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利用中国地壳运动观测网络(CMONOC)及IGS站的GPS观测数据,确定了ITRF08下的中国大陆区域的速度场。结果分析表明,整个大陆区域在欧亚板块运动背景下,其平面运动速率大致在0.45~22.15 mm/a,高程方向运动速率大致在-5.68~5.22 mm/a。这是由于中国大陆区域在西南受到印度板块向欧亚板块对中国大陆进行推挤,东北区域受太平洋板块对欧亚板块的俯冲力,再加上日本海在此基础上的弧形外张力影响的结果。此外,中国大陆存在两个旋转(齿轮效应):西部顺时针旋转,东部逆时针旋转。因此,对中国的中部从北到南产生一个拉扯、挤压的力,在这一区域就出现抬升和沉降同时存在的现象。
Using the CMONOC and IGS stations’ GPS observations, the velocity field in the Chinese mainland under ITRF08 was determined. The analysis of the results shows that the plane movement rate of the entire continental area is 0.45 ~ 22.15 mm / a in the Eurasian plate movement and -5.68 ~ 5.22 mm / a in the elevation direction. This is because the mainland China region is pushed southwest by the Indian Plate to the Eurasian Plate, and the northeastern region is subducted by the Pacific Plate to the Eurasian Plate. Coupled with the arc-shaped external tension on the basis of the Sea of Japan, the result of. In addition, there are two rotations (gear effects) in mainland China: clockwise in the west and counterclockwise in the east. Therefore, there is a pulling force and a crushing force to the central China from north to south, and the phenomenon of simultaneous elevation and settlement appears in this region.