Characteristics of pulse propagation in Arctic Ocean were calculated by elastic Parabolic Equation (PE) method based on rotated Pade approximation. It was assumed that the transmitter was placed at 100 m of depth and that the frequency was 20 Hz. Propagation loss was estimated with the condition that the propagation path was 300 km when the thickness of the ice layer was changed. To estimate the arrival time of pulses, a simulation of eigen rays was used by ray theory. The sound pressure field in the vertical plane changed in proportion to the increment of the thickness of ice. It was predicted that the effect of an ice layer on the sea surface would be great because the last pulse incidents that occurred at a small grazing angle in the ice layer generated a shear wave. Therefore, the transmission loss was large compared to there being no ice. It is shown that we had to take account of the ice layer in sound propagation in Arctic Ocean.
