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Geomagnetic field models incorporating frozen-flux constraints

1993; Oxford University Press; Volume: 113; Issue: 2 Linguagem: Inglês

10.1111/j.1365-246x.1993.tb00897.x

1365-246X

Catherine Constable, Robert L. Parker, Philip B. Stark,

Scientific Research and Discoveries

An algorithm is developed for constructing plausible field models satisfying the frozen-flux hypothesis of Roberts and Scott (1965), which supposes that, for short time intervals, diffusion can be neglected. The algorithm is based on a new parameterization of the field in terms of its radial component B(r) at the core-mantle boundary (CMB). The model consists of values of B(r) at a finite set of points on the CMB, together with a rule for interpolating the values to other points. The parameterization of the B(r) is used to construct field models satisfying the frozen-flux hypothesis for the epochs 1945.5 and 1980.