HR: 11:50h
AN: A12B-06    [Abstracts]
TI: Study of the Vertical Scale of Halogen Chemistry at Sunrise at Barrow, AK
AU: * Tackett, P
EM: ptackett@purdue.edu
AF: Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN 47907 United States
AU: Cavender, A
EM: acavende@purdue.edu
AF: Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN 47907 United States
AU: Morin, S
EM: samuel.morin@lgge.obs.ujf-grenoble.fr
AF: Laboratoire de Glaciologie et Geophysique de l'Environement, 54 Rue Moliere, BP 96, St. Martin d'Heres, F-38402 France
AU: Savarino, J
EM: joel.savarino@lgge.obs.ujf-grenoble.fr
AF: Laboratoire de Glaciologie et Geophysique de l'Environement, 54 Rue Moliere, BP 96, St. Martin d'Heres, F-38402 France
AU: Deary, J
EM: John.Deary@ec.gc.ca
AF: Environment Canada, Meteorological Service of Canada, Toronto, ON M3H 5T4 Canada
AU: Bottenheim, J
EM: Jan.Bottenheim@ec.gc.ca
AF: Environment Canada, Meteorological Service of Canada, Toronto, ON M3H 5T4 Canada
AU: Steffen, A
EM: Alexandra.Steffen@ec.gc.ca
AF: Environment Canada, Meteorological Service of Canada, Toronto, ON M3H 5T4 Canada
AU: Shepson, P
EM: pshepson@purdue.edu
AF: Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN 47907 United States
AB: The vertical extent of halogen chemistry in the Arctic springtime was investigated through the measurement of several atmospheric chemical components. Various chemical species that are modified by halogen chemistry were measured during late March through mid-April 2005, including VOCs, ozone, and mercury. Airborne volatile organic compounds were sampled through ambient air samples and collected onto Tenax-TA sorbent material. GEM (gaseous elemental mercury) was sampled through a Teflon inlet leading to a ground-based cold vapor atomic fluorescence mercury analyzer, and ambient ozone concentrations were determined using a 2B ozone spectrometer. The sampling apparatus was suspended beneath a tethered balloon that allowed collection at multiple altitudes extending up to 300 meters. The Tenax sample tubes were analyzed via cryo-concentrated thermal desorption/GC, and detected by FID (flame ionization detection). Species will be presented and discussed in a vertical profile format to enable analysis of the vertical extent of halogen chemistry in the halogen-rich lower atmosphere occurring during polar sunrise.
DE: 0750 Sea ice (4540)
DE: 0794 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005