Mathematics – Logic
Scientific paper
Sep 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995geoji.122..755c&link_type=abstract
Geophysical Journal International, Vol. 122, No. 3, p. 755 - 764
Mathematics
Logic
25
Earth: Gravitational Field
Scientific paper
Variations in the even-degree zonal gravitational field will produce perturbations to the otherwise constant nodal precession rate in satellite orbits. The contribution of the atmospheric mass redistribution to this nodal "excitation" on the laser-ranging geodetic satellite Lageos is computed using the ECMWF meteorological analysis data over the period 1985-1991, with and without assuming the inverted-barometer (IB) effect for the ocean. These excitation time series are then compared with the observed Lageos nodal residual caused by global gravitational variations. Three frequency bands are examined with the following results. (1) In the interannual band (longer than a year), an apparent ≡14-month phase lead is found in the atmospheric excitation relative to the Lageos observation. (2) At seasonal periods, the atmospheric annual signal agrees reasonably well with the observations; the agreement is further strengthened by incorporating continental hydrological contributions. The semi-annual signal compares poorly with observations, indicating the presence of other geophysical sources than the atmosphere. (3) At the intraseasonal time-scale (shorter than a year) a wide-band correlation coefficient of 0.64 is found between the observed and the atmospheric excitations with the IF effect. The non-IB model yields a somewhat lower correlation of 0.59, but a better correspondence in amplitude. The correlations, together with the corresponding coherence spectra, clearly demonstrate a strong atmospheric contribution to the global gravitational variations.
Eanes R.
Fong Chao Benjamin
No associations
LandOfFree
Global gravitational changes due to atmospheric mass redistribution as observed by the Lageos nodal residual. does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Global gravitational changes due to atmospheric mass redistribution as observed by the Lageos nodal residual., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Global gravitational changes due to atmospheric mass redistribution as observed by the Lageos nodal residual. will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-827404