https://www.nco.ncep.noaa.gov/pmb/docs/on388/table2.html EXTNC Aerosol Extinction Coefficient km-1 AOD Aerosol Optical Depth ASFTR Aerosol Asymmetry Factor SSALBD Aerosol Single Scatter Albedo BSCTRS Aerosol Back Scattering km-1sr-1 NOy Total Inorganic and Organic Nitrates ppbV NO Nitrogen Oxide ppbV NO2 Nitrogen Dioxide ppbV N2O5 Nitrogen Pentoxide ppbV HNO3 Nitric Acid ppbV NO3 Nitrogen Trioxide ppbV PNA Peroxynitric Acid ppbV HONO Nitrous Acid ppbV CO Carbon Monoxide ppbV NH3 Ammonia ppbV HCL Hydrogen Chloride ppbV PAR Lumped Single-Bond Carbon Specie ppbV ETHE Ethene ppbV OLE Lumped Double-Bond Carbon Species Less Ethene ppbV TOL Toluene ppbV XYL Xylene ppbV ISOP Isoprene ppbV FORM Formaldehyde ppbV ALD2 Acetaldehyde & Higher Aldehydes ppbV MGLY Methyl Glyoxal ppbV CRES Cresol and Higher Molecular Weight Phenols ppbV PAN Peroxyacyl Nitrate ppbV NTR Lumped Gaseous Organic Nitrate ppbV ROOH Esters ppbV ETHOH Ethanol ppbV METHOH Methanol ppbV H2O2 Hydrogen Peroxide ppbV OH Hydroxyl Radical ppbV HO2 Hydroperoxyl Radical ppbV ASO4 Sulfate (SO4) Particulates 2.5 m Diameter g/m3 ANH4 Ammonia (NH4) Particulates 2.5 m Diameter g/m3 ANO3 Nitrate (NO3) Particulates 2.5 m Diameter g/m3 AORGA Organic Particulates 2.5 m Diameter g/m3 AORGPA Primarily Organic Particulates 2.5 m Diameter g/m3 AORGB Biogenically Originated Particulates 2.5 m Diameter g/m3 AEC Elemental Carbon Particulates 2.5 m Diameter g/m3 A25 Unspecified Anthropogenic Particulates 2.5 m Diameter g/m3 AH2O Water Particulates 2.5 m Diameter g/m3 ANA Sodium Particulates 2.5 m Diameter g/m3 ACL Chloride Particulates 2.5 m Diameter g/m3 ASO4K Sulfate (SO4) Particulates between 2.5 and 10 m Diameter g/m3 ANAK Sodium (NA) Particulates between 2.5 and 10 m Diameter g/m3 ACLK Chloride (CL) Particulates between 2.5 and 10 m Diameter g/m3 ASEAS Sea Salt Originated Particulates between 2.5 and 10 m Diameter g/m3 ASOIL Crustal Material Originated Particulates between 2.5 and 10 m Diameter g/m3 ACORS Particulates between 2.5 and 10 m Diameter g/m3 NUMATKN Number Concentration Particulates between 2.5 and 0.1 m Diameter number/m3 NUMACC Number Concentration Particulates between 2.5 and 2.5 m Diameter number/m3 NUMCOR Number Concentration Particulates between 2.5 and 10 m Diameter number/m3 SRFATKN Surface Area Contributed by Particulates 0.1 m Diameter m2/m3 SRFACC Surface Area Contributed by Particulates between 0.1 and 2.5 m Diameter m2/m3 SO2 Sulfur Dioxide ppbV MSA Methanesulfonic Acid kg/kg TSO4 Total Sulfate Particulates (Fine and Coarse) g/m3 DMS Dimethylsulfide kg/kg DU1 Dust Particulates between 0.2 - 2.0 m Diameter kg/kg DU2 Dust Particulates between 2.0 - 3.6 m Diameter kg/kg DU3 Dust Particulates between 3.6 - 6.0 m Diameter kg/kg DU4 Dust Particulates between 6.0 - 12.0 m Diameter kg/kg DU5 Dust Particulates between 12.0 - 20.0 m Diameter kg/kg SS1 Sea Salt Particulates between 0.2 - 1.0 m Diameter kg/kg SS2 Sea Salt Particulates between 1.0 - 3.0 m Diameter kg/kg SS3 Sea Salt Particulates between 3.0 - 10.0 m Diameter kg/kg SS4 Sea Salt Particulates between 10.0 - 20.0 m Diameter kg/kg OCDRY Hydrophobic Organic Carbon kg/kg OCWET Hydrophilic Organic Carbon kg/kg BCDRY Hydrophobic Black Carbon kg/kg BCWET Hydrophilic Black Carbon kg/kg Missing