HR: 11:20h
AN: A42B-05    [Abstracts]
TI: Observations of Halogens at Summit, Greenland
AU: * Huey, L G
EM: greg.huey@eas.gatech.edu
AF: School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA 30033,
AU: Dibb, J
EM: jack.dibb@unh.edu
AF: Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, 03824,
AU: Stutz, J
EM: Jochen@atmos.ucla.edu
AF: Department of Atmospheric and Oceanic Sciences, UCLA, Los Angeles, 90095,
AU: Brooks, S
EM: Steve.Brooks@noaa.gov
AF: Atmospheric Turbulence and Diffusion Division, NOAA, Oak Ridge, 37830,
AU: von Glasow, R
EM: R.Von-Glasow@uea.ac.uk
AF: School of Environmental Sciences, University of East Anglia, Norwich, NR4 7TJ, United Kingdom
AU: Lefer, B
EM: blefer@uh.edu
AF: Department of Geosciences, University of Houston, Houston, 77204,
AU: Chen, G
EM: gao.chen@nasa.gov
AF: Langley Research Center, NASA, Hampton, 23681,
AU: Kim, S
EM: skim@eas.gatech.edu
AF: School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA 30033,
AU: Tanner, D
EM: tanner@eas.gatech.edu
AF: School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA 30033,
AB: During May and June 2007 a field campaign was carried out at Summit, Greenland (altitude 3.2 km, latitude = 72.55°N) to investigate the importance of halogens in this remote environment. Instruments were deployed to obtain a large suite of observations that included: BrO, Hg°, reactive gaseous mercury (RGM) , OH, RO2, CO, NO, O3, HCl, HNO3, HO2NO2, SO2, soluble bromide, snow ionic composition, and J values. Significant levels of BrO (1-3 pptv) were often observed by both a differential optical absorption spectrometer (DOAS) and a chemical ionization mass spectrometer (CIMS). Both BrO and soluble bromide appear to be reasonably correlated with solar radiation. Depletion of elemental mercury and production of RGM was also frequently observed. These results indicate that halogen chemistry is active at Summit during summer. A summary of our preliminary observations as well as the impact of halogen chemistry on HOx radicals will be presented.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0365 Troposphere: composition and chemistry
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting