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6th Aug.

Luis Guanter, Yongguang Zhang, Martin Jung, etc. Global and time-resolved monitoring of crop photosynthesis with chlorophyll fluorescence. PNAS. 111(14):1327-1333.

This paper is about how to obtain global SiF value from satellite and convolve it into GPP model to improve estimates of global GPP.

For the first time, I understand how to combine SiF data into GPP model. It's an empirical model, I think. Modified according to the LUE GPP model. However, I really doubt the sound linear relationship between SiF and GPP. Because I believe it's hard to imagine that the ration of light use efficiency and "fluorescence use efficiency" is constant diurnally and seasonally. Yet, global scale pattern may be quite different with field scale. It's too complicated.

Anyway, I find a more interesting way to analyses data and study the relationship between SiF and many other variables. I tried it and got several very nice figures.


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