Physics
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsa41b0747v&link_type=abstract
American Geophysical Union, Fall Meeting 2001, abstract #SA41B-0747
Physics
0340 Middle Atmosphere: Composition And Chemistry, 2716 Energetic Particles, Precipitating
Scientific paper
Ionisation due to extraterrestrial charged particle precipitation leads to the formation of NOx and HOx in the stratosphere and mesosphere. Both NOx and HOx formation will alter the composition of the upper atmosphere significantly, as both are involved in katalytic ozone depletion cycles. While HOx, however, is extremely short-lived in the upper stratosphere and consequently, will affect the atmospheric composition only during particle precipitation events, NOx is believed to exist for months after big particle events, and thus could be transported down into the lower stratosphere during polar winter. Where and how far extraterrestrial charged particles can penetrate into the atmosphere however is determined by the strengths and form of the Earth magnetic field. We use a 2 D chemistry, transport and radiation model to investigate how different possible scenarios of the Earth magnetic field will affect the upper atmosphere NOx and HOx budget, and consequently, stratospheric and mesospheric ozone.
Burrows J.
Chipperfield Martyn P.
Jackman Charles
Kallenrode M.
Kuenzi K. F.
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