海洋氮循环中稳定氮同位素变化与地质记录研究进展

doi:10.11867/j.issn.1001-8166.2020.012

地球科学进展 ›› 2020, Vol. 35 ›› Issue (2): 167 -179. doi: 10.11867/j.issn.1001-8166.2020.012

朱艳宸(

),李丽(

),王鹏,贺娟,贾国东

海洋地质国家重点实验室海洋与地球科学学院同济大学，上海 200092

收稿日期:2019-09-23 修回日期:2020-01-10 出版日期:2020-02-10
通讯作者: 李丽 E-mail:1731659@tongji.edu.cn;lilitju@tongji.edu.cn
基金资助:
国家自然科学基金项目“南海沉积物中支链四醚膜脂的组成和碳同位素特征及其对古气候研究的启示”(41673042);“珠江口深古菌(Bathyarchaeota┫碳源利用特征研究”┣41776134)

Progress in the Study of Marine Stable Nitrogen Isotopic Changes and Its Geological Records

Yanchen Zhu( ),Li Li( ),Peng Wang,Juan He,Guodong Jia

State Key Laboratory of Marine Geology, School of Ocean and Earth Sciences, Tongji University，Shanghai 200092，China

Received:2019-09-23 Revised:2020-01-10 Online:2020-02-10 Published:2020-03-24
Contact: Li Li E-mail:1731659@tongji.edu.cn;lilitju@tongji.edu.cn
About author:Zhu Yanchen (1994-)， female， Yangzhou City， Jiangsu Province， Master student. Research areas include marine biogeochemistry and paleoclimate. E-mail： 1731659@tongji.edu.cn
Supported by:
the National?Natural?Science?Foundation?of?China “Composition and carbon isotopic characteristics of branched tetraethers in the sediments of the South China Sea and its implications for the study of paleo-climate”(41673042);“The study of carbon sources of Bathyarchaeota in the Pearl River Estuary”(41776134)

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海洋氮稳定同位素信号包含了关键的生物地球化学信息，是辨识海洋氮来源、了解海洋氮循环过程的重要途径和手段，该信号通过海洋沉降传递可保存在海洋沉积物中，用以追溯地质历史时期海洋系统中的生物地球化学循环和海洋环境演变。近几十年的研究表明，固氮作用和反硝化作用在海洋氮循环中发挥着关键作用，但海洋环境的时空多变、海洋氮循环过程和物质来源复杂，未来需要结合现代观测、地质记录，综合海洋、生物、地质多个学科，考虑水文环境、地质过程和气候演变等多种因素，才能深刻理解海洋氮循环和气候、环境变化的耦合关系。

关键词: 稳定氮同位素, 硝酸盐, 颗粒氮, 海洋沉积物, 古海洋记录

Marine stable nitrogen isotope containing much key biogeochemical information, is an important way in identifying marine nitrogen sources and understanding the marine nitrogen cycles. These isotopic signals can be preserved in marine sediments and used to trace the marine biogeochemical cycles and environment changes during geological history. Studies in recent decades have illustrated the key role of nitrogen fixation and denitrification. Because of the spatiotemporal variability and the complexity of ocean processes and nitrogen sources in the marine environment, we need to combine the modern observations with geological records, integrate oceanography, biology, and geology, and consider the hydrological environment, geological processes and climate changes, to understand the coupling between the ocean nitrogen cycle， climate and environmental changes.

Key words: Stable nitrogen isotope, Nitrate, Particulate nitrogen, Marine sediments, Paleoceanography records

中图分类号:

P736.4

图1 海洋环境中的典型稳定氮同位素变化（据参考文献[ 2 , 3 , 4 , 5 , 6 ]修改）

Fig. 1 Typical stable nitrogen isotope changes in the marine environment (modified after references [2~6])

图2 不同海域垂向硝酸盐含量(空心圆圈)、硝酸盐(实心圆圈)及颗粒物(蓝色实心三角)稳定氮同位素变化模式(据参考文献[ 15 , 16 , 17 , 18 ]修改)

Fig. 2 Vertical variability of nitrate content (hollow circle) and stable nitrogen isotope of nitrate (solid circle) and sinking particles (blue solid triangle) in different sea areas (modified after references [15~18])

图3 全球不同大洋沉降颗粒（矩形）或硝酸盐（圆形）与表层沉积物的稳定氮同位素对比(据参考文献[ 49 ]修改)

Fig. 3 Stable nitrogen isotope comparison of sinking particles (rectangular) or nitrate (circular) with surface sediments from global oceans in different sites (modified after reference [ 49 ])

图4 不同类型海域末次冰期以来海洋沉积物δ¹⁵N_bulk记录对比
据参考文献[ 69 ]修改:智利海盆(黑) ^{[

70
]}，阿拉伯海(蓝) ^{[

71
]}；卡里亚科海盆(红) ^{[

69
]}

Fig. 4 Comparison of δ¹⁵N_bulk records of sediments since the last glaciation in different seas
Modified after reference [ 69 ]: Chile basin (Black) ^{[

70
]}, Arabian Sea (Blue) ^{[

71
]}; Cariaco Basin (Red) ^{[

69
]}

图5 不同类型海域50 ka沉积物稳定氮同位素记录对比（据参考文献[ 69 , 88 ]修改）
卡里亚科海盆（蓝色）沉积物 δ ¹⁵N _bulk ^{[

79
]}；阿拉伯海（棕红）沉积物 δ ¹⁵N _bulk ^{[

19
]}；南海沉积物 δ ¹⁵N _bulk (黑色) ^{[

86
]}和FB- δ ¹⁵N（绿色） ^{[

89
]};阴影部分为间冰期，数字为海洋同位素阶段

Fig. 5 Comparison of stable nitrogen isotope records for 50 ka sediments in different types of seas (modified after references [69,88]）
Cariaco basin (blue) sediments δ ¹⁵N _bulk ^{[

79
]}; Arabian sea (brown red) sediments δ ¹⁵N _bulk ^{[

19
]} The South China Sea sediments δ ¹⁵N _bulk (black) ^{[

86
]} and FB- δ ¹⁵N (green) ^{[

89
]}. The shaded part is the interglacial period, and the figure is the Marine Isotope Stage(MIS)

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