HR: 16:30h
AN: A44B-03    [Abstracts]
TI: Chemical Processing of an Urban Plume Crossing the Gulf of Maine
AU: * Bates, T S
EM: tim.bates@noaa.gov
AF: NOAA/PMEL, 7600 Sand Point Way NE, Seattle, WA 98115 United States
AU: Quinn, P K
EM: patricia.k.quinn
AF: NOAA/PMEL, 7600 Sand Point Way NE, Seattle, WA 98115 United States
AU: Coffman, D
EM: derek.coffman@noaa.gov
AF: NOAA/PMEL, 7600 Sand Point Way NE, Seattle, WA 98115 United States
AU: Onasch, T
EM: onasch@aerodyne.com
AF: Aerodyne Research, Inc., 45 Manning Road, Billerica, MA 01821 United States
AU: Covert, D
EM: dcovert@u.washington.edu
AF: University of Washington, JISAO, Seattle, WA 98195 United States
AU: Goldan, P
EM: pgoldan@al.noaa.gov
AF: NOAA/AL, 325 Broadway, Boulder, CO 80303 United States
AU: Kuster, W
EM: wkuster@al.noaa.gov
AF: NOAA/AL, 325 Broadway, Boulder, CO 80303 United States
AU: Lerner, B
EM: blerner@al.noaa.gov
AF: NOAA/AL, 325 Broadway, Boulder, CO 80303 United States
AU: Meagher, J
EM: jmeagher@al.noaa.gov
AF: NOAA/AL, 325 Broadway, Boulder, CO 80303 United States
AU: Roberts, J
EM: jr@al.noaa.gov
AF: NOAA/AL, 325 Broadway, Boulder, CO 80303 United States
AU: Shao, M
EM: smin@al.noaa.gov
AF: NOAA/AL, 325 Broadway, Boulder, CO 80303 United States
AU: Williams, E
EM: eric@al.noaa.gov
AF: NOAA/AL, 325 Broadway, Boulder, CO 80303 United States
AU: Whitlow, S
EM: siw@unh.edu
AF: University of New Hampshire, ISOES, Durham, NH 03824 United States
AU: Dibb, J
EM: jack.dibb@unh.edu
AF: University of New Hampshire, ISOES, Durham, NH 03824 United States
AU: Fairall, C
EM: chris.fairall@noaa.gov
AF: NOAA/ETL, 325 Broadway, Boulder, CO 80303 United States
AU: Wolfe, D
EM: daniel.wolfe@noaa.gov
AF: NOAA/ETL, 325 Broadway, Boulder, CO 80303 United States
AU: Kollias, P
EM: pavlos.kollias@noaa.gov
AF: University of Miami, RSMAS, Miami, FL 33149 United States
AU: Ieng, J
EM: ijo@rsmas.miami.edu
AF: University of Miami, RSMAS, Miami, FL 33149 United States
AB: Aerosol and trace gas measurements were made aboard the NOAA RV Ronald H. Brown off the coast of New England during July/August 2004 as part of the New England Air Quality Study (NEAQS). Several urban plumes from Boston were tracked across the Gulf of Maine during the study to quantify the chemical processing of the gases and aerosols over time. On 1 August the ship tacked downwind to follow a power plant plume embedded within the urban Boston plume. During this 11 hour period, the ship crossed the plume 5 times over a downwind distance of 100 km. While not a Lagrangian experiment we were able to observe over time/distance 1) an "aging" of the hydrocarbon mixture, 2) a decrease in the NOx mixing ratio with a increase in the ozone, PAN, nitric acid and nitrate aerosol mixing ratios, 3) a decrease in the SO2 mixing ratio and the formation and growth of new particles, and 4) an increase in the organic aerosol concentration. These data will be used to quantify the chemical processing of the urban plume over the day.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0305 Aerosols and particles (0345, 4801)
DE: 0345 Pollution--urban and regional (0305)
DE: 0365 Troposphere--composition and chemistry
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting