Journal cover Journal topic
Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
doi:10.5194/hess-2016-552
© Author(s) 2016. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
25 Oct 2016
Review status
A revision of this discussion paper is under review for the journal Hydrology and Earth System Sciences (HESS).
Detecting seasonal and long-term vertical displacement in the North China Plain using GRACE and GPS
Linsong Wang1,2, Chao Chen1,2, Jinsong Du1, and Tongqing Wang3 1Hubei Subsurface Multi-scale Imaging Lab (SMIL), Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan, Hubei, China
2Three Gorges Research Center for Geo-hazard, Ministry of Education, China University of Geosciences, Wuhan, Hubei, China
3First Crust Deformation Monitoring and Administration Center, China Earthquake Administration, Tianjin, China
Abstract. We employ twenty-nine continuous Global Positioning System (GPS) time series data together with data from Gravity Recovery and Climate Experiment (GRACE) are analyzed to determine the seasonal displacements of surface loadings in the NCP. Results show significant seasonal variations and a strong correlation between GPS and GRACE results in the vertical displacement component; the average correlation and WRMS reduction between GPS and GRACE are 75.6 % and 28.9 %, respectively, when atmospheric and non-tidal ocean effects were removed, but the peak to peak annual amplitude of GPS (1.2 ~ 6.3 mm) is greater than GRACE-derived (1.0 ~ 2.2 mm). We also calculate the trend rate as well as the seasonal signal caused by the mass load change from GRACE data, the rate of GRACE-derived Terrestrial Water Storage (TWS) loss (after multiplying by the scaling factor) in the NCP was 3.39 cm/yr (equivalent to 12.42 km3/yr) from 2003 to 2009. For a 10-year time span (2003 to 2012), the rate was 2.57 cm/yr (equivalent to 9.41 km3/yr). Basing on spherical harmonic coefficients for the gravity field and load Love numbers, we use GRACE model to remove the vertical rates of elastic displacements due to the surface mass change from GPS data. An overall uplift for the whole region at the 0.04–1.47 mm/yr level from 2004 to 2009, but the rate of change direction is inconsistent in different GPS stations at −0.94–2.55 mm/yr level from 2010 to 2013.

Citation: Wang, L., Chen, C., Du, J., and Wang, T.: Detecting seasonal and long-term vertical displacement in the North China Plain using GRACE and GPS, Hydrol. Earth Syst. Sci. Discuss., doi:10.5194/hess-2016-552, in review, 2016.
Linsong Wang et al.
Linsong Wang et al.
Linsong Wang et al.

Viewed

Total article views: 320 (including HTML, PDF, and XML)

HTML PDF XML Total Supplement BibTeX EndNote
190 124 6 320 15 1 8

Views and downloads (calculated since 25 Oct 2016)

Cumulative views and downloads (calculated since 25 Oct 2016)

Viewed (geographical distribution)

Total article views: 320 (including HTML, PDF, and XML)

Thereof 318 with geography defined and 2 with unknown origin.

Country # Views %
  • 1

Saved

Discussed

Latest update: 27 Apr 2017
Publications Copernicus
Download
Short summary
The basic idea of this paper, detecting seasonal and long-term vertical deformation in the North China Plain (NCP) using GRACE and GPS, is mainly studying the loading deformation due to dynamic hydrological processes and groundwater-derived land subsidence in the NCP, which is one of the world's largest aquifer systems and supports an enormous exploitation of groundwater. Here, we study the seasonal and long-term mass change and its resulting vertical displacement in NCP.
The basic idea of this paper, detecting seasonal and long-term vertical deformation in the North...
Share