A Survey of the Impact on Acoustic Propagation of Warm Core Ocean Eddys

• Main Authors: Browning, David G., Monti, Joseph M., Petitpas, Linda S.
• Other Authors: NAVAL UNDERSEA WARFARE CENTER DIV NEWPORT RI
• Format: Text
• Language: English
• Published: 1993
• Subjects: Physical and Dynamic Oceanography; Acoustic Detection and Detectors; *ACOUSTIC WAVES; *EDDIES(FLUID MECHANICS); *UNDERWATER ACOUSTICS; VELOCITY; FREQUENCY; ENERGY; VARIATIONS; SHALLOW WATER; WAVE PROPAGATION; SOUND; GREENLAND SEA; NORWEGIAN SEA; OCEAN ENVIRONMENTS; ACOUSTIC VELOCITY; PACIFIC OCEAN; ATLANTIC OCEAN; OCEANS; RECEIVERS; PROFILES; SURFACES; TRACKING; ACOUSTIC DETECTION; TEMPERATURE; CORES; Norwegian Sea; Greenland; Pacific; Greenland Sea
• Online Access: http://www.dtic.mil/docs/citations/ADA272188; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA272188

Warm core eddys have been found throughout the oceans of the world. Most have a bowl-like shape extending down from the surface, which, along with an increased sound speed due to the warmer water core, causes more acoustic energy to be refracted toward the surface than would occur without an eddy present. However, the impact on acoustic propagation varies significantly from ocean to ocean, because of variations in eddy size and core temperature, as well as sound speed profile differences in the adjoining waters. Examples are given from the North and South Atlantic Oceans, North and South Pacific Oceans, Greenland and Norwegian Seas.