Estimating CO2 fertilization effects using the eddy covariance big-data over Asia region

• Project/Area Number: 16K12588
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Environmental dynamic analysis
• Research Institution: Osaka Prefecture University
• Principal Investigator: Ueyama Masahito 大阪府立大学, 生命環境科学研究科, 准教授 (60508373)
• Research Collaborator: 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
• Project Period (FY): 2016-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000); Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2016: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: CO2施肥効果 / CO2濃度上昇 / 光合成 / 渦相関法 / AsiaFlux / 植物整理 / 生態系モデル / 群落光合成 / 蒸発散速度 / 植物生理特性 / モデル / 気孔コンダクタンス / FLUXNET / CO2フラックス / 気候変動

Outline of Final Research Achievements

The CO2 fertilization effect was estimated based on a synthesis between tower flux measurement data and the canopy photosynthesis model. The synthesis approach directly estimated the ecophysiological parameters those had high sensitivity to the CO2 fertilization effect. I prepare the eddy covariance data from 60 site across the Asian region using AsiaFlux database. Estimated increase in canopy photosynthesis is 0.28 % ppm-1 at the site scale, and 3.1 PgC yr-1 for the continental scale from 2000 to 2014.

Research Products

• [Journal Article] Leaf- and ecosystem-scale photosynthetic parameters for the overstory and understory of boreal forests in interior Alaska (2018)
  • Author(s): Masahito Ueyama, Narumi Tahara, Hirohiko Nagano, Naoki Makita, Hiroki Iwata, Yoshinobu Harazono
  • Journal Title: Journal of Agricultural Meteorology Volume: 74 Issue: 2 Pages: 79-86
  • DOI: 10.2480/agrmet.D-17-00031
  • NAID: 130006684513
  • ISSN: 0021-8588, 1881-0136
  • Peer Reviewed / Open Access
• [Presentation] 内陸アラスカにおける森林火災からの植生回復と炭素収支の長期観測 (2018)
  • Author(s): 植山雅仁・岩田拓記・永野博彦・田原成美・原薗芳信
  • Organizer: 農業気象学会全国大会2018
• [Presentation] Successional change in photosynthetic capacities after wildfires across the North American boreal forests. (2016)
  • Author(s): Tahara, N., Ueyama, M.
  • Organizer: International Russian-Japanese conference of young polar scientists
  • Place of Presentation: Moscow Russian Federation
  • Year and Date: 2016-10-11
  • Int'l Joint Research
• [Presentation] Synthesis of top-down and bottom-up estimations of terrestrial CO2 budget in Asia (2016)
  • Author(s): Ichii., K., Kondo, M., Prabir, P., Saeki, T., Maki, T., Nakamura, T., Niwa, Y., Ueyama, M., Hayashi, M., Pingchun, Yanagi, Y., Saigusa, N., and Asia-MIP participants.
  • Organizer: Japan Geoscience Union Meeting 2016
  • Place of Presentation: Yokohama
  • Year and Date: 2016-05-22
• [Remarks] モデル研究
  • URL: http://atmenv.envi.osakafu-u.ac.jp/staff/ueyama/research_model/