Elevated CO2 levels promote both carbon and nitrogen cycling in global forests

Nature Climate Change, Published online: 02 April 2024; doi:10.1038/s41558-024-01973-9

Using a global meta-analysis approach, the authors show that elevated CO2 alone can increase primary productivity and leaf C/N ratio and stimulate nitrogen fixation and nitrogen use efficiency. They project increasing carbon sink and decreasing reactive nitrogen loss under climate change.