Mon Oct 13, F. Flechtner
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Chanard, Kristel, Fleitout, Luce, Calais, Eric, Barbot, Sylvain, and Avouac, Jean-Philippe, 2018. Constraints on Transient Viscoelastic Rheology of the Asthenosphere From Seasonal Deformation. Geophysical Research Letters, 45(5):2328–2338, doi:10.1002/2017GL076451.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2018GeoRL..45.2328C,
author = {{Chanard}, Kristel and {Fleitout}, Luce and {Calais}, Eric and {Barbot}, Sylvain and {Avouac}, Jean-Philippe},
title = "{Constraints on Transient Viscoelastic Rheology of the Asthenosphere From Seasonal Deformation}",
journal = {\grl},
keywords = {viscoelastic, loading, asthenosphere, transient viscosity, postseismic, seasonal},
year = 2018,
month = mar,
volume = {45},
number = {5},
pages = {2328-2338},
abstract = "{We discuss the constraints on short-term asthenospheric viscosity
provided by seasonal deformation of the Earth. We use data from
195 globally distributed continuous Global Navigation Satellite
System stations. Surface loading is derived from the Gravity
Recovery and Climate Experiment and used as an input to predict
geodetic displacements. We compute Green's functions for surface
displacements for a purely elastic spherical reference Earth
model and for viscoelastic Earth models. We show that a range of
transient viscoelastic rheologies derived to explain the early
phase of postseismic deformation may induce a detectable effect
on the phase and amplitude of horizontal displacements induced
by seasonal loading at long wavelengths (1,300-4,000 km). By
comparing predicted and observed seasonal horizontal motion, we
conclude that transient asthenospheric viscosity cannot be lower
than 5 {\texttimes} {}10$^{17}$ Pa.s, suggesting that low values
of transient asthenospheric viscosities reported in some
postseismic studies cannot hold for the seasonal deformation
global average.}",
doi = {10.1002/2017GL076451},
adsurl = {https://ui.adsabs.harvard.edu/abs/2018GeoRL..45.2328C},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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