GNOC.py - a python implementation of the Global Nitrous Oxide Calculator
What is GNOC.py
This tool is an update of the previous GNOC tool, calculating N2O emissions from cultivated land. Currently only crops used for biofuels are included. The formulae to calculate emissions are from IPCC 2019.
Workflow
The first part of the tool collects all needed input data. Preference is given to official and publically available datasets. For more information, see Needed inputs. All inputs are then rasterized on a common raster (4320x2160 pixel, EPSG:4326).
The next step is to apply the IPCC equations for the different contributions to N2O emissions:
- N inputs (Fertilizer, organic nitrogen, crop residues, atmospheric deposition)
- Leaching
- Organic soils
The last step is to analyse the results. Displaying inputs and emissions on a map allows to analyze regional distribution. Country-wise values are calculated. Statistics on crop trade and production of the EU27 are used to determine the N2O emissions caused by the crops "consumed" in the EU27.