Input data set: N-Fertilizer (ISIMIP3a)

We provide the fertilization rate per our five canonical crop types, i.e. for both annual and perennial C3 and C4 crops, as well as for nitrogen fixing crops. The variables’ names are fertl_c3ann, fertl_c3per, fertl_c4ann, fertl_c4per and fert_c3nfx. The data are provided on an annual times step on the land surface of a global 0.5° × 0.5° grid. The units are kilograms per year and per hectare.

Data is available for the historical time period (1850-2021).

We provide fertilization rates for the historical period 1850-2021. Observation data is provided in the histsoc folder. Temporally constant fertilization rates are provided in the 1901soc and 2015soc folder.

The fertilization rates are based on HYDE 3.2 (Klein Goldewijk, 2016), but then harmonized by Hurtt et al (LUH2 v2h data set, see [Hurtt, Chini, Sahajpal, Frolking, & et al, In prep.], see also https://luh.umd.edu/).

For ISIMIP participants, these files are available for download on the DKRZ server:
/work/bb0820/ISIMIP/ISIMIP3a/InputData/socioeconomic/n-fertilizer/

For external users, these data can be downloaded from the ISIMIP Repository using the link below.