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全世界海洋面积达3亿6000万平方公里,覆盖地球表面约70.8%。海水流动性高,连接太平洋、印度洋及大西洋的海水成分大致相同。海洋传输动力主要有两种方式,一种是由海水温度及盐度不同造成密度差异,使海水上下移动的温盐流;另一种是由地球风力带引的表面洋流。由于海洋的循环流通,世界上临海国家都有平等机会去发展海洋资源。
The world’s marine area amounts to 360 million square kilometers, covering about 70.8% of the Earth’s surface. Sea water is highly mobile and has about the same seawater composition as the Pacific, Indian and Atlantic Oceans. There are mainly two kinds of motive force for ocean transmission: one is the temperature and salt flow which makes the seawater move up and down due to the density difference caused by the temperature and salinity of the sea water; the other is the surface current induced by the earth’s wind force. Owing to the circular circulation of the oceans, all the countries in the world on the seafront have equal opportunities to develop their marine resources.