Physics
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsm11a..05c&link_type=abstract
American Geophysical Union, Fall Meeting 2003, abstract #SM11A-05
Physics
0341 Middle Atmosphere: Constituent Transport And Chemistry (3334), 1620 Climate Dynamics (3309), 2716 Energetic Particles, Precipitating, 2784 Solar Wind/Magnetosphere Interactions, 3334 Middle Atmosphere Dynamics (0341, 0342)
Scientific paper
Published analyses of observational data have shown: (1) that energetic (1 keV < E < 1 MeV) electron precipitation (EEP) fluxes are highly correlated with the high speed solar-wind streams during the 11-year and 22-year solar cycles; (2) that high levels of odd nitrogen are formed during the precipitation of these electrons into the atmosphere; and (3) that during periods of advective descent, a portion of this odd nitrogen is transported from the mesosphere and lower thermosphere into the stratosphere. It has been suggested that this additional source of odd nitrogen is important to stratospheric ozone and temperatures, and hence may have an impact on the phase and amplitude of the long planetary waves extending into the troposphere. 2-D model simulations in comparison with observations have provided support for this linkage between the Sun and the atmosphere of the Earth. In the present paper we will: (1) review the evidence for this coupling; (2) display the observed and calculated effects of EEP in the mesosphere and stratosphere; and (3) present preliminary results, derived with the fully coupled 3-D UIUC climate/chemistry model, extending from the surface to approximately 98 km, that illustrate the effects of the coupling in the lower stratosphere and troposphere. We suggest that this coupling may help to reconcile the discrepancy between the observed and calculated atmospheric effects apparently related to the 11-year solar cycle variations. Unresolved problems relative to the linkage and the 3-D simulation will be discussed.
Callis Linwood B.
Rozanov E.
Schlesinger Michael E.
Yang Fangkai
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