Publication Date:
2022-05-25
Description:
Submitted in partial fulfillment of the requirements for the degree of Ocean Engineer at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution September 1990
Description:
Pulse-like acoustic signals are transmitted from an acoustic source near Oahu to seven
receivers off the west coast of the United States for a 124-day period in 1988. Acoustic
travel-time oscillations are observed in the received signal at periods between 15 and 23
hours, which are caused by barotropic (or first or second mode baroclinic) flu ctuations
in the ocean. It is shown that these fluctuations cannot be local processes isolated to
either the source or to the receivers. It is further shown that resonant barotropic gravity
wave modes (Platzman et al., 1981) are not consistent with the data. The cause of these
flu ctuations remains unresolved, but the data and other oceanographic measurements put
many constraints on the process causing these fluctuations.
Keywords:
Wave mechanics
;
Underwater acoustics
Repository Name:
Woods Hole Open Access Server
Type:
Thesis
Format:
application/pdf
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