallas/Fort Worth are within a factor of 2 of the same values in plumes from urban areas in the NE United States. In the ship channel plumes, ΔOA/ΔCO exceeds that in the urban areas by factors ranging from 1.5 to 7. We use a chemical box model to simulate secondary organic aerosol (SOA) formation from anthropogenic and biogenic VOCs in different plumes using recently reported dependencies of SOA yields on VOC/NO&#8339 ratios. Modeled SOA to CO enhancement ratios are within a factor of 2 of measurements. The increase in SOA from biogenic VOCs (BVOCs) predicted by the chemical box model as well as by a separate analysis using a Lagrangian particle dispersion model (FLEXPART) is <0.7 μg per standard m³ (sm⁻³). We find no evidence for a substantial influence of BVOCs on OA formation in our measurements in Houston area. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication An edited version of this paper was published by AGU. Copyright 2009 American Geophysical Union. None eng geoscientificInformation