+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Flattening of the Earth; further from hydrostaticity than previously estimated



Flattening of the Earth; further from hydrostaticity than previously estimated



Geophysical Journal International 183.2



The knowledge of the gravitational potential coefficients J2 and J4 of a hydrostatic Earth model is necessary to deal with non-hydrostatic properties of our planet. They are indeed fundamental parameters when modelling the 3-D density structure or the rotational behaviour of our planet. The most widely used values computed by Nakiboglu need to be updated for two reasons. First, we have noted a mistake in one of his formulae. Secondly, the value of the inertia ratio I/MR2 chosen at the time of PREM is not any more the best estimate. Both corrections slightly but significantly reduce the hydrostatic J2 value: the dynamical flattening of the Earth is even further from hydrostaticity than previously thought. The difference between the polar and equatorial radii appears to be 113+ or -1 m (instead of 98 m) larger than the hydrostatic value. Moreover, uncertainties upon the hydrostatic parameters are estimated. Abstract Copyright (2010), RAS.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 037054944

Download citation: RISBibTeXText

DOI: 10.1111/j.1365-246x.2010.04771.x


Related references

Damage to Tropical Forests, or Why Were There So Many Kinds of Animals?: Just as biologists are discovering that there are more species of animals and plants on Earth than was previously estimated, the ravages of habitat destruction are beginning to devastate biological diversity, in most cases before individual species have become known to science. Science 234(4773): 149-150, 1986

Influence of flattening of the Earth on tides. Jahrestagung der Deutschen Geophysikalischen Gesellschaft eV, 1982

Earth-flattening transformation for P-SV waves. Bulletin of the Seismological Society of America 86(6): 1979-1982, 1996

The static flattening of the normal spheroid of the Earth. Acta Geodaetica, Geophysica et Montanistica 7(1-2): 227-236, 1972

Earth's flattening and harmonic coefficients of geopotential. Studia Geophysica et Geodaetica 12(3): 237-245, 1968

Relation between the shape of the Earth and flattening in INSAR. Cehui Xinxi yu Gongcheng = Journal of Geomatics 28(4): 7-8, 2003

Planetary oblateness and evolution of Earth flattening. Geophysical Journal International 99(3): 561-565, 1989

Earth flattening approximations for body waves. European Geophysical Society, Meeting, Abstracts, 1973

Earth-flattening procedure for the propagation of Rayleigh wave. Pure and Applied Geophysics 96(1): 61-74, 1972

A flattening transforming for P-SV waves in a transversely isotropic Earth. Bulletin of the Seismological Society of America 87(5): 1297-1304, 1997

The Earth Flattening Transformation in Body Wave Theory. Geophysical Journal International 35(1-3): 55-70, 1973

Earth's flattening effect on the tidal forcing field. Journal of Geophysics = Zeitschrift für Geophysik 54: 131-135, 1983

An earth-flattening transformation for waves from a point source. Bulletin of the Seismological Society of America 62(5): 1195-1210, 1972

Exact earth-flattening calculation for Love waves. Bulletin of the Seismological Society of America 60(4): 1123-1137, 1970

Exact Earth-flattening transformation for the Rayleigh-like vibrations. International Union of Geodesy and Geophysics, General Assembly 21, Week B: 11, 1995