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    NPAL04 OBS data analysis part 1 : kinematics of deep seafloor arrivals

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    WHOI-2008-03.pdf (39.97Mb)
    Date
    2008-12
    Author
    Stephen, Ralph A.  Concept link
    Bolmer, S. Thompson  Concept link
    Udovydchenkov, Ilya A.  Concept link
    Worcester, Peter F.  Concept link
    Dzieciuch, Matthew A.  Concept link
    Van Uffelen, Lora J.  Concept link
    Mercer, James A.  Concept link
    Andrew, Rex K.  Concept link
    Buck, Linda J.  Concept link
    Colosi, John A.  Concept link
    Howe, Bruce M.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/2725
    DOI
    10.1575/1912/2725
    Keyword
     Ocean bottom seismology; Ocean acoustic propagation; Bottom interaction 
    Abstract
    These notes provide supporting information for a JASA (Journal of the Acoustical Society of America) LttE (Letter to the Editor) manuscript, "Deep seafloor arrivals: A new class of arrivals in long-range ocean acoustic propagation" (Stephen et al., submitted). It addresses five issues raised by the co-authors: 1) incorrect processing for the time-compressed traces at T2300 and T3200 that appeared in an early version of the LttE (T2300, T3200 … refer to transmissions at 2300, 3200km etc from the DVLA (Deep Vertical Line Array)), 2) processing issues, including the trade-offs between coherent and incoherent stacking and corrections for the effects of moving sources and receivers and tidal currents (Doppler), 4) the distinction between "deep shadow zone arrivals", which occur below the turning points in Parabolic Equation (PE) models, and "deep seafloor arrivals", which appear dominantly on the Ocean Bottom Seismometer (OBS) but are either very weak or absent on the deepest element in the DVLA and do not coincide with turning points in the PE model (some of these OBS late arrivals occur after the finale region), 4) the role of surface-reflected bottomreflected (SRBR) paths in explaining the late arriving energy, and 5) generally reconciling the OBS analysis with work by other North Pacific Acoustic Laboratory (NPAL) investigators and Dushaw et al (1999).
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    • Geology and Geophysics (G&G)
    • WHOI Technical Reports
    Suggested Citation
    Stephen, R. A., Bolmer, S. T., Udovydchenkov, I., Worcester, P. F., Dzieciuch, M. A., Van Uffelen, L., Mercer, J. A., Andrew, R. K., Buck, L. J., Colosi, J. A., & Howe, B. M. (2008). NPAL04 OBS data analysis part 1: kinematics of deep seafloor arrivals. Woods Hole Oceanographic Institution. https://doi.org/10.1575/1912/2725
     

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