• I am trying to convert Mass Mixing Ratio (MMR) to Volume Mixing Ratio (VMR) and then convert VMR to Dobson Unit (DU). I used this method but I values thats not correct. For O3, the formula is:
  • VMR = 28.9644 / 47.9982 * 1e9 * MMR
  • VMR to DU: O3 (in DU) = VMR * 0.001 * 0.78914
  • https://confluence.ecmwf.int/pages/viewpage.action?pageId=153391710

Pressure(hPa): 400 MMR: 9.59E-08 KgKg-1

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