ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    On the dynamical effects of an inhomogeneous liquid core in the theory of nutation (1998)
    Springer
    Journal of geodesy 72 (1998), S. 385-403 
    Details
    ISSN: 1432-1394
    Keywords: Key words. Nutation ; Earth rotation ; Liquid core
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying
    Notes: Abstract. As shown in previous work, dynamical effects of a realistic model of a heterogeneous, compressible, stably stratified liquid core may be obtained by means of a simple analysis of the generalized two-dimensional Laplace tidal equation which describes tidal flows of an incompressible and non-gravitating fluid in a thin spherical layer with mobile boundaries. The solution was presented in the form of expansions in powers of a small parameter κ being the ratio of nutational motion frequency in space to the frequency of the Earth's diurnal rotation. Whereas in an earlier paper only first-order terms were taken into account, our present approach includes not only main second-order terms in the spherical harmonic expansions of the solutions, but also the terms of higher orders. These effects are calculated numerically for realistic models of the Earth's outer liquid core, solid inner core and anelastic mantle (PREM model). All tables are found in electronic version at http://www.tu-darmstadt.de/fb/vw/ipg/Welcome2.html
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001900050178
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    On the Dynamical Effects of the Mantle in the Theory of Nutations (1999)
    Springer
    Studia geophysica et geodaetica 43 (1999), S. 129-146 
    Details
    ISSN: 1573-1626
    Keywords: Earth rotation ; nutation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Abstract The influence of inerial forces in the mantle on its tidal deformations is considered. It is shown that the main role is played the corrections, described by spheroidal deformations, which result in corrections of nutational amplitudes of about −0.076 mas for the prograde semi-annual component, −0.056 mas for the retrograde annual component, 0.099 mas for the retrograde 19-year component, and −0.024 mas for the prograde 14-day component. These values exceed the errors of modem VLBI-measurements significantly (being of the order of 0.02-0.03 mas with the exception of the main nutational component); the effect of toroidal deformations is negligibly smalt in comparison with the accuracy of the VLBI-measurements, and for any practical purposes need not be considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1023333725039
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    On Subdiurnal Effects in Earth Rotation (1999)
    Springer
    Studia geophysica et geodaetica 43 (1999), S. 275-283 
    Details
    ISSN: 1573-1626
    Keywords: Earth rotation ; LOD ; Wavelet ; Fourier ; Maximum entropy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Abstract More than two years of almost continuous polar motion data (obtained by reprocessing GPS-Observations) have been used to analyse the daily/subdaily variations in Earth rotation based on the complex Wavelet-Technique. Systematic and spectral analytical investigations of the degree of variability of periods including tidal have been carried out. Relevant indications of oceanic effects, besides atmospheric components, have been observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1023342510791
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...