Can 'pure-path' models explain free oscillation data?,
Kawakatsu, H.
Geophys. Res. Lett., 10,
186-189, 1983.
Abstract
Several recently published regionalized models
of the earth's lateral heterogeneity obtained by `pure-path' analysis
are compared to
free oscillation data of Masters et al [1982].
Among these models, Okal's [1977] model shows a strongly dominant
pattern of angular order $l~=~2$ heterogeneity
that is strikingly similar to
Masters et al's data.
This suggests that Okal's model may explain the free oscillation data
as well as the "transition-zone" model of Masters et al, and that
shallow lateral heterogeneity may be responsible for the simple
pattern of Masters et al.
The apparent success of Okal's model suggests
the importance of lateral heterogeneity within oceanic regions.
The instability of `pure-path' analysis is also demonstrated by
spectral analysis of the lateral heterogeneities
of different `pure-path' models.