Also known as drift bottles. These are artificial drift objects used to learn about the movement of the ocean's surface. They are made of beer bottle-sized glass bottles or plastic. The location and date of throwing are written down, and a postcard for the location and date of picking up is inserted inside. In Japan, Yuji Wada threw 400 of these bottles off the coast of Sanriku in 1893, and later used tens of thousands of drift bottles to study the distribution of ocean currents in the waters around Japan. Source : Heibonsha Encyclopedia About MyPedia Information |
漂流瓶とも。海水の表層の移動を知るための人為的漂流物。ビール瓶大のガラス瓶やプラスチックが用いられる。投入の位置・日時を記入し,拾ったときの位置・日時記入用のはがきを入れておく。日本では1893年に和田雄治が400本を三陸沖に投入,その後数万本の海流瓶で日本近海の海流分布を調べたのが始まり。
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