HR: 1340h
AN: A23B-0951    [Abstracts]
TI: Ozone Depleting Substances: An Update on Fractional Halogen Release Rates and Short Lived Organic Halogens.
AU: * Schauffler, S M
EM: sues@ucar.edu
AF: NCAR, P.O. Box 3000, Boulder, CO 80307 United States
AU: Atlas, E L
EM: eatlas@rsmas.miami.edu
AF: University of Miami, Rm 244 Science & Admin Bldg 4600 Rickenbacker Causeway, Miami, FL 33149 United States
AB: Future stratospheric ozone loss may be calculated from various organic halogen production/emission scenarios and inorganic halogen release rates. Effective equivalent stratospheric chlorine (EESC) is a calculation of the amount of inorganic chlorine and the equivalent amount of inorganic bromine available for reaction with stratospheric ozone. Calculations of EESC require values for the release of inorganic halogen for each ozone depleting substance, which are variable in space and time. We use our measurements of organic halogen compounds in the stratosphere together with temporal tropospheric trends and age of stratospheric air to calculate inorganic halogen release for each compound relative to age of air. These values are then used to calculate and compare EESC values for several ages. We also use our measurements of organic bromine compounds in the mid to upper troposphere and lower stratosphere to estimate the potential amount of inorganic bromine entering the stratosphere.
DE: 0340 Middle atmosphere: composition and chemistry
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005