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根据1986—1990中美热带西太平洋海气相互作用8个航次合作综合调查资料，分析了1987年10月赤道中西太平洋165°E（10°N－6°S）次表层水形成溶解氧最大值的原因。1986－1987年E1Nino衰退时期，该海域赤道附近在E1Nino强盛时期下沉的次表层水开始回升，短时期内形成了类似于中、高纬度海域的理化环境，使浮游生物在混合层内聚集生长，最终导致溶解氧含量在次表层出现最大值和过饱和含量。
According to the comprehensive survey data of 8 voyage interactions of the Sino-US tropical west Pacific air between 1986 and 1990, the maximum value of dissolved oxygen formation in sub-surface water at 165 ° E (10 ° N-6 ° S) in the central and western equatorial Pacific in October 1987 was analyzed s reason. Sub-surface water subsided near the equator of E1Nino in 1986-1987 during the recession of E1Nino began to rise. In a short period of time, a physical and chemical environment similar to those in the middle and high latitudes was formed, allowing plankton to accumulate in the mixing layer , Eventually leading to the maximum dissolved oxygen content in the subsurface and supersaturated content.