Surface elevation changes near Barrow (Alaska) measured using reflected GPS signals

We use reflected GPS signals to measure temporal changes of ground surface elevation due to dynamics of the active layer and near-surface permafrost. Applying the GPS interferometric reflectometry technique to the multipath signal-to-noise ratio data collected by a continuously-operating GPS receive...

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Bibliographic Details
Main Authors: Liu, Lin, Larson, Kristine M
Format: Dataset
Language:English
Published: PANGAEA 2018
Subjects:
Barrow_SG27
Barrow
Alaska
USA
DATE/TIME
Day of the year
Elevation change
error
SG27
permafrost
The Cryosphere
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.885935
https://doi.org/10.1594/PANGAEA.885935
Description
Summary:We use reflected GPS signals to measure temporal changes of ground surface elevation due to dynamics of the active layer and near-surface permafrost. Applying the GPS interferometric reflectometry technique to the multipath signal-to-noise ratio data collected by a continuously-operating GPS receiver mounted deep in permafrost in Barrow, Alaska, we can retrieve the vertical distance between the antenna and reflecting surface. Using this unique kind of observables, we obtain daily changes of surface elevation during July and August from 2004 to 2015. Our results show distinct temporal variations at three timescales: regular thaw settlement within each summer, strong inter-annual variability that is characterized by a sub-decadal subsidence trend followed by a brief uplift trend, and a secular subsidence trend of 0.26 cm/year during 2004 and 2015.

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