本文使用VG-5400稀有气体同位素质谱计,测量了100个西太平洋上层海水(≤300m)的He同位素组成,论述了He同位素的分布特征以及北太平洋中层水随赤道上升流上涌造成的~3He过剩和南海与太平洋海水的交换产生的~3He亏损,并运用He同位素示踪特性探讨了海域不同水团的混合作用。研究还表明He同位素可以用来指示海洋的环流。 In this paper, the He isotope compositions of 100 western Pacific upper seawater (≤300m) were measured using the VG-5400 Rare-gas Isotope Mass Spectrometer. The distribution characteristics of He isotopes and the ~ 3He upwelling of the mid-level water in the North Pacific Ocean Excess and the ~ 3He loss produced by the exchange between the South China Sea and the Pacific Ocean, and discussed the mixing effect of different water masses by using He isotope tracing. Studies have also shown that He isotopes can be used to indicate ocean circulation.