Development of ocean iron cycle model considering colloidal pumping

2016 Fiscal Year Final Research Report

• Project/Area Number: 26870913
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Meteorology/Physical oceanography/Hydrology; Environmental dynamic analysis
• Research Institution: Central Research Institute of Electric Power Industry
• Principal Investigator: Misumi Kazuhiro 一般財団法人電力中央研究所, 環境科学研究所, 主任研究員 (10462889)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 鉄 / 栄養塩 / コロイド / 海洋物質循環

Outline of Final Research Achievements

Time evolution of particle size spectrum was examined using a numerical model to incorporate effect of colloidal particles on dissolved iron scavenging in the seawater. Colloidal particles coagulated to particles having diameters exceeding 1 micro meters. As colloidal particles have high collision rates with particles having diameters around 1 mirco meter, colloidal particles could not dominate even in surface waters where colloidal particles are considered to be generated by biological activities. Consequently, effect of colloidal particles on iron scavenging in seawater was thought to be minor at least after the system reaching to the steady state.

Free Research Field

海洋物質循環