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应用烯酮化合物的不饱和比值Ｕ，计算得出冲绳海槽海水古温度波动幅度在１５．９～２６．２℃之间，平均为２２．９℃，和冬季实测表层水温２２．０℃相接近，探讨了Ｕ值在冲绳海槽指示的古海水温度和季节有关，主要反映在冬季．
Based on the unsaturated ratio U of enone compounds, the paleocontinental temperature fluctuation in the Okinawa Trough was calculated to be between 15.9 and 26.2 ℃, with an average of 22.9 ℃ and the measured surface water temperature of 22.0 ℃ in winter Close to, discussed the U value of paleo-sea water temperature in the Okinawa Trough and the seasons, mainly reflected in the winter.