Articles | Volume 19, issue 17
https://doi.org/10.5194/bg-19-4067-2022
https://doi.org/10.5194/bg-19-4067-2022
Research article
 | 
01 Sep 2022
Research article |  | 01 Sep 2022

Intercomparison of methods to estimate gross primary production based on CO2 and COS flux measurements

Kukka-Maaria Kohonen, Roderick Dewar, Gianluca Tramontana, Aleksanteri Mauranen, Pasi Kolari, Linda M. J. Kooijmans, Dario Papale, Timo Vesala, and Ivan Mammarella

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Latest update: 13 Jul 2024
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Short summary
Four different methods for quantifying photosynthesis (GPP) at ecosystem scale were tested, of which two are based on carbon dioxide (CO2) and two on carbonyl sulfide (COS) flux measurements. CO2-based methods are traditional partitioning, and a new method uses machine learning. We introduce a novel method for calculating GPP from COS fluxes, with potentially better applicability than the former methods. Both COS-based methods gave on average higher GPP estimates than the CO2-based estimates.
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