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对赤道东北太平洋海域表层沉积物间隙水中硅酸盐、磷酸盐和硝酸盐等营养盐的剖面分布三个航次的研究表明,研究区在采样深度内沉积物中有机质的分解以硝化作用为主。在水-沉积物界面附近硅酸盐、磷酸盐和硝酸盐都存在着极陡的浓度梯度,Fick扩散定理的计算结果表明,研究区内硅酸盐、磷酸盐和硝酸盐的海底扩散通量分别为-886.45～42.62μmol/(m2·d)、-3.04～5.83μmol/(m2·d)和-189.43～21.05μmol/(m2·d),且硅酸盐和硝酸盐主要是从沉积物向底层水体扩散,是底层水体营养盐的来源之一;研究区内硅酸盐、磷酸盐和硝酸盐的海底扩散通量存在着一定的时间和空间变化,这可能与因全球气候变化而导致的沉积环境的改变有关。
The cross-section distribution of nutrients such as silicates, phosphates and nitrates in surface sediment interstitial water in the equatorial northeastern Pacific Ocean shows that the decomposition of organic matter in the sediment in the study area is dominated by nitrification. The steep concentration gradients of silicate, phosphate and nitrate exist near the water-sediment interface. The Fick diffusion theorem results show that the seabed diffusion fluxes of silicates, phosphates and nitrates in the study area -886.45-42.62μmol / (m2 · d), -304-5.83μmol / (m2 · d) and -189.43-21.05μmol / (m2 · d), respectively, and silicates and nitrates were mainly formed from sediments Diffusion to the bottom water body is one of the sources of nutrients in the bottom water bodies. There is a certain time and space variation in the seabed diffusive fluxes of silicates, phosphates and nitrates in the study area, which may be due to the global climate change Of the sedimentary environment changes.