IMIS

A new integrated search interface will become available in the next phase of marineinfo.org.
For the time being, please use IMIS to search available data

 

[ report an error in this record ]basket (1): add | show Print this page
one publication added to basket [302622]
Reversal of the direction of horizontal velocities induced by GIA as a function of mantle viscosity
Hermans, T.H.J.; van der Wal, W.; Broerse, T. (2018). Reversal of the direction of horizontal velocities induced by GIA as a function of mantle viscosity. Geophys. Res. Lett. 45(18): 9597-9604. https://dx.doi.org/10.1029/2018gl078533

Additional data:
In: Geophysical Research Letters. American Geophysical Union: Washington. ISSN 0094-8276; e-ISSN 1944-8007, more
Peer reviewed article  
Available in  Authors 
Authors  Top 
  • Hermans, T.H.J., more
  • van der Wal, W.
  • Broerse, T.
Abstract
    In regions undergoing glacial isostatic adjustment present‐day horizontal surface motion is observed to point mostly, but not always, away from the former ice load. To interpret these observations, we investigate the direction of horizontal velocities using glacial isostatic adjustment models. The direction is controlled by the opposing actions of inward mantle flow and outward lithosphere motion. In contrast with the prevailing idea that glacial isostatic adjustment‐induced horizontal velocities point outward, we show that velocities can be either outward or inward. Immediately after deglaciation velocities point inward but change direction to outward after a time that is controlled by mantle viscosity. Present‐day horizontal velocities point outward for a uniform mantle viscosity below 1020 Pa s and inward for above 1022 Pa s, with a combination of outward and inward in between. Our results help to interpret GPS‐observed horizontal velocities in areas with varying mantle viscosity.
All data in the Integrated Marine Information System (IMIS) is subject to the VLIZ privacy policy Top | Authors