Basic mechanisms of solar variability

Details Basic mechanisms of solar variability Basic mechanisms of solar variability

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990nascp3086...23s&link_type=abstract

In NASA, Goddard Space Flight Center, Climate Impact of Solar Variability p 23-26 (SEE N91-12456 03-92)

Physics

Perturbation, Solar Activity, Solar Interior, Solar Magnetic Field, Solar Physics, Sun, Variability, Hydrostatics, Sensitivity

Scientific paper

In order to simulate the behavior of a changing Sun in a realistic way, researchers have used a perturbation analysis (the results are summarized in Endal et al. 1985). In this approach, they use a standard solar model and then vary several of the model parameters to mimic the sudden or gradual change of some physical property within the Sun. The evolution following the perturbation is followed in a physically self-consistent way, that is, hydrostatic and thermal processes occur in their normal timescales. This treatment has allowed us to determine the sensitivity of the various global parameters to physical processes affecting the solar interior, and it has guided us in defining the least complex global solar model which can address the question of climatically significant variability. Not surprisingly, magnetic fields play the crucial role. The current status of the model, what researchers have already learned from it, and the future prospects are discussed.

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