Continuous observation data of solar-induced chlorophyll fluorescence in a larch forest in Fuji-Hokuroku site

Tomoki Morozumi (orcid.org/0000-0002-1110-6068)
Earth System Division, National Institute for Environmental Studies (NIES)
Researcher Info (URL):https://researchmap.jp/mtsince2018

2026/05/12

2022/07/23 - 2022/08/12

NIES
Email: cgerdb_admin(at)nies.go.jp

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English

Solar-Induced chlorophyll Fluorescence (SIF-O2A: 760nm), Fluorescence Correction Vegetation Index(FCVI), Vegetation Fraction Near-Infrared Reflectance (NIRv), Photochemical Reflectance Index (PRI), Canopy Fluorescence Emission Efficiency (eF)

30 minutes

0.023 mW m-2 nm-1 sr-1 in dark stability check

2021/03/16 Start (ongoing)

Location: 35.443528°N 138.764722°E

Elevation: 1050-1150 m; Sampling height: 32 m above ground; Altitude: 1180 m ;

Solar-induced chlorophyll fluorescence (SIF) is detected by the improved Fraunhofer Line Discrimination (iFLD) method at a height of 32 m on the tower over a larch plantation forest in the foothills of Mt Fuji. Fine-spectral radiance is measured using scientific grating spectrometers (wavelength range of 650-800 nm, with an interval of 0.15 nm and a spectral resolution of 0.3 nm) connected to optical fibers, a splitter, and mechanical shutters. Sensor field of view is 25 degrees. Spectral radiance is calibrated from a digital number of the spectrometer in the field using a factory-corrected standard Halogen lamp. Field calibration was conducted one to two times per year. The sky and vegetation signals are switched at a sequence of 10-20 seconds. The observation cycles are 5-minute intervals from 03:00 to 21:00 JST (UTC+9).

SIF radiance at 760 nm wavelength (mW m-2 nm-1 sr-1), corresponding to the atmospheric oxygen absorption band (O2A), is retrieved by the iFLD method applied to the 750-780 nm range. Sub-parameters, calculated from reflectance spectra, include the Fluorescence Correction Vegetation Index (FCVI), the Vegetation Fraction Near-infrared Reflectance (NIRv), the Photochemical Reflectance Index (PRI), and the canopy fluorescence emission efficiency (eF: εF x10^6 nm-1). The half-hourly (30 minutes) product was calculated from the average of the 5-minute samples after quality checking of the radiance stability.

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[2026/05/12]

Tomoki Morozumi (orcid.org/0000-0002-1110-6068)
Earth System Division, National Institute for Environmental Studies (NIES)

Hibiki Noda
Earth System Division, National Institute for Environmental Studies (NIES)

Tomomichi Kato
Faculty of Agriculture, Hokkaido University

Hideki Kobayashi
Institute of Arctic Climate and Environment Research, Japan Agency for Marine-Earth Science and Technology

Yoshiyuki Takahashi
Earth System Division, National Institute for Environmental Studies (NIES)

This research was supported by NIES-SYKE (the Finnish Environmental Institute) collaborative research activities.

Morozumi, T., Kato, T., Kobayashi, H., Noda, H.M. Matsunaga, T. (2024), Ground-based spectral measurements of solar-induced chlorophyll fluorescence for validation of GOSAT-GW TANSO-3, Special Issue for GOSAT-GW TANSO-3: Explanations, Journal of The Remote Sensing Society of Japan, 44, 2, 170-176, doi:10.11440/rssj.2024.005.

Morozumi et al., (manuscript in preparation) Detection of heat and drought effects on the photosynthetic production using solar-induced chlorophyll fluorescence and a photochemical reflectance index in a cool-temperate larch forest in Japan.

Grants-in-Aid for Scientific Research (KAKENHI), JP21K17873
Grants-in-Aid for Scientific Research (KAKENHI), JP24H01525

CC BY 4.0（Creative Commons Attribution 4.0 International）

Morozumi et al. (2026), Continuous observation data of solar-induced chlorophyll fluorescence in a larch forest in Fuji-Hokuroku site, ver.x.x^*1, NIES, DOI:10.17595/20260512.001. (Reference date^*2: YYYY/MM/DD)
^*1 The version number is indicated in the name of each data file.
^*2 As the reference date, please indicate the date you downloaded the files.