Leaf-level dynamic model (Leppä et al., 2022) driven by environmental conditions to predict oxygen and carbon isotopic composition of two hierarchical needle carbohydrate pools: (i) needle sugars and (ii) water-soluble carbohydrates, which in addition to needle sugars contain an invariant compound, pinitol.

For example of model run corresponding to Leppä et al. (2022) see demo.ipynb

Note data use permisions of model forcing data in data/forcing_readme.txt

Leppä, K., Tang, Y., Ogeé, J., Launiainen, S., Kahmen, A., Kolari, P., Sahlstedt, E., Saurer, M., Schiestl-Aalto, P., Rinne-Garmston, K.T. 2022. Explicitly accounting for needle sugar pool size crucial for predicting intra-seasonal dynamics of needle carbohydrates δ18O and δ13C. New Phytologist 236: 2044–2060. https://doi.org/10.1111/nph.18227