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Estimation of photosynthetic activity using solar induced chlorophyll fluorescence in a larch forest: Linkage of modeling and observations

Research Project

Project/Area Number 21K17873
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 63010:Environmental dynamic analysis-related
Research InstitutionNational Institute for Environmental Studies (2022-2023)
Hokkaido University (2021)

Principal Investigator

Morozumi Tomoki  国立研究開発法人国立環境研究所, 地球システム領域, 特別研究員 (40866638)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2023: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Keywordsリモートセンシング / 放射伝達モデル / 植物生理生態 / クロロフィル蛍光 / 炭素循環 / フラウンホーファー線深度法 / 林冠構造 / 観測幾何
Outline of Research at the Start

気候変動の将来予測のために生態系CO2吸収量の観測精度向上が鍵である。そこで陸上植物の光合成による生態系CO2吸収量(総一次生産量)を求めるため、高分解能分光放射計を用いて太陽光誘起クロロフィル蛍光(SIF)リモートセンシングを行う。この際に3次元放射伝達モデルを用いてSIFの林冠幾何・分光特性に起因する林冠構造依存性を解析することで、モデル・観測を融合させたより頑強な光合成推定を目指す。本研究ではユーラシア東部の重要な生態系タイプであり今後変動が注目されるカラマツ林(富士北麓)の観測タワーを利用し、SIFの変動要因と林冠構造依存性を明らかにし生態系CO2吸収量の推定精度を向上させる。

Outline of Final Research Achievements

I conducted studies about the remote detection of photosynthetic activity in the forest with spectroscopy observation and canopy 3-D radiative transfer model, based on spatial structure and physiological processes of the forest. Solar-induced chlorophyll fluorescence (SIF) was retrieved from visible near-infrared spectral data at a larch forest tower. SIF reached 1.0 mW m-2 nm-1 sr-1 at noon and correlated to CO2 flux. The model was built using leaf measurement and tree census data, to assess the multi-angle responses of SIF. The fluorescence yield, calculated from SIF, responded to photosynthetic down-regulation under the dry condition with a high vapor pressure deficit.

Academic Significance and Societal Importance of the Research Achievements

森林の二酸化炭素吸収を考える際に、地上観測による正確な評価に加えて、離れた地点について調べるリモートセンシングによる広域評価は欠かせない。本研究では太陽光誘起クロロフィル蛍光という分光シグナルに着目し、その研究例がほどんどない主要樹種であるカラマツ林において変動要因を放射伝達のプロセスに基づき明らかにすることで、より高度な光学衛星データ解析・検証や全球物質循環モデルの進展に寄与する。北半球や国内の寒冷地に広く分布するカラマツ林の炭素吸収機能の検出技術の発展は気候変動の要因と影響解明において重要である。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (11 results)

All 2024 2023 2022 2021 Other

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (9 results) (of which Int'l Joint Research: 5 results) Remarks (1 results)

  • [Journal Article] Row orientation influences the diurnal cycle of solar-induced chlorophyll fluorescence emission from wheat canopy, as demonstrated by radiative transfer modeling2023

    • Author(s)
      Morozumi Tomoki、Kato Tomomichi、Kobayashi Hideki、Sakai Yuma、Tsujimoto Katsuto、Nakashima Naohisa、Buareal Kanokrat、Lan Wu、Ninomiya Hideki
    • Journal Title

      Agricultural and Forest Meteorology

      Volume: 339 Pages: 109576-109576

    • DOI

      10.1016/j.agrformet.2023.109576

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 森林・農地における太陽光誘起クロロフィル蛍光(SIF)観測とモデリングの進展2024

    • Author(s)
      両角友喜, 野田響, 小林秀樹, 加藤知道
    • Organizer
      日本農業気象学会2024 年全国大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Detection of midday depression with canopy-level solar-induced chlorophyll fluorescence and gross primary productivity: impact of heat extreme events in a deciduous needle-leaved forest2023

    • Author(s)
      Tomoki Morozumi, Hibiki Noda, Tomomichi Kato, Hideki Kobayashi, Yuma Sakai, Yoshiyuki Takahashi
    • Organizer
      AGU23
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] カラマツ林の総一次生産量推定における林冠上端の太陽光誘起クロロフィル蛍光SIFの構造的および植物生理学的効果2023

    • Author(s)
      両角 友喜, 野田 響, 加藤 知道, 小林 秀樹, 酒井 佑槙, 高橋 善幸
    • Organizer
      日本地球惑星科学連合大会2023 (JpGU)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Full-spectral observation of leaf-level chlorophyll fluorescence to bridge the gap between tower and satellite observed solar-induced chlorophyll fluorescence (SIF) in a temperate deciduous forest and a subtropical evergreen forest in Japan2023

    • Author(s)
      Morozumi T., Noda H., Kato T., Kobayashi H., Takahashi Y., Matsumoto K.
    • Organizer
      The iLEAPS OzFlux Joint Conference 2023
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 中部日本富士北麓落葉針葉樹林冠上におけるサブナノ分光計測を用いた太陽光誘起クロロフィル蛍光の評価2022

    • Author(s)
      両角友喜, 加藤知道, 野田響, 高橋善幸
    • Organizer
      日本地球惑星科学連合大会2022年大会(JpGU2022)
    • Related Report
      2022 Research-status Report
  • [Presentation] A modeling study for forest structure effect on Solar-Induced chlorophyll Fluorescence in a relatively sparse canopy of the temperate larch forest in Mt. Fuji, Japan2022

    • Author(s)
      Morozumi T., Noda H., Kato T., Kobayashi H., Sakai Y., Takahashi Y.
    • Organizer
      AGU Fall Meeting 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Red and far-red solar-induced chlorophyll fluorescence responding to air temperature, humidity, and leaf growth in a Japanese larch forest site on a spring-summer transition2022

    • Author(s)
      Morozumi T., Noda H., Takahashi Y., Kato T.
    • Organizer
      AsiaFlux 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 富士カラマツ林における林冠太陽光誘起クロロフィル蛍光の算出手法と雲量による影響2022

    • Author(s)
      両角友喜, 加藤知道, 野田響, 高橋善幸
    • Organizer
      第69回日本生態学会
    • Related Report
      2021 Research-status Report
  • [Presentation] Ground based observation of solar induced chlorophyll fluorescence using a fine resolution spectrometer across multiple sites in cool temperate to sub-tropical ecosystems, Japan2021

    • Author(s)
      Morozumi T., Kato T., Nakashima N., Kanokrat B., Tanatarakeree K., Kobayashi H., Sakai Y., Tsujimoto K., Noda H., Takahashi Y., Takagi K., Hirano T., Ueyama M., Ono K., Matsumoto K., Akitsu T.K., Nasahara K.N., Murayama S., Muraoka H.
    • Organizer
      iLEAPS-Japan 研究集会2021
    • Related Report
      2021 Research-status Report
  • [Remarks] 地球環境研究センターニュース 観測現場発 季節のたより[27] 黄緑色のカラマツ林

    • URL

      https://cger.nies.go.jp/cgernews/202401/398006.html

    • Related Report
      2023 Annual Research Report

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Published: 2021-04-28   Modified: 2025-01-30  

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