HR: 09:05h
AN: SM11A-05    [PDF]
TI: Solar-Atmospheric Coupling by Electrons: Mesospheric, Stratospheric, and Tropospheric Effects
AU: * Callis, L B
EM: lbos2@aol.com
AF: Atmospheric Effects, 613 W. Riverview Dr., Suffolk, VA 23434 United States
AU: Rozanov, E
EM: e.rozanov@pmodwrc,ch
AF: PMOD/WRC and IACETH, Dorfstrasse 33, Davos Dorf, CH-7260 Switzerland
AU: Schlesinger, M E
EM: schlesin@atmos.uiuc.edu
AF: University of Illinois at Urbana-Champaign, 105 S. Gregory St., Urbana, IL 61801 United States
AU: Yang, F
EM: fyang@climate.gsfc.nasa.gov
AF: NASA Goddard Space Flight Center, Code 913, Greenbelt, MD 20771 United States
AB: 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.
DE: 0341 Middle atmosphere--constituent transport and chemistry (3334)
DE: 1620 Climate dynamics (3309)
DE: 2716 Energetic particles, precipitating
DE: 2784 Solar wind/magnetosphere interactions
DE: 3334 Middle atmosphere dynamics (0341, 0342)
SC: SPA - Magnetospheric Physics [SM]
MN: 2003 Fall Meeting