A double peak in the seasonality of California's photosynthesis as observed from space

Turner, Alexander J.; Köhler, Philipp; Magney, Troy S.; Frankenberg, Christian; Fung, Inez; Cohen, Ronald C.

doi:https://doi.org/10.5194/bg-17-405-2020

Articles | Volume 17, issue 2

https://doi.org/10.5194/bg-17-405-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/bg-17-405-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 17, issue 2

Research article

|

29 Jan 2020

Research article |

| 29 Jan 2020

A double peak in the seasonality of California's photosynthesis as observed from space

Alexander J. Turner, Philipp Köhler, Troy S. Magney, Christian Frankenberg, Inez Fung, and Ronald C. Cohen

Supplement

https://doi.org/10.5194/bg-17-405-2020-supplement

Data sets

Downscaled 500-m TROPOMI SIF over California Alexander J. Turner, Philipp Koehler, Troy S. Magney, Christian Frankenberg, Inez Fung, and Ronald C. Cohen https://doi.org/10.22002/d1.1327

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Short summary

We present the highest resolution solar-induced chlorophyll fluorescence (SIF) dataset from satellite measurements, providing previously unobservable phenomena related to plant photosynthesis. We find a strong correspondence between TROPOMI SIF and AmeriFlux GPP. We then observe a double peak in the seasonality of California's photosynthesis, not seen by traditional vegetation indices (e.g., MODIS). This is further corroborated by EOF/PC analysis.