Observations of ocean fluctuations between 15 and 23 hour periods in the Pacific

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.

Grantor dc:publisher

Massachusetts Institute of Technology and Woods Hole Oceanographic Institution

Year dc:date.issued

1990

Author dc:creator

• Blanding, Wayne R.

• Wave mechanics
• Underwater acoustics

Language dc:language.iso

en_US

DOI

10.1575/1912/5422

OAI identifier oai:identifier

oai:darchive.mblwhoilibrary.org:1912/5422