2015年02月24日

The coast waters facing the Sea of Okhotsk, in the northeast of Hokkaido, are usuallly packed with 'ryuhyo' drift ice for two months from the end of January.

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The Amur River flows into the north of the Sea of Okhotsk, which lowers the salt density of the sea near the mouth of that river. Consequently, the sea waters in that area are apt to get frozen in winter. This ice, coming all the way to Hokkaido blown in the wind, is what is called ryuhyo drift ice.
Sightseeing boats only to see this ryuhyo are in operartion in Abashiri City and Monbetsu City, Hokkaido, usually from January to March.
As plankton derived from the Amur River come with the ryuhyo, the vast sea area where the ryuhyo comes becomes rich in nutrition when spring arrives.   Thanks to the ryuhyo, Hokkaido enjoys one of the best fishing grounds in Japan.
It is a matter of concern, that the thickness and quantity of the ryuhyo are decreasing year after year supposedly resulting from global warming.

Licensed tour guide/travel consultant,
Masahisa Takaki.

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posted by masahisa at 11:45 | Hokkaido | このブログの読者になる | 更新情報をチェックする