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    Science (New York, N.Y.)
    |May 12, 1995
    PubMed
    Summary
    This summary is machine-generated.

    This study clarifies mantle chemical heterogeneity using seismic tomography. A correction notes that statistical significance of geoid correlations may be less than 99% due to non-random geoid data.

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    Area of Science:

    • Geophysics
    • Seismology
    • Geochemistry

    Background:

    • Seismic tomography reveals continent-ocean chemical heterogeneity in Earth's mantle.
    • Previous analysis correlated seismic data with geoid observations.

    Discussion:

    • A correction is issued regarding the statistical significance of correlation coefficients.
    • The nonhydrostatic geoid's harmonic coefficients exhibit a red spectrum, not random distribution.
    • This spectral characteristic affects the interpretation of statistical significance.

    Key Insights:

    • The classical measure of statistical significance may overestimate certainty.
    • The red spectrum of the geoid implies non-randomness in harmonic coefficients.
    • The true statistical significance of the correlation coefficient is potentially lower than previously stated.

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    Outlook:

    • Re-evaluation of statistical significance in geoid-based mantle studies is recommended.
    • Further research into the spectral properties of the geoid and their implications for mantle heterogeneity models is warranted.
    • Improved statistical methods are needed for analyzing geoid data in geophysical contexts.