wiki:ESM2025-N-cycle/Intermediate_conclusions/preindustrial_runs

Version 1 (modified by klaurent, 3 months ago) (diff)

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All about preindustrial runs

Initial State

Which files are used? and where do they come from?

Restart

  • Overrule yes
  • taken from restart.remake, year 1890 from remake RST (it's a simulation which has run for 40 years and which surface concentration seems stable around 317.6 ppb).
  • rescaling made with NCO commands to rescale from 317.6 to 337 ppb. This value is the one found with the box model (emi=7.88(land)+4(ocean)+0.14(ant)+0.497(bbg) TgN/yr; and lifetime = 130.02 year; factor=5.625/44)

Continent

  • From Orchidee v3 model.
  • Named fN2O
  • Output of IncaFlx? on obelix.

Ocean

  • From Nemo/Pisces? v3.6
  • spin-up named spinup.piscesOFFLINE
  • used year 1834, while run starts in 1660
  • Output of IncaFlx? on obelix.

Oxidants

  • reconstructed from CMIP6 simulation and script of O. Boucher

Comparison to CNRM file (named N2Oflx_OClim_1850_2014.nc) Only 12 values each (one per month)

N2Oflx (TgN2O/yr) CNRM IPSL
jan 5.91 (?) 5.94
ave 5.90 6.28

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