- Default HYSPLIT output in mass/volume units
- Many measurements are in volume mixing ratios
(volume pollutant / volume air)
- To convert between units requires the pollutant's molecular weight
- A shortcut is to divide the output concentration by the air density (ichem=6)
- The resulting output is then mass mixing ratio (mass pollutant / mass air)
- Multiply by the ratio of the molecular weight of air (29) to the pollutant
- The result is the volume mixing ratio
If continuing from the previous example,
delete LAGSET.CFG from the working directory.
conc_case_control.txt | load control file |
conc_case_setup.txt | load setup file |
ichem=6 | namelist mass to volume conversion |
fL | Border labels mass units |
/L | Border labels volume |
8.3E+10 | Concentration multiplier |
2000+1000+500+200+100 | User set contours |
data_orig.txt | aircraft data as mixing ratio |
|