Abstract
This paper examines the effect of inhomogeneous water on seismic imaging in deep water areas. An appropriate partial differential equation is derived for the acoustic pressure field in inhomogeneous water, including current effects. Seismic wavefields are simulated and the results show that the traveltime of seismic waves can be affected. The maximum traveltime perturbation at zero offset is 20 ms. In particular, the structure of horizontal reflectors below the water is distorted by mesoscale eddies. Variations of water temperature are the fundamental cause of the distortion. Finally, a calibration method for the distortion of seismic imaging caused by inhomogeneous water is presented.
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References
Ruddick B. Sounding out ocean fine structure. Science, 2003, 301: 772–773
Krahmann G, Brandt P, Klaeschen D, et al. Mid-depth internal wave energy off the Iberian Peninsula estimated from seismic reflection data. J Geophys Res, 2008, 113: C12016
Song H B, Luis P, Wang D X, et al. Seismic images of ocean mesoscale eddies and internal waves (in Chinese). Chin J Geophys, 2009, 52: 2775–2780
Pinheiro L M, Song H, Ruddick B, et al. Detailed 2-D imaging of the Mediterranean outflow and meddies off W Iberia from multichannel seismic data. J Mar Syst, 2010, 79: 89–100
Wood W T, Holbrook W S, Sen M K, et al. Full wave form inversion of reflection seismic data for ocean temperature profiles. Geophys Res Lett, 2008, 35: L04608
Song H B, Dong C Z, Chen L, et al. Reflection seismic methods for studying physical oceanography: Introduction of seismic, oceanography (in Chinese). Progr Geophys, 2008, 23: 1156–1164
Gonella J, Michon D. Deep internal waves measured by seismic-reflection within the Eastern Atlantic water mass. Cr Acad Sci II, 1988, 306: 781–787
Phillips J D, Dean D F. Multichannel Acoustic Reflection Profiling of Ocean Watermass Temperature/Salinity Interfaces. New York: Springer, 1991. 199–214
Holbrook W S, Paramo P, Pearse S, et al. Thermohaline fine structure in an oceanographic front from seismic reflection profiling. Science, 2003, 301: 821–824
Nandi P, Holbrook W S, Pearse S, et al. Seismic reflection imaging of water mass boundaries in the Norwegian Sea. Geophys Res Lett, 2004, 31: L23311
Nakamura Y, Noguchi T, Tsuji T, et al. Simultaneous seismic reflection and physical oceanographic observations of oceanic fine structure in the Kuroshio extension front. Geophys Res Lett, 2006, 33: L23605
Biescas B, Sallare S V, Pelegr J L, et al. Imaging meddy fine structure using multichannel seismic reflection data. Geophys Res Lett, 2008, 35: L11609
Cheng X H, Qi Y Q, Wang W Q. Seasonal and interannual variabilities of mesoscale eddies in South China Sea (in Chinese). J Trop Oceanogr, 2005, 24: 51–59
Guo Y J, Fang W D, Fang G H, et al. Temporal and spatial variation characteristics of the surface circulation in the South China Sea based on eleven-year altimeter data (in Chinese). Chin Sci Bull (Chin Ver), 2006, 51: 1–8
Ji L L, Lin M. Numerical analysis of the effect of mesoscale eddies on seismic imaging. Pure Appl Geophys, 2013, 170: 259–270
Kormann J, Cobo P, Prieto A. Perfectly matched layers for modelling seismic oceanography experiments. J Sound Vib, 2008, 317: 354–365
Henrick R F, Siegmann W L, Jacobson M J. General analysis of ocean eddy effects for sound transmission applications. J Acoust Soc Am, 1977, 62: 860–870
Ji L L, Lin M. The distortion of seismic imaging in the presence of mesoscale eddies and analysis of influencing factors (in Chinese). Chin J Geophys, 2013, 56: 195–203
Ji L L. Numerical analysis of the effect of mesoscale eddies on seismic imaging (in Chinese). Dissertation for the Doctoral Degree. Beijing: Graduate University of Chinese Academy of Sciences, 2012
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Ji, L., Lin, M. & Hao, T. The effect of inhomogeneous water on seismic imaging in deepwater areas of the South China Sea. Chin. Sci. Bull. 58, 4443–4449 (2013). https://doi.org/10.1007/s11434-013-5975-z
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DOI: https://doi.org/10.1007/s11434-013-5975-z