Comparison between the North and South Pacific Oceans of Acoustic Propagation in Secondary Sound Channels.
NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CT NEW LONDON LAB
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This document is a summary of the extent and causes of secondary sound channel formation in the Pacific Basin. In the North Pacific above 40 deg North latitude and in the Western Pacific near the equator, both regions where the average precipitation is greater than evaporation, secondary sound channels due to temperature inversions are found over extensive areas. In the Central South Pacific and to a lesser extent in the Subantarctic region, secondary sound channels are principally caused by water mass intrusion. A third mechanism, circulation instability, is found locally near major currents and outflows throughout the Basin.
- Physical and Dynamic Oceanography