Elucidation of novel interaction mechanism between biogenic silica and organic matter in the ocean

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K12579
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Environmental dynamic analysis
• Research Institution: The University of Tokyo
• Principal Investigator: OGAWA Hiroshi 東京大学, 大気海洋研究所, 准教授 (50260518)
• Research Collaborator: KIYAMA Kouji
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: 生元素動態 / 海洋物質循環 / 生物地球化学

Outline of Final Research Achievements

Measurement of colloidal biogenic silica (CBSi) was carried out for the first time with suspended particulate biogenic silica (PBSi) in a wide area of the central North Pacific that traverses the equator to the Chakchi Sea along the meridian section of western longitude 170 degrees, and the characteristics of its vertical and the north-south distributions were investigated. CBSi is a concentration level of approximately nM order, showing a feature that there are few differences by sea area and no vertical change compared to PBSi. It was suggested that CBSi, which had not been clear in the ocean, exists stably from the equator to the Arctic and from the surface to the deep layers.

Free Research Field

海洋生物地球化学