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 August 1993
Description:
Travel time perturbations of adiabatic normal modes due to an internal tide and
internal mode field in the Barents Sea are examined. A formalism for the travel time
perturbation due to a change in sound speed is presented. Internal tide and internal
wave amplitude spectra are calculated from Brancker temperature loggers which were
deployed on moorings in the Barents Sea during the August 1992 Barents Sea Polar
Front Experiment. In particular, the first three internal wave mode amplitudes are
estimated from the four Brancker temperature loggers on the southwest mooring of
the array. Modal perturbations in acoustic pulse travel time and the travel time
covariance are calculated and compared for consistency to a simple ray model. These
perturbations are small for the modal arrivals that the vertical acoustic array which
was deployed is expected to resolve. The third internal wave mode has the largest
impact on the acoustic arrivals, per unit amplitude, but the first internal wave mode
dominates the scattering due to having a much larger amplitude overall.
Keywords:
Internal waves
;
Ocean circulation
;
Acoustic surface waves
Repository Name:
Woods Hole Open Access Server
Type:
Thesis
Format:
application/pdf
