地球科学进展 ›› 2020, Vol. 35 ›› Issue (7): 731 -741. doi: 10.11867/j.issn.1001-8166.2020.057

研究论文 上一篇    下一篇

2018年春季西太平洋 Kocebu海山区海水中颗粒态有机碳的地球化学特征
马骏 1, 2, 3, 4( ),宋金明 1, 2, 3, 4( ),李学刚 1, 2, 3, 4,袁华茂 1, 2, 3, 4,李宁 1, 2, 3, 4,段丽琴 1, 2, 3, 4,王启栋 1, 2, 3, 4   
  1. 1.中国科学院海洋研究所 中国科学院海洋生态与环境科学重点实验室,山东 青岛 266071
    2.青岛海洋科学与技术国家实验室 海洋生态与环境科学功能实验室,山东 青岛 266237
    3.中国科学院大学,北京 100049
    4.中国科学院海洋大科学研究中心,山东 青岛 266071
  • 收稿日期:2020-05-10 修回日期:2020-06-20 出版日期:2020-07-10
  • 通讯作者: 宋金明 E-mail:mjqdio@163.com;jmsong@qdio.ac.cn
  • 基金资助:
    科技基础资源调查专项项目“西太平洋典型海山生态系统科学调查”(2017FY100802);国家自然科学基金项目“西太平洋最小含氧带对基于生物泵传输效率的生源要素循环的影响”(91958103)

Geochemical Characteristics of Particulate Organic Carbon in the Kocebu Seamount Waters of the Western Pacific Ocean in Spring 2018

Jun Ma 1, 2, 3, 4( ),Jinming Song 1, 2, 3, 4( ),Xuegang Li 1, 2, 3, 4,Huamao Yuan 1, 2, 3, 4,Ning Li 1, 2, 3, 4,Liqin Duan 1, 2, 3, 4,Qidong Wang 1, 2, 3, 4   

  1. 1.Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
    2.Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
    3.University of Chinese Academy of Sciences, Beijing 100049, China
    4.Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
  • Received:2020-05-10 Revised:2020-06-20 Online:2020-07-10 Published:2020-08-21
  • Contact: Jinming Song E-mail:mjqdio@163.com;jmsong@qdio.ac.cn
  • About author:Ma Jun (1992-), male, Laizhou City, Shandong Province, Ph.D student. Research areas include marine biogeochemistry. E-mail: mjqdio@163.com
  • Supported by:
    the National Key Research and Development Program of China “Science survey of typical seamount ecosystems in the Western Pacific Ocean”(2017FY100802);The National Natural Science Foundation of China “Effect of oxygen minimum zone on the circulation of biogenic elements based on the transmission efficiency of biological pumps”(91958103)

海山区颗粒有机碳的地球化学特征研究对深入认知大洋海山生态系统的物质循环过程具有重要意义。基于2018年3月对西太平洋Kocebu海山的综合调查,探讨了Kocebu海山区海水中颗粒有机碳的分布、来源及组成等地球化学特征。结果表明,随着水深的增加, 颗粒有机碳浓度逐渐降低,并在接近海山底部的水层中略有回升。在各水团中,颗粒有机碳平均浓度的大小依次为北太平洋热带水大于北太平洋中层水大于底层水,其中在底层水中,山顶附近站位的颗粒有机碳浓度低于远离海山的站位。海山山顶上方750~1 500 m水层中存在上升流,进而在该区域内形成颗粒有机碳浓度12.50 μg/L等值线隆起,但未形成“海山效应”。Kocebu海山区的颗粒有机碳主要为海源输入,颗粒有机碳/颗粒态有机氮平均值为3.75。在0~300 m的水层中,仅叶绿素最大值层中的颗粒有机碳/叶绿素a小于200,表明该水层中颗粒有机碳主要为生命态形式;而300 m水层中,颗粒有机碳/叶绿素a急剧升高,非生命态颗粒有机碳在总颗粒有机碳中贡献最大。

The study of the geochemical characteristics of the POC in the seamount area will be of great significance for further understanding the material cycle process in the seamount ecosystem. Based on a comprehensive survey of the Kocebu seamount in the Western Pacific Ocean in March, 2018, the distribution, source and composition of Particulate Organic Carbon (POC) in the seawater of the Kocebu seamount area were discussed. The results showed that the concentration of POC in the Kocebu seamount area gradually decreased with the increasing water depth, and slightly rose in the water layers near the bottom of the seamount. The average concentration of POC in each water mass was sorted from high to low in the order of North Pacific Tropic Water, North Pacific Intermediate Water and Deep Water (DW), and the concentration of POC at stations near the seamount summit was lower than that far from the seamount in the DW. There was upwelling at the water layers of 750~1 500 m above the seamount summit, causing the uplift of the 12.50 μg/L POC isoline in this region, however, no “seamount effect” was formed. The POC was mainly imported from the sea with an average POC/PON of 3.75. At the water layers of 0~300 m, only the POC/chlorophyll a (Chl a) at deep chlorophyll maximum layer was less than 200, indicating that the POC in this region was mainly in a form of life, while at the water layer of 300 m, the POC/Chl a increased sharply, indicating that the non-living POC contributed the most to the total POC.

中图分类号: 

图1 Kocebu海山区的调查站位图
(a) 海山位置图;(b) 站位设置图;(c) A和B断面
Fig.1 Sampling stations in the Kocebu seamount area
(a) Location map of seamount; (b) Station setting map; (c) Section A and B
图2 Kocebu海山区的水团分布图
Fig.2 The distribution of water masses in the Kocebu seamount area
表1 Kocebu海山区各水团中的温度、盐度和 POC分布
Table 1 The distribution of temperature, salinity and POC in different water masses in the Kocebu seamount area
图3 Kocebu海山区 5 0001 000 m水深中 POC的垂直分布
Fig.3 The vertical distribution of POC at 5 000 and 1 000 m in the Kocebu seamount area
图4 Kocebu海山区 AB断面中 POC和温度的分布
Fig.4 The distribution of POC and temperature in section A and B of the Kocebu seamount area
图5 Kocebu海山区不同水团中 POC的水平分布
Fig.5 The horizontal distribution of POC in different water masses of the Kocebu seamount area
图6 Kocebu海山区 PONDONO 3-N的垂直分布
Fig.6 The vertical distribution of PON, DO and NO 3-N in the Kocebu seamount area
表2 Kocebu海山区 0~300 m水层中 Chl aPOC/Chl a的分布
Table 2 The distribution of Chl aPOC/Chl a at 0~300 water layers in the Kocebu seamount area
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