利用GPS资料研究天津地区近期运动特征

Recent Movement Characteristics of Tianjin Area Using GPS Data

利用最新GPS连续站与流动站观测数据,得到天津地区的速度场及时间序列结果,结合区域应变时间序列,分析天津地区近期运动特征。结果表明:从速度场结果来看,天津地区2013—2017期的速度场较周围区域数值较小,水平运动较弱;从水平时间序列结果来看,天津地区的GPS测站以稳定的速度向东南运动,从垂直时间序列来看,北部以稳定的速率上升,南部以稳定的速率下降;从区域应变结果来看,整体以稳定的速率积累,没有明显的变化。

Here,the recent movement characteristics in Tianjin area are analyzed by velocity field and time series results obtained based on the latest GPS observation data and the regional strain time series.The results show that(1)the velocity field in Tianjin area during 2013-2017 is lower than that of the surrounding area,and the horizontal motion is relatively weak;(2)GPS stations in Tianjin area move southeastward at a steady speed;the GPS stations in northern Tianjin rise at a steady rate,and those in southern Tianjin descend at a stable rate;(3)the regional strain in the study area accumulates at a steady rate,with no obvious change.