HR: 0800h
AN: SH31A-1172    [Abstracts]
TI: Cosmic Ray Modulation: Improving the Agreement Between Modelling and Observations
AU: Minnie, J
EM: fskjm@puk.ac.za
AF: Unit for Space Physics, North-West University, Potchefstroom Campus, Potchefstroom, 2520 South Africa
AU: * Burger, R A
EM: fskrab@puk.ac.za
AF: Unit for Space Physics, North-West University, Potchefstroom Campus, Potchefstroom, 2520 South Africa
AU: Parhi, S
EM: sparhi@bartol.udel.edu
AF: Bartol Research Institute, University of Delaware, Newark, DE 19716 United States
AU: Bieber, J W
EM: john@bartol.udel.edu
AF: Bartol Research Institute, University of Delaware, Newark, DE 19716 United States
AU: Matthaeus, W H
EM: yswhm@bartol.udel.edu
AF: Bartol Research Institute, University of Delaware, Newark, DE 19716 United States
AB: We compare the effects of two different models for perpendicular diffusion on the modulation of galactic cosmic ray protons in the heliosphere during solar minimum conditions. These two models correspond to the newly developed non-linear guiding center (NLGC) theory [Matthaeus et al., 2003] and the theory of Bieber and Matthaeus [1997] (known as BAM in several of our earlier publications). A steady-state two-dimensional numerical modulation model is used in this ab initio study, which incorporates a state-of-the-art turbulence model. Factors relevant to an improvement in the agreement between the ab initio modulation model and cosmic ray observations are discussed.
DE: 7859 Transport processes
DE: 7863 Turbulence
DE: 2104 Cosmic rays
SC: SPA-Solar and Heliospheric Physics [SH]
MN: 2004 AGU Fall Meeting