EGU21-3641, updated on 08 Feb 2022
EGU General Assembly 2021
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Modelling carbon fluxes from New Zealand’s pastoral agriculture

Elizabeth Keller1,2, Scott Graham3, John Hunt3, Aaron Wall4, Louis Schipper4, Andrew McMillan5, Dora Hidy6, Zoltán Barcza7, Beata Bukosa8, and Sara Mikaloff-Fletcher8
Elizabeth Keller et al.
  • 1GNS Science, Lower Hutt, New Zealand (
  • 2Antarctic Research Centre, Victoria University of Wellington, Wellington, New Zealand
  • 3Manaaki Whenua Landcare Research, Lincoln, New Zealand
  • 4University of Waikato, Hamilton, New Zealand
  • 5Environmental Analytics, Wellington, New Zealand
  • 6Excellence Center, Faculty of Science, Eötvös Loránd University, Martonvásár, Hungary
  • 7Eötvös Loránd University, Budapest, Hungary
  • 8NIWA, Wellington, New Zealand

Grasslands cover half of New Zealand’s land area, with much of it consisting of pastoral agriculture systems of varying intensity. Carbon fluxes from grazed pasture are thus a crucial part of the national carbon budget. We have used Biome-BGCMuSo v6 to model national CO2 fluxes from grasslands, calibrated with eddy covariance measurements at grazed farms at various sites around the country. We discuss the challenges of scaling up site measurements to the national level and modelling the diversity of New Zealand's pastoral sector. Model outputs will subsequently be used as a prior estimate of CO2 fluxes in an atmospheric inversion to obtain a total carbon budget for New Zealand as part of the CarbonWatch-NZ project.

How to cite: Keller, E., Graham, S., Hunt, J., Wall, A., Schipper, L., McMillan, A., Hidy, D., Barcza, Z., Bukosa, B., and Mikaloff-Fletcher, S.: Modelling carbon fluxes from New Zealand’s pastoral agriculture, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-3641,, 2021.


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