Composition (ppt by volume unless otherwise stated) Gas Clean continental, Seinfeld & Pandis (2016) Simpson et al. (2010) Carbon monoxide, CO (ppb) 40-200  p39 97  Nitric oxide, NO 16 Ethane, C2H6 781 Propane, C3H8 200 Isoprene, C5H8 311 Benzene, C6H6 11 Methanol, CH3OH 1967 Ethanol, C2H5OH 75 Trichlorofluoromethane, CCl3F 237 p41 252.7 Dichlorodifluoromethane, CCl2F2 530 p41 532.3 Chloromethane, CH3Cl 503 Bromomethane, CH3Br 9–10 p44 7.7 Iodomethane, CH3I 0.36 Carbonyl sulfide, OCS 510 p26 413 Sulfur dioxide, SO2 70–200 p26 102 Hydrogen sulfide, H2S 15–340 p26 Carbon disulfide, CS2 15–45 p26 Formaldehyde, H2CO 9.1 ppb p37, polluted Acetylene, C2H2 8.6 ppb p37, polluted Ethene, C2H4 11.2 ppb p37, polluted 20 Sulfur hexafluoride, SF6 7.3 p41 Carbon tetrafluoride, CF4 79 p41 Total gaseous mercury, Hg + 0.209 p55
Composition (ppt by volume unless otherwise stated) Gas Clean continental, Seinfeld & Pandis (2016) Simpson et al. (2010) Carbon monoxide, CO 40-200 ppb p39 97 ppb Nitric oxide, NO 16 Ethane, C2H6 781 Propane, C3H8 200 Isoprene, C5H8 311 Benzene, C6H6 11 Methanol, CH3OH 1967 Ethanol, C2H5OH 75 Trichlorofluoromethane, CCl3F 237 p41 252.7 Dichlorodifluoromethane, CCl2F2 530 p41 532.3 Chloromethane, CH3Cl 503 Bromomethane, CH3Br 9–10 p44 7.7 Iodomethane, CH3I 0.36 Carbonyl sulfide, OCS 510 p26 413 Sulfur dioxide, SO2 70–200 p26 102 Hydrogen sulfide, H2S 15–340 p26 Carbon disulfide, CS2 15–45 p26 Formaldehyde, H2CO 9.1 ppb p37, polluted Acetylene, C2H2 8.6 ppb p37, polluted Ethene, C2H4 11.2 ppb p37, polluted 20 Sulfur hexafluoride, SF6 7.3 p41 Carbon tetrafluoride, CF4 79 p41 Total gaseous mercury, Hg 0.209 p55
D
(ppb)
A
ppb
A
ppb
D
+