Abstract
For observing in detail the distribution of drift ice off the Okhotsk Sea coast of Hokkaido, a radar network was constructed in 1966-1968 by Sea Ice Research Laboratory, Hokkaido University.
This radar network allows a continuous monitor-ing of real-time ice field scenery along a 250 km coastline as far as about 60 km into the Okhotsk Sea. A series of 20-years long ice distribution records from 1969 to 1989 was obtained by this radar newtwork.
Based on these data,
1. The dates of appearance and disappearance of sea ice in the radar images, and the number of days of sea ice existing in the radar images were discussed statistically.
2. The relations between the ice amount off the Okhotsk Sea coast of Hokkaido and the air temper-ature along the shore were discussed.
3. Variations in ice amount off the Okhotsk Sea coast of Hokkaido were compared with those in the Sea of Okhotsk.
4. The relations between the variations in ice amount off the Okhotsk Sea coast of Hokkaido and the variations in the atmospheric pressure gradient were discussed.
