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Pan Y, Shen WB, Hwang C, et al. Seasonal Mass Changes and Crustal Vertical Deformations Constrained by GPS and GRACE in Northeastern Tibet. Sensors (Basel). 2016;16(8)doi: 10.3390/s16081211.
Pan, Y., Shen, W. B., Hwang, C., Liao, C., Zhang, T., & Zhang, G. (2016). Seasonal Mass Changes and Crustal Vertical Deformations Constrained by GPS and GRACE in Northeastern Tibet. Sensors (Basel, Switzerland), 16(8), . https://doi.org/10.3390/s16081211
Pan, Yuanjin, et al. "Seasonal Mass Changes and Crustal Vertical Deformations Constrained by GPS and GRACE in Northeastern Tibet." Sensors (Basel, Switzerland) vol. 16,8 (2016). doi: https://doi.org/10.3390/s16081211
Pan Y, Shen WB, Hwang C, Liao C, Zhang T, Zhang G. Seasonal Mass Changes and Crustal Vertical Deformations Constrained by GPS and GRACE in Northeastern Tibet. Sensors (Basel). 2016 Aug 02;16(8). doi: 10.3390/s16081211. PMID: 27490550; PMCID: PMC5017377.
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Sensors (Basel). 2016 Aug 02;16(8). doi: 10.3390/s16081211.

Seasonal Mass Changes and Crustal Vertical Deformations Constrained by GPS and GRACE in Northeastern Tibet.

Sensors (Basel, Switzerland)

Yuanjin Pan, Wen-Bin Shen, Cheinway Hwang, Chaoming Liao, Tengxu Zhang, Guoqing Zhang

Affiliations

  1. School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China. [email protected].
  2. School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China. [email protected].
  3. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China. [email protected].
  4. School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China. [email protected].
  5. Department of Civil Engineering, National Chiao Tung University, Hsinchu 300, Taiwan. [email protected].
  6. School of Land Resources and Surveying, Guangxi Teachers Education University, Nanning 530001, China. [email protected].
  7. School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China. [email protected].
  8. School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China. [email protected].

PMID: 27490550 PMCID: PMC5017377 DOI: 10.3390/s16081211

Abstract

Surface vertical deformation includes the Earth's elastic response to mass loading on or near the surface. Continuous Global Positioning System (CGPS) stations record such deformations to estimate seasonal and secular mass changes. We used 41 CGPS stations to construct a time series of coordinate changes, which are decomposed by empirical orthogonal functions (EOFs), in northeastern Tibet. The first common mode shows clear seasonal changes, indicating seasonal surface mass re-distribution around northeastern Tibet. The GPS-derived result is then assessed in terms of the mass changes observed in northeastern Tibet. The GPS-derived common mode vertical change and the stacked Gravity Recovery and Climate Experiment (GRACE) mass change are consistent, suggesting that the seasonal surface mass variation is caused by changes in the hydrological, atmospheric and non-tidal ocean loads. The annual peak-to-peak surface mass changes derived from GPS and GRACE results show seasonal oscillations in mass loads, and the corresponding amplitudes are between 3 and 35 mm/year. There is an apparent gradually increasing gravity between 0.1 and 0.9 μGal/year in northeast Tibet. Crustal vertical deformation is determined after eliminating the surface load effects from GRACE, without considering Glacial Isostatic Adjustment (GIA) contribution. It reveals crustal uplift around northeastern Tibet from the corrected GPS vertical velocity. The unusual uplift of the Longmen Shan fault indicates tectonically sophisticated processes in northeastern Tibet.

Keywords: CGPS time series; GRACE observations and surface loads; crustal vertical deformation; empirical orthogonal function

References

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