Physics
Scientific paper
Jul 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3613301y&link_type=abstract
Geophysical Research Letters, Volume 36, Issue 13, CiteID L13301
Physics
4
Geodesy And Gravity: Non-Tectonic Deformation, Geodesy And Gravity: Satellite Geodesy: Results (6929, 7215, 7230, 7240), Geodesy And Gravity: Global Change From Geodesy (1222, 1622, 1630, 1641, 1645, 4556), Geodesy And Gravity: General Or Miscellaneous (1709)
Scientific paper
Long-term continuous Global Positioning System (GPS) observations have become an important tool for studying the various geodynamic processes. To fully study the geodynamic processes at GPS stations, the temporal movements of GPS monuments and nearby bedrock induced by thermal expansion need to be considered. In this paper, we extend a theoretical model to estimate the thermal expansions of GPS monuments and nearby bedrock for 86 globally distributed GPS stations based upon measurements of surface air temperatures. The results show that annual temperature variations are the dominant contributors for the thermal expansion of GPS monuments and nearby bedrock. The contributions of thermal expansion to GPS height changes display largely spatial variations and can reach to a few millimeters.
Chen Wu
Yan Haoming
Zhang Weimin
Zhong Min
Zhu Yaozhong
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