利用卫星大地测量技术研究海面动力地形及地转流的进展  

Progress in mean dynamic topography and geostrophic current research based on satellite geodetic techniques

作　　者：白希选 闫昊明[1] 朱耀仲[1] 彭鹏[1] 沈迎春[1,2] 

机构地区：[1]中国科学院测量与地球物理研究所大地测量与地球动力学国家重点实验室,武汉430077 [2]中国科学院大学,北京100049

出　　处：《地球物理学进展》2016年第5期2063-2071,共9页Progress in Geophysics

基　　金：国家重大科学研究计划(2012CB957802);国家自然科学基金(41321063;41374087;41174065)联合资助

摘　　要：随着卫星大地测量技术的发展,平均海平面高度与大地水准面资料的分辨率和精度得到大幅提高,这为确定高精度高分辨率的海面动力地形提供了条件,进而也促进了海面动力地形及地转流研究的发展.本文从数据资料、计算方法、空间尺度分析、误差分析及多源数据融合五个方面总结了目前利用卫星大地测量技术研究海面动力地形及地转流的进展.在此基础上,对目前该研究中存在的问题进行了分析,并对该研究今后的重点发展方向进行了展望.The Mean dynamic topography （MDT） is the deviation of mean sea surface from geoid field. Applying the geostrophic equilibrium theory, the surface geostrophic circulation could be determined by the gradient of MDT. According to the definition of MDT, its determination requires the mean sea surface and geoid data. Following the great developments of the satellite geodetic techniques, the mean sea surface height and global geoid fields could be determined precisely with considerable spatial resolution from space. These high quality mean sea surface height and geoid data enable us to precisely determine the geodetic MDT at smaller spatial scale, and enhance the research on geostrophic current. This paper summarized the research progress in both geodetic MDT and geostrophic current from data quality, calculation methods of MDT and geostrophic currents, spatial resolution analyses, errors analyses, and multiple-data combination. Furthermore, we present the main problems and give some recommendations of the following research work for the above researches.

关 键 词：海面动力地形 地转流 重力场模型 平均海面高度 空间尺度 

分 类 号：P223[天文地球—大地测量学与测量工程]