Full waveform inversion of reflection seismic data for ocean temperature profiles
Full waveform inversion of reflection seismic data for ocean temperature profiles
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DOI：
10.1029/2007gl032359
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发表时间：
2008-02
影响因子：
5.2
通讯作者：
W. Wood;W. Holbrook;Mrinal K. Sen;P. Stoffa
中科院分区：
文献类型：
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作者：
W. Wood;W. Holbrook;Mrinal K. Sen;P. Stoffa
我们表明，海洋温度廓线可以准确地恢复使用声学方法在海面上。使用拖曳式气枪阵列和水听器拖缆，热盐边界声穿透在一套频率和角度，产生走时轨迹和反射率。这些数据通过全波形反演来反演，以估计声速，并随后估计温度分布。高横向数据密度的地震技术提供了潜在的声学派生的温度剖面用于约束海洋混合和内波模型。实际合成数据的结果表明，当使用宽带数据时，在已知源函数和记录几何的情况下，可以以任意精度恢复声速。对实地地震数据的应用（经消耗性深海温度记录仪证实）表明，即使没有专门为地震海洋学校准的地震采集系统，海洋内的温度对比也可以恢复到1摄氏度以内。
We show that ocean temperature profiles can be accurately recovered using only acoustic methods employed at the sea surface. Using a towed air gun array and a hydrophone streamer, thermohaline boundaries are ensonified at a suite of frequencies and angles, yielding travel time trajectories and reflectivities. These data are inverted via full waveform inversion to estimate sound speed and, subsequently, a temperature profile. The high lateral data density of the seismic technique offers the potential of acoustically derived temperature profiles to be used to constrain models of ocean mixing and internal waves. Results on realistic synthetic data show that sound speed can be recovered with arbitrary accuracy when using broadband data, with known source function and recording geometry. Application to field seismic data (corroborated by expendable bathythermograph) shows that even with a seismic acquisition system not specifically calibrated for seismic oceanography, temperature contrasts within the ocean can be recovered to within one degree Celsius.