Abstract
A simulation study of the influence of thermohaline steps on under‐ice acoustic propagation has been made using a surface representation of hard layered ice with a water‐to‐ice transition region and a “stair‐step” sound velocity profile (SVP) in the water. The ice surface was modeled using parallel layers of varying thicknesses, each layer being homogeneous in density, compressional velocity and attenuation, and shear velocity and attenuation. A water‐to‐ice transition region [S. A. Chin‐Bing, J. Acoust. Soc. Am. Suppl. 1 78, S57 (1985)] was included to allow a gradual transition from the water to the multilayered ice. The water region contained the stair‐step SVP that is often found in regions containing thermohaline steps [S. A. Chin‐Bing and D. B. King, J. Acoust. Soc. Am. Suppl. 1 76, S84 (1984)]. Results indicate that the transmission loss structure is affected by both the stair‐step SVP and the water‐to‐ice transition region.
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