Physics
Scientific paper
May 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990angeo...8..365p&link_type=abstract
Annales Geophysicae (ISSN 0992-7689), vol. 8, May 1990, p. 365-367.
Physics
4
Electron Precipitation, High Energy Electrons, Magnetic Anomalies, Mesosphere, Ozone Depletion, Atlantic Ocean, Ionic Reactions, Magnetic Storms
Scientific paper
The effect of energetic electron precipitation at the South Atlantic magnetic anomaly on the local mesospheric ozone concentration has been investigated. In the mesosphere, the ionization produced by precipitation acts as a source of odd hydrogen. Since odd hydrogen processes dominate ozone destruction in this region, a decrease in the ozone concentration should be expected during these events. Based on a simple photochemical equilibrium model, it is estimated that at large solar zenith angles the ozone concentration between about 70 and 80 km altitude in the anomaly region can be considerably depleted, mainly during large geomagnetic storms.
Gonzalez Walter D.
Kirchhoff W. J. H. V.
Pinto Jr. O.
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