Thu Dec 12, F.Flechtner
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Cheng, Minkang, 2024. Decadal Variations in Equatorial Ellipticity and Principal Axis of the Earth from Satellite Laser Ranging/GRACE. Surveys in Geophysics, 45(5):1601–1626, doi:10.1007/s10712-024-09852-w.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2024SGeo...45.1601C,
author = {{Cheng}, Minkang},
title = "{Decadal Variations in Equatorial Ellipticity and Principal Axis of the Earth from Satellite Laser Ranging/GRACE}",
journal = {Surveys in Geophysics},
keywords = {Decadal variation, Equatorial ellipticity, SLR, Core flows},
year = 2024,
month = oct,
volume = {45},
number = {5},
pages = {1601-1626},
abstract = "{The Earth exhibits an equatorial flattening specified by the ellipticity
and the east longitude (or orientation) of the equatorial major
axis, which is uniquely determined by the degree 2 and order 2
gravitational coefficients, C$_{22}$ and S$_{22}$. The 31-year
SLR (satellite laser ranging) and 22-year GRACE/GRACE-FO
(gravity recovery and climate experiment) data are analyzed to
study the climate-related secular and 5.7 years to decadal
variations in C$_{22}$ and S$_{22}$, in turn, the drift and
decadal variation in the Earth's equatorial ellipticity and
orientation of the principal axis of the least moment of
inertia. The effects of the surface floating mass changes
(including atmosphere, ocean and surface water redistribution
and the melting of the mountain and polar glaciers) and the
interior fluid convective (Earth's core flows) were evaluated.
Results reveal that the equatorial ellipticity of the Earth is
linearly increasing along with a remarkable decadal variation
and the Earth's equator is flattening by
\raisebox{-0.5ex}\textasciitilde 0.16 mm/yr.}",
doi = {10.1007/s10712-024-09852-w},
adsurl = {https://ui.adsabs.harvard.edu/abs/2024SGeo...45.1601C},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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