极地海域硝酸盐氮、氧同位素组成及南极半岛海域的硝化作用

• Main Author: 陈倩娜
• Other Authors: 陈敏
• Format: Thesis
• Language: Chinese
• Published: 2018
• Subjects: 硝酸盐δ15N和δ18O值; 分馏因子（ε）; 硝化速率; 白令海; 南极半岛; δ15N and δ18O of nitrate; fractionation factor (ε); nitrification rate; the Bering Sea; the Antarctic Peninsula; Arctic; Antarctic; The Antarctic; Antarctic Peninsula; Bering Sea; Antarc*
• Online Access: https://dspace.xmu.edu.cn/handle/2288/167983

本研究依托中国第6次北极科学考察和中国第32次南极科学考察航次，开展了白令海和南极半岛附近海域硝酸盐氮、氧同位素组成，以及南极半岛附近海域硝化速率的研究，目的在于揭示研究海区硝酸盐氮、氧同位素组成的分布规律及其影响因素，利用同位素模型计算浮游生物同化吸收硝酸盐过程氮、氧同位素的分馏因子和白令海盆区颗粒物再矿化所产生硝酸盐的δ15N值，探讨影响南极半岛附近海域硝化速率空间变化的因素。 白令海盆区和陆坡区表层水体硝酸盐的δ15N和δ18O值较高。在真光层中，硝酸盐δ15N和δ18O值随着深度的增加而降低，且与硝酸盐浓度的变化呈镜像对称关系，说明浮游植物同化吸收是影响真光层硝酸盐氮、氧同位素组成变. Nitrogen and oxygen isotopic compositions of nitrate and nitrification rate were measured in the Bering Sea during the 6th Chinese Arctic Research Expedition and in the Antarctic Peninsula during the 32nd Chinese Antarctic Research Expedition. Spatial variations of nitrate δ15N and δ18O value and their controlling factors were discussed. The fractionation factors of nitrogen and oxygen isotope dur. 学位：理学硕士 院系专业：海洋与地球学院_海洋化学 学号：22320141151302