Physics
Scientific paper
Jul 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pepi...67..231r&link_type=abstract
Physics of the Earth and Planetary Interiors, Volume 67, Issue 3-4, p. 231-236.
Physics
4
Scientific paper
An apparent correlation of tidal gravity and heat flow can be examined using data from ten sites in eastern North America. A trend is clearly evident on the plot of M2 tidal gravity residuals and estimated heat flow values with a linear regression slope of 0.043 μgal m2mW-1 and a multiple correlation coefficient of 0.79. The mean deviation of points from the linear regression line is 0.2 μgal. Similar plots for the O1, K1, and S2 harmonics reveal positively sloping trends, but multiple correlation coefficients smaller than 0.06 indicate that little significance can be attached to these apparent trends. The O1, K1, and S2 tidal gravity residuals, as well as the N2 residuals, are not determined accurately enough to verify the trend found for the stronger M2 harmonic. The well-known linear relationship between heat flow and heat production within the eastern North American heat flow province has been interpreted to indicate significant upper crustal influence on spatial variations in heat flow. Therefore, a correlation of tidal gravity with heat flow implies a measurable upper crustal tidal response.
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