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Volume 11: Pages 569-575, 1998
Transfer of Free Electrons to Chlorine and Its Consequences for Mitigating Ozone Depletion in a Computational Model of the Antarctic Stratosphere
D. D. M. Ho 1, S. T. Brandon 1, J. J. Grabowski 2, K. T. Tsang 3, A. Y. Wong 4
1Lawrence Livermore National Laboratory, University of California, Livermore, California 94550 U.S.A.
2Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260 U.S.A.
3Science Applications International Corp., McLean, Virginia 22130 U.S.A.
4University of California, Los Angeles, California 90024 U.S.A.
Free electrons deposited into the Antarctic stratosphere could suppress catalytic ozone destruction by chlorine. This is beause free electrons, at appropriate concentrations, induce Cl− formation, and Cl− does not react with O3. If the free‐electron concentration is greater than 109 cm−3, calculations on a computational model of the Antarctic stratosphere indicate that more than 80% of the free electrons eventually attach to chlorine and, as a result, ozone depletion during Antarctic spring can be essentially stopped under idealized conditions of no transport. However, extending this scheme for large‐scale in situ ozone remediation may be difficult because of various practical considerations.
Keywords: ozone remediation, negative‐ion chemistry, Antarctic ozone hole
Received: January 28, 1998; Published online: December 15, 2008