Advances in Earth Science ›› 2020, Vol. 35 ›› Issue (7): 731-741. doi: 10.11867/j.issn.1001-8166.2020.057

Previous Articles     Next Articles

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)

Jun Ma,Jinming Song,Xuegang Li,Huamao Yuan,Ning Li,Liqin Duan,Qidong Wang. Geochemical Characteristics of Particulate Organic Carbon in the Kocebu Seamount Waters of the Western Pacific Ocean in Spring 2018[J]. Advances in Earth Science, 2020, 35(7): 731-741.

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.

No related articles found!
Viewed
Full text


Abstract