联合多源数据确定中国海及周边海底地形模型!  

Recovery of Bathymetry over China Sea and Its Adjacent Areas by Combination of Multi-source Data

作　　者：胡敏章[1,2] 李建成[2] 金涛勇[2] 徐新禹[2] 邢乐林[1] 吴云龙[1] 

机构地区：[1]中国地震局地震研究所地震大地测量重点实验室,湖北武汉430071 [2]武汉大学地球空间环境与大地测量教育部重点实验室,湖北武汉430079

出　　处：《武汉大学学报（信息科学版）》2015年第9期1266-1273,共8页Geomatics and Information Science of Wuhan University

基　　金：中国地震局行业科研专项项目(201508006);国家测绘地理信息局测绘基础研究基金资助项目(13-01-01);中国地震局地震研究所所长基金重点资助项目(IS201326125);国家自然科学基金资助项目(41304018);中国地震局地震科技星火计划资助项目(XH14036)~~

摘　　要：联合船测海深、重力异常和垂直重力梯度异常数据,构建了中国海及周边地区1′×1′海底地形模型。船测海深数据主要用于构建波长大于200km波段的海底地形,垂直重力梯度异常数据用于反演100-200km波段内的海底地形,而重力异常数据用于反演波长小于100km波段的海底地形。以船测海深为检核参考,考察了本文模型在南中国海和菲律宾海地区的精度。结果表明,本文模型精度优于ETOPO1、GEBCO和DTU10模型,在南中国海地区与斯克里普斯海洋研究所（Scripps Institute of Oceanography,SIO）的海底地形模型V15.1精度一致,在菲律宾海地区较V15.1模型精度提高了约8.2%。In this paper, a 1＇× 1＇ bathymetry model over China Sea and its adjacent areas was formed combining ship soundings, gravity anomalies and vertical gravity gradient anomalies. The ship soundings were used for constraining bathymetry at wavelengths longer than 200 kin. The vertical gravity gradient anomalies were used for predicting bathymetry at 100-200 km wavelength. The gravity anomalies were used for predicting bathymetry at wavelength shorter than 100 km. Compared to ship soundings, the accuracy of the predicted model for the South China Sea and Philippine Sea was evaluated. The results show that the accuracy of the model is better than the ETOPO1, GEBCO and DTU10. In South China Sea, the accuracy of predicted model is consistent with the latest V15.1 model from SIO. In Philippine Sea, as compared to V15.1, the accuracy of the model increased by about 8.2%.

关 键 词：海底地形 垂直重力梯度异常 重力异常 船测海深 地壳均衡 

分 类 号：P229.1[天文地球—大地测量学与测量工程]