Code and results for Kahiluoto et al. (2024), Redistribution of nitrogen to feed the people on a safer planet, PNAS Nexus

Code and final results of N distribution analysis
to compute national/sub-national nitrogen response curves
from the GGCMI Phase 2 emulators
(Franke et al. 2020, doi: 10.5194/gmd-13-3995-2020)
and to compute optimized N distribution patterns.

written by Christoph Müller, PIK
Licensed under GNU Affero General Public License (AGPLv3)
see https://www.gnu.org/licenses/agpl-3.0.html

Contents:

1) compute_national_nitrogen_response_curves_all2.R

R-script to optimize the N distribution for different models (or the ensemble), optimization targets and crops. 

2) job description files for submitting data to PIK cluster

All *.jcf files can be used to submit the optimization jobs to the PIK cluster via the SLURM system (sbatch *.jcf)

3) results

The file 220324_all_scenarios.xlsx contains the main results for the GGCMI ensemble. It was combined by hand from the original csv files outputted by the R script.
The other *.xlsx files contain the results for individual GGCMs (name given in file name) for the sensitivity analysis.