Observation of methane budget and establish of the regional database for Arctic warming studies

2016 Fiscal Year Final Research Report

• Project/Area Number: 26281012
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Environmental dynamic analysis
• Research Institution: Osaka Prefecture University
• Principal Investigator: Harazono Yoshinobu 大阪府立大学, 生命環境科学研究科(系), 客員研究員 (90137240)
• Co-Investigator(Kenkyū-buntansha): 岩田 拓記 信州大学, 理学部, 助教 (10466659) ; 植山 雅仁 大阪府立大学, 生命環境科学研究科(系), 准教授 (60508373)
• Co-Investigator(Renkei-kenkyūsha): ITO Akihiko 国立環境研究所, 地球環境研究センター, 主任研究員 (70344273) ; ICHII Kazuhito 千葉大学, 環境リモートセンシング研究センター, 教授 (50345865)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: メタン収支 / 永久凍土 / データベース / 広域評価 / クロトウヒ林 / 炭素収支 / 渦相関法 / チャンバフラックス

Outline of Final Research Achievements

Arctic warming has been affecting mid-latitude climate. Arctic warming progresses the degradation of tundra and permafrost, that increase methane (CH4) emission, resulting in accelerating the warming. In this study, we observed CH4 exchange at poorly drained black spruce forest in Alaska applying micrometeology techniques and chambers, to reveal the processes of CH4 exchange.
Obtained data have been compiled as long-term high quality dataset and opened for scientific users on global change syudies. We also archived referent data from foreign researchers for a global scale database. Based on the data, the parameters of the carbon balance model were improved, and providing better CH4 budget evaluation globaly. Observed results showed that understory of black spruce forest showed large CH4 absorption during drought, while daily CH4 budget changed between sink and source according to soil water content. Results may contribute to improving the accuracy of climate model prediction.

Free Research Field

環境生態学