Several years of continuous data have been collected at remote bedrock Global Positioning System (GPS)
sites in southern Victoria Land, Antarctica. Annual to sub-annual variations are observed in the position time-series. An
atmospheric pressure loading (APL) effect is calculated from pressure field anomalies supplied by the European Centre
for Medium-Range Weather Forecasts (ECMWF) model loading an elastic Earth model. The predicted APL signal has
a moderate correlation with the vertical position time-series at McMurdo, Ross Island (International Global Navigation
Satellite System Service (IGS) station MCM4), produced using a global solution. In contrast, a local solution in which
MCM4 is the fiducial site generates a vertical time series for a remote site in Victoria Land (Cape Roberts, ROB4)
which exhibits a low, inverse correlation with the predicted atmospheric pressure loading signal. If, in the future,
known and well modeled geophysical loads can be separated from the time-series, then local hydrological loading, of
interest for glaciological and climate applications, can potentially be extracted from the GPS time-series.
Citation Information
Publication Year | 2007 |
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Title | Analysis of continuous GPS measurements from southern Victoria Land, Antarctica |
DOI | 10.3133/ofr20071047SRP065 |
Authors | Michael J. Willis |
Publication Type | Report |
Publication Subtype | USGS Numbered Series |
Series Title | Open-File Report |
Series Number | 2007-1047-SRP-064 |
Index ID | ofr20071047SRP065 |
Record Source | USGS Publications Warehouse |