Abstract:

SCAR Epoch GPS Campaigns were hosted by Working Group on Geodesy and Geographic Information (WGGGI) of Scientific Committee on Antarctic Research (SCAR). The main objectives of this project were defined as follows: Measurement of the relative rates and the directions of separation of the Antarctic Plate from adjoining plates and microplates; Determination of relative motion of crustal blocks within the Antarctic Plate; Determination of vertical motion of the Antarctic lithosphere due to changing ice and ocean loadings; and Link of Antarctic tide gauges to the ITRF. As a member of the SCAR WGGGI, China had participated in the campaigns including both Great Wall Station and Zhongshan Station. The former had reoccupied five stages and the latter four stages respectively. The 7 stations, located at the Antarctic Peninsula, were selected to be processed. Meanwhile, 2 IGS stations were included. The results denote that the plate is steady in Antarctic Peninsula with a 10mm/a drift velocity to southwest.