南海东北部地震海洋学联合调查与反演

通过地震海洋学联合调查航次，获得了同时采集的高分辨率多道地震数据与水文数据（XBT）联合调查数据.通过针对性处理获得了清晰的海洋水体反射地震剖面，捕捉到南海东北部次表层涡旋，证明了该调查方法的有效性.利用背景场约束反演方法得到海水的波阻抗、声速、密度、温度和盐度剖面，揭示了涡旋具有相对低速、高密、低温与高盐特征.处理和反演结果表明，在浅部和部分噪声较强和无约束反演区域，结果误差较大，可靠性较低.调查结果说明，获得较高信噪比的原始高分辨率地震资料采集技术方法、联合约束数据的获取、针对性的特殊处理方法和有效的反演方法是地震海洋学资料有效分析利用的重要保证.

Investigation and inversion of seismic oceanography dataset in the NE South China Sea

New high resolution multi-channel seismic data and hydrological data (XBT) are simultaneously obtained from the joint survey of seismic oceanography. A clear seawater seismic reflection profile, through targeted process, captures the subsurface eddies in the northeastern South China Sea, and proves the validity of this method. The impedance, sound velocity, density, temperature and salinity profiles of seawater were derived by means of background field constrained inversion method, which reveal that the eddies have characteristics of relatively low sound speed, high seawater density, low temperature and high salinity. The processing and inversion results show that in shallow water and areas with much noise or no constraints, the result may yield remarkable error and be less reliable. This survey implies that acquisition technique of high resolution seismic data with a higher signal-to-noise ratio, constraint data simultaneously obtained, special processing method and effective inversion method are guarantee of effective analysis of seismic oceanography dataset.