印尼海啸区附近海域沉积物声速测量及声学特性分析  

Ultrasonic characteristics of sediment core near tsunami area of Indonesia

作　　者：周建平[1] 陶春辉[1] 顾春华[1] 何拥华[1] 张金辉[1] 

机构地区：[1]国家海洋局第二海洋研究所国家海洋局海底科学重点实验室

出　　处：《海洋学报》2008年第3期56-61,共6页

基　　金：国家海洋局青年基金资助项目(2007315);国家自然科学基金资助项目(NSFC40776038)

摘　　要：介绍了沉积物柱状样超声透射法测量方法和原理。对印尼海啸区附近海域沉积物柱状样进行了现场测量,通过测量数据的处理和分析,给出了沉积物的垂向声速剖面。讨论了声速与频率的关系,指出声速具有随频率的0.1次方增大的频散特性。分析沉积深度、结构以及生物扰动等方面的因素对声学测量结果的影响,结果表明海底地震引起的沉积物变迁、沉积物结构扰动、气体的混入等对声速的测量结果均产生影响。The measurement and principle of ultrasonic measurement of sediment core are introduced. The core sample near tsunami area of Indonesia in 2004 has been measured. The velocity of vertical profile in sediment was presented through the processing and analyzing of data. The relationship is discussed and given between the velocity and the frequency. Analyzing the influence of the depth, structure and biology content of sediment on the velocity data indicates that structure disturbing and gas mixing of marine sediment by the seafloor earthquake have much influence on the velocity of sediment.

关 键 词：海啸 声学测量 沉积物柱状样 

分 类 号：P744.3[天文地球—海洋科学]