HR: 0830h
AN: A51A-10    [Abstracts]
TI: Long-Term HALOE Observations of HCl and HF
AU: * Anderson, J
EM: John.Anderson@hamptonu.edu
AF: Hampton University, 23 Tyler Street, Hampton, VA 23668 United States
AU: Russell, J M
EM: Jame.Russell@hamptonu.edu
AF: Hampton University, 23 Tyler Street, Hampton, VA 23668 United States
AB: The Halogen Occultation Experiment (HALOE) instrument on-board the Upper Atmosphere Research Satellite has provided unprecedented temporal and spatial information on the near-global distribution of hydrogen chloride (HCl) and hydrogen fluoride (HF) since October, 1991. Stratospheric HCl is central to the gas phase chemistry of ozone depletion. Stratospheric HF is a photodissociation product of anthropogenic CFCs, HCFCs, halons, and HFCs and it has no known appreciable natural sources. Near the stratopause, HCl comprises greater-than 93 percent of the total inorganic chlorine while HF comprises greater-than 85 percent of the total inorganic fluorine. We present updated near-global time series of HALOE derived total inorganic Cl and F at 55 km and compare these with time series derived from ground-based measurement programs, a United Nations Environment Programme scenario for CFC emissions, and mean-age theory. In addition, we will present updated time series of stratospheric column abundances and compare these with those measured at various Network for Detection of Stratospheric Change sites.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0340 Middle atmosphere--composition and chemistry
SC: Atmospheric Sciences [A]
MN: 2005 Joint Assembly