Polluted Marine Boundary Layer Measurement of Nitryl Chloride; a Product of Nightime NOx and Aerosol Chemistry

HR: 16:00h
AN: A24C-01 INVITED [Abstracts]
TI: Polluted Marine Boundary Layer Measurement of Nitryl Chloride; a Product of Nightime NOx and Aerosol Chemistry
AU: * Roberts, J M
EM: James.M.Roberts@noaa.gov
AF: Chemical Sciences Division, NOAA Earth System Research Laboratory, 325 Broadway, Boulder, CO 80305, United States
AU: Osthoff, H D
EM: hostoff@ucalgary.ca
AF: Department of Chemistry University of Calgary, 2500 University Drive NW, Calgary, ALB T2N 1N4, Canada
AU: Brown, S S
EM: Steven.S.Brown@noaa.gov
AF: Chemical Sciences Division, NOAA Earth System Research Laboratory, 325 Broadway, Boulder, CO 80305, United States
AU: Ravishankara, A R
EM: A.R.Ravishankara@noaa.gov
AF: Chemical Sciences Division, NOAA Earth System Research Laboratory, 325 Broadway, Boulder, CO 80305, United States
AU: Ravishankara, A R
EM: A.R.Ravishankara@noaa.gov
AF: Cooperative Institute for Research in the Environmental Sciences, University of Colorado, CB 216, Boulder, CO 80309, United States
AU: Williams, E J
EM: Eric.J.Williams@noaa.gov
AF: Chemical Sciences Division, NOAA Earth System Research Laboratory, 325 Broadway, Boulder, CO 80305, United States
AU: Williams, E J
EM: Eric.J.Williams@noaa.gov
AF: Cooperative Institute for Research in the Environmental Sciences, University of Colorado, CB 216, Boulder, CO 80309, United States
AU: Lerner, B M
EM: Brian.Lerner@noaa.gov
AF: Chemical Sciences Division, NOAA Earth System Research Laboratory, 325 Broadway, Boulder, CO 80305, United States
AU: Lerner, B M
EM: Brian.Lerner@noaa.gov
AF: Cooperative Institute for Research in the Environmental Sciences, University of Colorado, CB 216, Boulder, CO 80309, United States
AU: Talukdar, R K
EM: Ranajit.K.Talukdar@noaa.gov
AF: Chemical Sciences Division, NOAA Earth System Research Laboratory, 325 Broadway, Boulder, CO 80305, United States
AU: Talukdar, R K
EM: Ranajit.K.Talukdar@noaa.gov
AF: Cooperative Institute for Research in the Environmental Sciences, University of Colorado, CB 216, Boulder, CO 80309, United States
AU: Burkholder, J B
EM: James.B.Burkholder@noaa.gov
AF: Chemical Sciences Division, NOAA Earth System Research Laboratory, 325 Broadway, Boulder, CO 80305, United States
AU: Burkholder, J B
EM: James.B.Burkholder@noaa.gov
AF: Cooperative Institute for Research in the Environmental Sciences, University of Colorado, CB 216, Boulder, CO 80309, United States
AU: Stark, H
EM: Harald.Stark@noaa.gov
AF: Chemical Sciences Division, NOAA Earth System Research Laboratory, 325 Broadway, Boulder, CO 80305, United States
AU: Stark, H
EM: Harald.Stark@noaa.gov
AF: Cooperative Institute for Research in the Environmental Sciences, University of Colorado, CB 216, Boulder, CO 80309, United States
AU: Sommariva, R
EM: Roberto.Sommariva@noaa.gov
AF: Chemical Sciences Division, NOAA Earth System Research Laboratory, 325 Broadway, Boulder, CO 80305, United States
AU: Sommariva, R
EM: Roberto.Sommariva@noaa.gov
AF: Cooperative Institute for Research in the Environmental Sciences, University of Colorado, CB 216, Boulder, CO 80309, United States
AU: Quinn, P K
EM: Patricia.K.Quinn@noaa.gov
AF: Atmospheric Chemistry Program, Pacific Marine Laboratory, NOAA, 7600 Sand Point Way, Seattle, WA 98115, United States
AU: Bates, T S
EM: Tim.Bates@noaa.gov
AF: Atmospheric Chemistry Program, Pacific Marine Laboratory, NOAA, 7600 Sand Point Way, Seattle, WA 98115, United States
AU: Coffman, D
EM: Derek.Coffman@noaa.gov
AF: Atmospheric Chemistry Program, Pacific Marine Laboratory, NOAA, 7600 Sand Point Way, Seattle, WA 98115, United States
AU: Meagher, J F
EM: James.F.Meagher@noaa.gov
AF: Chemical Sciences Division, NOAA Earth System Research Laboratory, 325 Broadway, Boulder, CO 80305, United States
AU: Fehsenfeld, F C
EM: Fred.C.Fehsenfeld@noaa.gov
AF: Chemical Sciences Division, NOAA Earth System Research Laboratory, 325 Broadway, Boulder, CO 80305, United States
AU: Fehsenfeld, F C
EM: Fred.C.Fehsenfeld@noaa.gov
AF: Cooperative Institute for Research in the Environmental Sciences, University of Colorado, CB 216, Boulder, CO 80309, United States
AB: The first ambient measurements of nitryl chloride (ClNO₂) were made by I^- chemical ionization mass spectrometry (CIMS) during the TexAQS/GoMACCS 2006 study aboard the NOAA R/V Ronald H Brown. ClNO₂ was associated with the nighttime reaction of N₂O₅ with chloride-containing aerosol particles and was found at mixing ratios as high as 1.2 ppbv (1 minute average) in the Houston-Galveston Bay area. Several instances were observed in which ClNO₂ persisted into the morning hours, resulting in a significant chlorine atom source. Details of the ClNO₂ measurement, features of the ClNO₂ data, and the impact that this active chlorine species can have on morning photochemistry will be discussed.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0317 Chemical kinetic and photochemical properties
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0365 Troposphere: composition and chemistry
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting