Area-ratio Fraunhofer line depth (aFLD) method approach to estimate solar-induced chlorophyll fluorescence in low spectral resolution spectra in a cool-temperate deciduous broadleaf forest

Nakashima, Naohisa; Kato, Tomomichi; Morozumi, Tatsuya; Tsujimoto, Kazufumi; Akitsu, Tomoko; Nasahara, Kenlo Nishida; Murayama, Shohei; Muraoka, Hiroyuki; Noda, Hibiki

doi:10.1007/s10265-021-01322-3

Cited by 7 publications

(2 citation statements)

References 63 publications

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“…QE Pro has a spectral range of 645-805 nm with a spectral resolution of ~0.3 nm and peak SNR of greater than 1000. QE Pro is widely used for ground or tower-based SIF measurements [34][35][36][37][38] because of its high-performance specifications.…”

Section: Methodsmentioning

confidence: 99%

Prospects for Solar-Induced Chlorophyll Fluorescence Remote Sensing from the SIFIS Payload Onboard the TECIS-1 Satellite

Liu

Chen

et al. 2022

J Remote Sens

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The importance of solar-induced chlorophyll fluorescence (SIF) to monitoring vegetation photosynthesis has attracted much attention from the ecological and remote sensing research communities. Space-borne SIF products have been obtained owing to the rapid development of atmospheric satellites in recent years. The SIF Imaging Spectrometer (SIFIS) is a payload onboard the upcoming Terrestrial Ecosystem Carbon Inventory Satellite (TECIS-1) that is specifically designed for SIF monitoring. We conducted an in situ experiment to evaluate the performance of SIFIS on spectral measurement and SIF retrieval through comparison to the commercial spectrometer QE Pro. Disregarding the spatiotemporal mismatch between the collected measurements of the two spectrometers, the radiance spectra obtained synchronously by SIFIS and QE Pro showed a high level of consistency. The SIF retrieval, normalized difference vegetation index (NDVI), and near-infrared radiance of vegetation (NIRvR) results for a push-broom image shows consistent spatial distributions over both vegetated and nonvegetated surfaces. A quantitative comparison was conducted by strictly filtering matching pixels. For the far-red band, a high correlation was obtained between the SIF retrieval performances of SIFIS and QE Pro with R2=0.70 and RMSE=0.30 mW m−2 sr−−1 nm−1. However, a relatively poor correlation was observed for the red band with an R2 value of 0.23 and an RMSE of 0.26 mWm−2sr-−1nm−1. Despite the large uncertainties associated with this experiment, the results indicate that TECIS-1 should offer a reliable SIF monitoring performance after its launch.

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Section: Methodsmentioning

confidence: 99%

Prospects for Solar-Induced Chlorophyll Fluorescence Remote Sensing from the SIFIS Payload Onboard the TECIS-1 Satellite

Liu

Chen

et al. 2022

J Remote Sens

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“…However, it has been suggested that the quantification of SIF requires a high-resolution spectroradiometer with full-width at half maximum (FWHM) < 0.3 nm, and low-resolution spectroradiometers are not useful (Meroni and Colombo 2006). Nakashima et al (2021) propose a new method, termed aFLD, to calculate a reasonable SIF from a spectroradiometer with low spectral resolution. This enables us to extract SIF values from past observation data accumulated in various vegetation sites on a decade scale.…”

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confidence: 99%

Imaging, screening and remote sensing of photosynthetic activity and stress responses

2021

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All lives rely on photosynthesis. It provides energy and carbohydrates not only to photosynthetic organisms themselves but also to heterotrophic organisms through the food web. It is also one of the most important processes in global carbon cycling. Improvement of photosynthesis is a key to solving problems that human society faces. Crop management and breeding of cultivars with higher photosynthetic activities may contribute to increasing crop yields, which are needed to meet rapid population growth. Enhancement of carbon sequestration in terrestrial ecosystems may be one of the effective ways for a low-carbon economy.The spatial scale of photosynthetic measurements varies greatly among target organisms. The gas exchange method (CO 2 or O 2 ) is the most reliable and frequently used. From cellular (or chloroplast) to leaf and individual scales, samples are put into or clamped with an assimilation chamber, and gas exchange is directly determined with an infrared gas analyzer or O 2 electrode. In particular, commercial portable gas exchange measurement systems can be used for leaf photosynthesis determination even in the field. For vegetation scales, the eddy covariance method directly determines CO 2 exchange between the vegetation and atmosphere using an infrared gas analyzer and anemometer installed on a flux tower. However, these methods have some shortcomings.

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Phenology of Photosynthesis in a Deciduous Broadleaf Forest: Implications for the Carbon Cycle in a Changing Environment

Muraoka

2022

River Basin Environment: Evaluation, Management and Conservation

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Area-ratio Fraunhofer line depth (aFLD) method approach to estimate solar-induced chlorophyll fluorescence in low spectral resolution spectra in a cool-temperate deciduous broadleaf forest

Cited by 7 publications

References 63 publications

Prospects for Solar-Induced Chlorophyll Fluorescence Remote Sensing from the SIFIS Payload Onboard the TECIS-1 Satellite

Prospects for Solar-Induced Chlorophyll Fluorescence Remote Sensing from the SIFIS Payload Onboard the TECIS-1 Satellite

Imaging, screening and remote sensing of photosynthetic activity and stress responses

Phenology of Photosynthesis in a Deciduous Broadleaf Forest: Implications for the Carbon Cycle in a Changing Environment

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