Reference : Improved Constraints on Models of Glacial Isostatic Adjustment: A Review of the Contr...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
Physical, chemical, mathematical & earth Sciences : Physics
Improved Constraints on Models of Glacial Isostatic Adjustment: A Review of the Contribution of Ground-based Geodetic Observations
King, M. [School of Civil Engineering and Geosciences, Newcastle University]
Altamimi, Z. [Institut Geographique National, ENSG/LAREG]
Boehm, J. [Institute of Geodesy and Geophysics E1281, Vienna University of Technology]
Bos, M. [CIMAR/CIIMAR, Centro Interdisciplinar de Investigacao Marinha e Ambiental Universidade do Porto]
Dach, R. [Astronomical Institute, University of Bern]
Elosegui, P. [Institute for Space Sciences, CSIC-IEEC]
Fund, F. [Laboratoire de Ge´omatique et de Ge´ode´sie (L2G), ESGT/CNAM]
Hernandez-Pajares, M. [Applied Mathematics IV, Universitat Politecnica de Catalunya]
Lavalee, D. [Delft Institute of Earth Observation and Space Systems]
Mendes Cerveira, P. J. [BEWAG Geoservice GmbH]
Pena, N. [School of Civil Engineering and Geosciences, Newcastle University]
Riva, R. [Delft Institute of Earth Observation and Space Systems]
Steigenberger, P. [Institut fur Astronomische und Physikalische Geodasie, Technische Universitat Munchen]
van Dam, Tonie mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
Vituari, L. [Dipartimento di Ingegneria delle Strutture, dei trasporti, delle acque, del rilevamento, del territorio]
Williams, S. [National Oceanography Centre]
Willis, P. [Institut de Physique du Globe de Paris]
Surveys in Geophysics
Yes (verified by ORBilu)
[en] Glacial isostatic adjustment (GIA) ; Ice sheet mass balance ; geodesy ; Antarctica ; Greenland ; GPS ; VLBI ; SLR ; Doris
[en] The provision of accurate models of Glacial Isostatic Adjustment (GIA) is
presently a priority need in climate studies, largely due to the potential of the Gravity
Recovery and Climate Experiment (GRACE) data to be used to determine accurate and
continent-wide assessments of ice mass change and hydrology. However, modelled GIA isuncertain due to insufficient constraints on our knowledge of past glacial changes and to
large simplifications in the underlying Earth models. Consequently, we show differences
between models that exceed several mm/year in terms of surface displacement for the two
major ice sheets: Greenland and Antarctica. Geodetic measurements of surface displacement
offer the potential for new constraints to be made on GIA models, especially when
they are used to improve structural features of the Earth’s interior as to allow for a more
realistic reconstruction of the glaciation history. We present the distribution of presently
available campaign and continuous geodetic measurements in Greenland and Antarctica
and summarise surface velocities published to date, showing substantial disagreement
between techniques and GIA models alike. We review the current state-of-the-art in
ground-based geodesy (GPS, VLBI, DORIS, SLR) in determining accurate and precise
surface velocities. In particular, we focus on known areas of need in GPS observation level
models and the terrestrial reference frame in order to advance geodetic observation precision/
accuracy toward 0.1 mm/year and therefore further constrain models of GIA and
subsequent present-day ice mass change estimates.

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