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@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}
}