Basin-scale tidal measurements using acoustic tomography
By: by Robert Hugh Headrick
Contributors: Massachusetts Institute of Technology
Publisher: Available from the National Technical Information Service
Published: 1990
Place of publication: Springfield, Va
Language: eng
Number of pages: 47
Subjects: Tomography
Description: Travel-times of acoustic signals were measured between a bottom-mounted source near Oahu and four bottom-mounted receivers located near Washington Oregon, and California in 1988 and 1989,  This paper discusses the observed tidal signals.  At three out of four receivers, observed travel times at M2 and S2 periods agree with predictions from barotropic tide models to within ±30° in phase and a factor of 1.6 in amplitude.  The discrepancy at the fourth receiver can be removed by including predicted effects of phase-locked baroclinic tides generated by seamounts.  Our estimates of barotropic M2 tidal dissipation by seamounts vary between 2 x 10¹ and 1x10¹ erg·s¹.  The variation by two orders of magnitude is due to uncertainties in the numbers and sizes of seamounts.  The larger dissipation (1x10¹ erg·s¹) is the same order as previous estimates and amounts to 4% of the tota
Notes: "September 1990."

Thesis (Degree of Ocean Engineer and M.S. in Ocean Engineering) Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution, Sept. 1990.

Includes bibliographic references (p.45-47).