Articles | Volume 13, issue 11
Geosci. Model Dev., 13, 5401–5423, 2020
https://doi.org/10.5194/gmd-13-5401-2020
Geosci. Model Dev., 13, 5401–5423, 2020
https://doi.org/10.5194/gmd-13-5401-2020

Model description paper 10 Nov 2020

Model description paper | 10 Nov 2020

Modeling the impacts of diffuse light fraction on photosynthesis in ORCHIDEE (v5453) land surface model

Yuan Zhang et al.

Data sets

La Thuile synthesis dataset Fluxdata https://fluxnet.fluxdata.org/data/la-thuile-dataset/

Model code and software

ORCHIDEE_DFv1.0_site Yuan Zhang https://doi.org/10.14768/20200407003.1

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Short summary
We improved the ORCHIDEE LSM by distinguishing diffuse and direct light in canopy and evaluated the new model with observations from 159 sites. Compared with the old model, the new model has better sunny GPP and reproduced the diffuse light fertilization effect observed at flux sites. Our simulations also indicate different mechanisms causing the observed GPP enhancement under cloudy conditions at different times. The new model has the potential to study large-scale impacts of aerosol changes.