Dear all,
I just get the data from ESGF for 4MIPs Nitrogen deposition dataset (in below URL) to use the forcing in GFDL CM2.1.
https://esgf-node.llnl.gov/search/input4mips/
This data gives approximation of NOy and NHx depostion fluxes by using a chemical model.
Those scales are kg/m^2/sec. But, current model uses mole/m^2/sec.
So, I need transformation from kg to mole for NOy and NHx.
But, It seems impossible due to unfixed molecular number depending on y and x.
Although, is there any universal assumption to describe commonly known masses of NOy and NHx?
H.-G. Lim
You can only calculate the average molar mass of NOy and NHx, but you need to know which components you have in the mixture (y means oxidation products such as nitric acid must be included), and their mass fractions.
As most N oxides (except N2O) oxidise to NO2 in air, I would guess that they are using the molecular mass of NO2 in the calculations, and similarly NH3 for NHx, but I emphasize that this is a guess.
Thank you all,
I must find the fractions of the NOy and NHx.
I will ask this issue to the dataset provider.
H.-G. Lim
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