Analysis of continuous GPS measurements from southern Victoria Land, Antarctica
Open-File Report
2007-1047-SRP-064
By: Michael J. Willis
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Abstract
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.
Suggested Citation
Willis, M., 2007, Analysis of continuous GPS measurements from southern Victoria Land, Antarctica: U.S. Geological Survey Open-File Report 2007-1047-SRP-064, 5 p., https://doi.org/10.3133/ofr20071047SRP065.
ISSN: 2331-1258 (online)
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Analysis of continuous GPS measurements from southern Victoria Land, Antarctica |
| Series title | Open-File Report |
| Series number | 2007-1047-SRP-064 |
| DOI | 10.3133/ofr20071047SRP065 |
| Year Published | 2007 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Reston, VA |
| Description | 5 p. |
| Larger Work Type | Report |
| Larger Work Subtype | USGS Numbered Series |
| Larger Work Title | Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007 |
| Other Geospatial | Antarctica;Victoria Land |
| Additional Online Files (Y/N) | N |