SOUND PROPAGATION THROUGH AN OCEANIC FRONT

• Main Authors: Dreini, G., Jensen, F.
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 1990
• Subjects: [PHYS.HIST]Physics [physics]/Physics archives; Arctic; Faroe-Iceland Ridge; Iceland
• Online Access: https://hal.science/jpa-00230569; https://hal.science/jpa-00230569/document; https://hal.science/jpa-00230569/file/ajp-jphyscol199051C2240.pdf; https://doi.org/10.1051/jphyscol:19902240

The effect of ocean fronts on long-range sound propagation in the ocean has been investigated theoretically. A numerical model of the parabolic equation (PE) type was used for simulating propagation across a real front observed on the Faroe-Iceland Ridge in October 1985. The front separating warm Atlantic water from cold Arctic water had horizontal sound speed changes of 30 m/s over a range of 50 km. The acoustic effects of the front for a 150 km transmission path were found to be significant (> 10 dB), but with strong dependence on environmental parameters as well as on source/receiver depths and frequency.