Aerosols
https://www.nco.ncep.noaa.gov/pmb/docs/grib2/grib2_doc/grib2_table4-2-0-13.shtml
AEROT
Aerosol Type
See Table 4.205
PMTC
Particulate matter (coarse)
g m-3
PMTF
Particulate matter (fine)
g m-3
LPMTF
Particulate matter (fine)
log10 (g m-3)
LIPMF
Integrated column particulate matter (fine)
log10 (g m-3)