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Which factors are impacting SIF signal and GPP? 


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Solar-induced chlorophyll fluorescence (SIF) is impacted by several factors, including plant status (leaf chlorophyll content and leaf area index) and meteorological parameters (incoming shortwave radiation, air temperature, and atmospheric vapor pressure) . SIF is being widely investigated in relation to vegetation gross primary productivity (GPP) across different scales and plant functional types . The linear relationship between SIF and GPP was found to be stronger in the SynSIF dataset compared to other SIF datasets, with improvements in R2 values across different vegetation types . Additionally, SynSIF showed spatially complementary characteristics with another SIF dataset, GOSIF, in Oceania and Europe, particularly in shrublands and grasslands . These findings provide valuable insights for the simulation of SIF in different biomes and estimating the terrestrial carbon cycle .

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The provided paper does not mention anything about SIF signal or GPP.
The provided paper does not mention any factors impacting the SIF signal or GPP.
The provided paper does not mention anything about SIF signal or GPP.

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