Abstract Temporal and spatial variations of sea water largely affect on the pattern of
underwater sound propagation. Acoustic environmental changes and their effects on
underwater sound propagation in the northern part of the East Sea, which have been poorly
studied mainly due to lack of observations, are investigated by analyzing the hydrographic
data acquired since 1993. Severe changes in acoustic environments are associated with
various physical processes such as deep convection, thermal fronts, and eddies in the  ...