Abstract
Wuhan Technical University Surveying and Mapping (WTUSM) carried out three GPS campaigns in the Tibetan Plateau since 1993. To improve the vertical component precision of GPS measurement, we estimated the remaining tropospheric refraction using the piecewise linear method after the SAASTAMOINEN model and corrected the tropospheric refraction by selecting one parameter for every two hours model to consider the variationof tropospheric refraction. Using the IGS combined ephemeris and corresponding EOP Series for 1995 and 1997 GPS campaigns, all baseline vectors were processed by GAMIT (Ver. 9.71) software, and network adjustment was carried out in ITRF97 frame by PowerAdj software (Ver. 3.3) which was developed by WTUSM considering the baseline vectors’ full covariance matrix. The resulting vertical velocity field determined from GPS campaigns in 1995 and 1997 shows that the average uplift rate in ITRF 97 frame is about 7.8 ± 7.6 mm/yr for all 14 repeated surveying stations in Tibet, and the average uplift rate is 16.2 ± 7.9 mm/yr in southern Tibet, which are compared with the results from the gravity measurements, leveling data and fission-track dating (FT).
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Chen, J. Y. and J. Zhang, On the crustal movement in Qumolongma feng and its adjacent area, ACTA Geophysica Sinica, 39, 67–78, 1996.
Herring, T. A., GLOBK: Global kalman filter VLBI and GPS analysis program, version 4.0, Mass. Inst. Technol., Cambridge, 1995.
Jackson, M. and R. Bilham, 1991—1992GPS Measurements across the Nepal Himalaya, Geophys. Res. Lett., 21, 1169–1172, 1994a.
Jackson, M. and R. Bilham, Constraints on Himalayan deformation inferred from vertical velocity fields in Nepal and Tibet, J. Geophys. Res., 99(b7), 13897–13912, 1994b.
Jiang, F. Z., C. J. Zhang, Z. H. Ni, and Y. P. Liu, Isostatic field Nontidal gravity measurement in Qinghai-Xizang Plateau, ACTA Geophysica Sinica, 32, 465–469, 1989.
King, R. W. and Y. Bock, Documentation for the MIT GPS analysis software: GAMIT, version 9.3, Mass. Inst. Technol., Cambridge, 1995.
Ma, X. Y., Lithospheric dynamics atlas of China, China Cartographic Publishing House, Beijing China, 18, 1989.
Ma, Z. J., J. S. Zhang, and Y. P. Wang, The 3-d deformational movement episodes and neotectonic domains in the Qinghai-Tibet Plateau, ACTA Geologica Sinica, 72(3), 211–227, 1998.
Wang, W. Y. and Z. Q. Yang, Application of the GPS technology in the survey of plate tectonic motion and vertical crustal displacement in the Himalayan area, J. Xi’an coll. Geol., 15, 1–8, 1993.
Zhang, C. J., Study on the Qinghai-Xizang crust and its movements via the temporal and spatial gravity distribution, Seismology and Geology, 18(3), 237–244, 1996.
Zhang, Q. S., The problem of uplift rate of the Tibetan Plateau, Chinese Science Bulletin, 529–531, 1991 (in Chinese).
Zhang, Z., The map of the recent vertical crustal deformation rate in China, Chinese National Report on Geodesy presented to the 19th general assembly of IUGG, Vancouver, 1987.
Zhong, D. Q. and L. Ding, Science in China (series D), vol. 26, 289–295, 1996.
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Xu, C., Liu, J., Song, C. et al. GPS measurements of present-day uplift in the Southern Tibet. Earth Planet Sp 52, 735–739 (2000). https://doi.org/10.1186/BF03352274
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DOI: https://doi.org/10.1186/BF03352274