用反射地震方法研究物理海洋-地震海洋学简介  

Reflection seismic methods for studying physical oceanography:Introduction of seismic oceanography

作　　者：宋海斌[1] 董崇志[1] 陈林[1] 宋洋[1] 

机构地区：[1]中国科学院地质与地球物理研究所地球深部重点实验室,北京100029

出　　处：《地球物理学进展》2008年第4期1156-1164,共9页Progress in Geophysics

基　　金：国家基础研究发展规划项目(2007CB411704);欧盟项目(FP6-2003-NEST15603)联合资助

摘　　要：地震海洋学是通过传统反射地震勘探方法研究物理海洋学的一种新方法.相对于传统的接触式温盐深测量方法,该方法具有较高的横向分辨率和能快速对整个海水剖面成像等优点,是一种非常有前途的新方法.本文将详细阐述反射地震方法在探测海洋锋温盐细结构、刻画水团边界、海洋内波、黑潮等方面的研究进展.目前海水层温度差异主要通过叠加剖面的反射轴振幅计算得到,但是叠加剖面并没有做真振幅处理.为了解决计算过程中的误差,最后提出在地震海洋学仲利用真振幅偏移结果可以使计算更加合理的设想.Seismic oceanography is a promising new tool for studies of physical oceanography which uses conventional low frequency marine seismic reflection techniques. Compared to the traditional methods of probing the ocean, they offer several advantages, such as enhanced lateral resolution, the ability to simultaneously image large sections of the ocean, and opportunities for three-dimensional and time-lapse imaging. The paper introduces the research progress on several important oceanic phenomena, including measuring thermohaline fine structure, imaging water mass boundaries, internal wave and the Kuroshio Current. Recently the seismic stacked sections are not considered as true ampli- tude processed, so the temperature contrasts, which are calculated by the amplitudes of post-stack sections, are not accurate. Finally, we present an idea of using new true amplitude migration method which can make the result more sense in seismic oceanography research.

关 键 词：地震海洋学 海洋锋 温盐细微结构 海洋内波 真振幅偏移 

分 类 号：P631[天文地球—地质矿产勘探]