citations to add

[teixeirak]

• [x] https://onlinelibrary.wiley.com/doi/abs/10.1111/gcb.15892
• [x] https://doi.org/10.1016/j.agrformet.2021.108699

[NidhiVinod]

@teixeirak, I cannot access the second citation here because it requires me to sign into Smithsonian. Wondering what the name of the article is?

[teixeirak]

Sorry for the SI internal link. Fixed!