ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Download
Publications Copernicus
Download
Citation
Articles | Volume IV-2/W5
ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., IV-2/W5, 601–606, 2019
https://doi.org/10.5194/isprs-annals-IV-2-W5-601-2019
ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., IV-2/W5, 601–606, 2019
https://doi.org/10.5194/isprs-annals-IV-2-W5-601-2019

  29 May 2019

29 May 2019

THE VERTICAL LAND MOTION OF TIDE GAUGE AND ABSOLUTE SEA LEVEL RISE IN BOHAI SEA

D. Zhou1, W. Sun1,2, Y. Fu1,2, and X. Zhou1,2 D. Zhou et al.
  • 1The First Institute of Oceanography, Ministry of Natural Resources, People's Republic of China
  • 2Shandong University of Science and Technology, People's Republic of China

Keywords: Co-located GNSS stations, Tide Gauges, Vertical Land Motion, Absolute Mean Sea Level Change, Relative Mean Sea Level Change

Abstract. The ground vertical movement of the tide gauges around the Bohai sea was firstly analyzed by using the observation data from 2009 to 2017 of the nine co-located GNSS stations. It was found that the change rate of ground vertical motion of four stations was in the same order of magnitude as the sea level change. In particular, the land subsidence rate of BTGU station reaches 11.47 mm/yr, which should be paid special attention to in the analysis of sea level change. Then combined with long-term tide gauges and the satellite altimetry results, the sea level changes in the Bohai sea and adjacent waters from 1993 to 2012 were analyzed. The relative and absolute sea level rise rates of the sea area are 3.81 mm/yr and 3.61 mm/yr, respectively, both are higher than the global average rate of change. At the same time, it is found that the vertical land motion of tide gauge stations is the main factor causing regional differences in relative sea level changes.