表层海水硅同位素的分布特征及其影响因素  

Distributions of silicon isotopes of dissolved silicate in the surface seawater from global oceans

作　　者：倪建宇 付锋 王渊 姚旭莹 Ni Jianyu;Fu Feng;Wang Yuan;Yao Xuying(Key Laboratory of Submarine Geosciences,Second Institute of Oceanography,Ministry of Natural Resources,Hangzhou 310012,China)

机构地区：[1]自然资源部第二海洋研究所自然资源部海底科学重点实验室,浙江杭州310012

出　　处：《海洋学报》2021年第2期1-8,共8页

基　　金：大洋矿产资源勘探开发专项基金项目(DY135-S1-1-08,DY135-E2-1-01)。

摘　　要：本文分析了采集自太平洋、印度洋和大西洋的表层海水溶解硅酸盐的δ^(30)Si值,结果表明,太平洋表层海水的δ^(30)Si值为0.45‰~2.91‰,平均值为(1.52±0.59)‰;印度洋表层海水的δ^(30)Si值为0.98‰~2.30‰,平均值为(1.52±0.36)‰;大西洋表层海水的δ^(30)Si值为0.90‰~2.23‰,其平均值为(1.55±0.35)‰。硅同位素在各大洋表层,主要表现出与大洋表层环流和经向翻转流的相关性,其分布特征受表层水体中的生物活动以及表层洋流运动导致的不同水团之间的混合的影响,且混合作用可能对开放大洋表层水体的δ^(30)Si分布具有显著的影响。We analyzedδ^(30)Si of dissolved silicate of surface seawater from the Pacific Ocean,Indian Ocean and Atlantic Ocean.The results showed that theδ^(30)Si of the Pacific Ocean surface seawater was 0.45‰−2.91‰,with an average value of(1.52±0.59)‰;theδ^(30)Si of the Indian Ocean surface seawater was 0.98‰−2.30‰,with an average value of(1.52±0.36)‰;theδ^(30)Si value of the Atlantic Ocean surface seawater was 0.90‰−2.23‰,the average value was(1.55±0.35)‰.The silicon isotope in the ocean surface layer mainly shows the correlation with the ocean surface circulation and meridional overturning current,and its distribution characteristics are mainly affected by the biological activities in the surface water and the mixing between different water masses caused by the movement of the surface ocean currents.The mixing effect perhaps has a significant effect on the distribution ofδ^(30)Si in the surface water of the open oceans.

关 键 词：δ^(30)Si 表层海水 溶解硅酸盐 全球海洋 

分 类 号：P736.4[天文地球—海洋地质]