摘要
It is well known that vertical circulation of sea water is a common occurrence in the ocean. It is an integral part of the general circulation of ocean water, though its velocity is of a very small order, being 10-5cm/sec to 10-2cm/sec. However, its influence on fishery and climate cannot be neglected, for it causes the exchange of water in the upper and lower layers of the ocean. Hence, in recent years, more
