What question did this study set out to answer?

To evaluate the strength and universality of the relationship between fine-resolution satellite solar-induced chlorophyll fluorescence and ecosystem gross primary productivity across diverse biomes.

May 7, 2018Global Change BiologyOpen Access

Solar‐induced chlorophyll fluorescence is strongly correlated with terrestrial photosynthesis for a wide variety of biomes: First global analysis based on OCO‐2 and flux tower observations

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Authors

XLXing LiSun Yat-sen University JXJingfeng XiaoUniversity of New Hampshire BHBinbin HeKunming University of Science and Technology

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Implication

Global observational study demonstrates strong correlations between satellite fluorescence and tower photosynthesis across major biomes, indicating a universal carbon-tracking proxy.

Key Points

To evaluate the strength and universality of the relationship between fine-resolution satellite solar-induced chlorophyll fluorescence and ecosystem gross primary productivity across diverse biomes.
Analyzed fine-resolution (1.3 km × 2.25 km) Orbiting Carbon Observatory-2 (OCO-2) solar-induced chlorophyll fluorescence (SIF) against tower gross primary productivity (GPP).
Evaluated data from N=64 flux tower sites globally across eight major biomes at midday and daily timescales.
Compared SIF performance at 757 nm against satellite vegetation indices and a light use efficiency model.
Daily SIF at 757 nm strongly correlated with tower GPP overall (R² = 0.72, p < 0.0001) and across most biomes (R² = 0.57–0.79, p < 0.0001), but showed a weak relationship in evergreen broadleaf forests (R² = 0.16, p < 0.05).
Linear regression slopes were largely consistent across biomes, though C4 grasslands and croplands exhibited higher slopes than C3 ecosystems.
OCO-2 SIF predicted GPP with higher accuracy than satellite-derived vegetation indices and standard light use efficiency models.

Cite This Study

Li et al. (2018) studied this question.

synapsesocial.com/papers/69ffbb32581c6e761e7788bb https://doi.org/10.1111/gcb.14297

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Implication

Global observational study demonstrates strong correlations between satellite fluorescence and tower photosynthesis across major biomes, indicating a universal carbon-tracking proxy.

Solar‐induced chlorophyll fluorescence is strongly correlated with terrestrial photosynthesis for a wide variety of biomes: First global analysis based on OCO‐2 and flux tower observations

Discussion

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Implication

Key Points

Cite This Study

Solar‐induced chlorophyll fluorescence is strongly correlated with terrestrial photosynthesis for a wide variety of biomes: First global analysis based on OCO‐2 and flux tower observations

Discussion

Member takes

Implication

Key Points

Cite This Study

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