On the Transition of Ice-Limit and Ice-Thickness for the Early Drift-Ice Season on the Okhotsk Sea

[摘要] The motion of ice-area composed of ice of any size when the thickness of individual ice constituting it is comparatively small may be determined by the surface current where it is floating and the drift current caused by wind.In the present study the transition of ice-limit and the increase of ice-thickness of drift-ice on the Okhotsk Sea during the so-called early drift-ice season are estimated theoretically using the equations based on the theories by Ekman and Zubov, etc. The estimated results are in general in good agreement with the actual states obtained from the weather messages from the ships of U.S.S.R. in 1956/57 to 1956/59.Thus, it is verified that the synoptic forecasting of ice-edge is certainly possible using the given transition chart of ice-limit (Fig. 1).

[学科分类] 大气科学