NZ monthly enteric methane emissions (2017-2022)

Maps produced for MethaneSAT. Each dataset is an estimate of methane produced by enteric fermentation across different classes of livestock at approximately 1.5 km resolution (pixel length); this is not an equal area projection. Datasets are 12-band raster data where each band is monthly emissions (1=January). "CCTO", "CCPO" and "CCAV" refer to values of livestock carrying capacity determined by the NZLRI.

The data underlying these maps are livestock distribution maps at sub-farm scale. Methane emissions are estimates based on Tier 2 inventory accounting methods. Distributions of livestock are determined through a process that combines Agribase farm counts, pasture productivity and the agricultural production surveys and census.

A slightly more detailed methodology document is included as an attachment.

Note that the output is considerably downsampled from sub-farm scale, using a weighted sum algorithm. This is both by necessity (to sufficiently confidentialise Agribase information), and by design (to match the resolution used in inverse modelling).

Units are kT CH₄ (kilotonnes of methane), monthly total per pixel.

Please acknowledge the funding from the NZ Space Agency through the MethaneSAT Project (C01X2023) which ultimately made this possible.

Data and Resources

Additional Info

Field Value
Publisher Manaaki Whenua – Landcare Research
Publication Year 2022
Authors
  1. Law, Richard
Start Date 2017
End Date 2022
Version 1.1