Geochemical cycling induced by lightning to ocean surface

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K12181
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Environmental dynamic analysis
• Research Institution: Hokkaido University
• Principal Investigator: Kameyama Sohiko 北海道大学, 地球環境科学研究院, 准教授 (70510543)
• Co-Investigator(Renkei-kenkyūsha): TANIMOTO Hiroshi 独立行政法人国立環境研究所, 地球環境研究センター, 室長 (30342736) ; OGAWA Hiroshi 東京大学, 大気海洋研究所, 准教授 (50260518) ; TSUNOGAI Urumu 名古屋大学, 環境学研究科, 教授 (50313367) ; YAMASHITA Youhei 北海道大学, 地球環境科学研究院, 准教授 (50432224)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: 窒素循環 / 雷放電 / 炭素循環 / 溶存有機物 / 栄養塩

Outline of Final Research Achievements

In this study, we investigate possibilities that lightning to ocean surface induces geochemical cycles. Pulse discharge was used to simulate natural lightning. Seawater, river water and pure water were discharged under pure air or argon atmosphere. We found significant production of nitrogen oxides such as nitrate, nitrite and nitrous oxide. Both production and consumption were occurred for dissolved organic matters.

Free Research Field

化学海洋学