| Long-range correlations of microseism-band pressure fluctuations in the ocean - :14499 | Office of Oceanic and Atmospheric Research (OAR)
Stacks Logo
Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.
Clear All Simple Search
Advanced Search
Long-range correlations of microseism-band pressure fluctuations in the ocean
  • Published Date:
  • Source:
    Geophys. J. Intl., 206(2), 825-834.

There is no document associated.
  • Description:
    We investigate the spatial coherence of underwater ambient noise using a yearlong time-series measured off Ascension Island. Qualitative agreement with observed cross-correlations is achieved using a simple range-dependent model, constrained by earlier, active tomographic studies in the area. In particular, the model correctly predicts the existence of two weakly dispersive normal modes in the microseism frequency range, with the group speed of one of the normal modes being smaller than the sound speed in water. The agreement justifies our interpretation of the peaks of the measured cross-correlation function of ambient noise as modal arrivals, with dispersion that is sensitive to crustal velocity structure. Our observations are consistent with Scholte to Moho head wave coupled propagation, with double mode conversion occurring due to the bathymetric variations between receivers. We thus demonstrate the feasibility of interrogating crustal properties using noise interferometry of moored hydrophone data at ranges in excess of 120 km.

  • Document Type:
  • Supporting Files:
    No Additional Files
No Related Documents.
You May Also Like: