Abstract
Many GPS sites show significant seasonal position variations (especially in the vertical), resulting from a combination of geophysical loading and systematic errors. It is common to realize a regional reference frame or align a time series with a model by transforming each epoch solution into ITRF (or a local or regional frame) using a regional set of sites, where these reference frame sites are assumed to move linearly with time. Seasonal variations in the frame sites can bias this frame realization and the seasonal variations are then aliased into the site coordinates.
I estimate seasonal variations at a set of sites across northern North America and the Arctic using an iterative non-parameteric approach. Seasonal variations at most sites exceed 4-5 mm in the vertical. A test with synthetic time series shows that ignoring these variations when realizing a daily or weekly reference frame can cause apparent seasonal variations in other sites as large as 4 mm amplitude. We should work toward a linear + seasonal model as part of our reference frame definition.
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References
Blewitt , G., D. Lavallée, P. Clarke, and K. Nurutdinov (2001), A new global mode of earth deformation: Seasonal cycle detected, Science, 294, 2342-2345,.
Dong, D., P. Fang, Y. Bock, M. K. Cheng, and S. Miyazaki (2002), Anatomy of apparent seasonal variations from GPS-derived site position time series, J. Geophys. Res., 107, doi:10.1029/2001JB000573.
Farrell, W. E. (1972), Deformation of the Earth by surface loads, Rev. Geophys. Space Phys., 10, 761-797.
Heki, K. (2001), Seasonal modulation of interseismic strain build-up in northeastern Japan driven by snow loads, Science, 293, 89-92.
Heki, K. (2003), Snow load and seasonal variation of earthquake occurrence in Japan, Earth Planet. Sci. Lett., 207, 159-164.
Larsen, C. F., R. Motyka, J. Freymueller, and K. Echelmeyer (2003), Tide gauge records of uplift along the northern Pacific-North American plate boundary, 1937 to 2001, J. Geophys. Res., 108(B4), doi:10.1029/2001JB001685.
M. Murakami, and S. Miyazaki (2001), Periodicity of strain accumulation detected by permanent GPS array: possible relationship to seasonality of major earthquakes’ occurrence, Geophys. Res. Lett., 28, 2983-2986.
Ray, J. (2006), Systematic errors in GPS position estimates, IGS Workshop 2006, Session 11 http://nng.esoc.esa.de/ws2006/session11.html, 2006.
Van Dam et al., J. Wahr, P. C. D. Milly, A. B. Shmakin, G. Blewitt, D. Lavallée, and K. M. Larson (2001), Crustal displacements due to continental water loading, Geophys. Res. Lett., 28, 651-654.
Wdowinski, S., Y. Bock, J. Zhang, P. Fang, J. Genrich (1997), Southern California Permanent GPS Geodetic Array: Spatial filtering of daily positions for estimating coseismic and postseismic displacements induced by the 1992 Landers earthquake, J. Geophys. Res., 102, 18,057-18,070.
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Freymueller, J.T. (2009). Seasonal Position Variations and Regional Reference Frame Realization. In: Drewes, H. (eds) Geodetic Reference Frames. International Association of Geodesy Symposia, vol 134. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-00860-3_30
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DOI: https://doi.org/10.1007/978-3-642-00860-3_30
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