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“海洋四号”在执行ＤＹ９５－７和ＤＹ９５－９航次调查任务期间，在东太平洋我国开辟区做了２个测站的底层海流观测。观测资料分析表明，底层流的流速在１．２～１２．０ｃｍ／ｓ之间；底层流有月际和日际变化，并发现底层流存在“不活动”期。
During the missions of DY95-7 and DY95-9 voyages, Ocean No. 4 conducted the bottom current observation of 2 stations in the open area of the eastern Pacific. The analysis of observation data shows that the flow velocity of the bottom flow is between 1.2 and 12.0 cm / s; the bottom flow has the monthly and the interannual variation, and the “inactive” period of the bottom flow is found.