Research Article
Hydrological Excitation of Polar Motion Derived from GRACE Gravity Field Solutions
Table 2
Correlations between the polar motion interannual variations estimated from geodetic residuals, GRACE solutions, and CPC and GLDAS hydrological models. Correlation values are better for than . This discrepancy is possibly caused by errors of the oceanic model removed from the geodetic observations.a
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aAccording to the Student-t test, the significance level of correlation is 0.17. The standard error of the difference between two values of correlation is 0.19. G-A-O: geodetic residuals (geodetic-atmospheric-oceanic excitations), GRACE: GRACE solutions of GRGS, CPC, and GLDAS: hydrological excitations. |