Table 1. Summary of isoprene and monoterpene SOA tracers (ng/m3) during the CHINARE 2008 and CHINARE 09/10.
| Abbr. | average | median | min | max | SD a | |
|---|---|---|---|---|---|---|
| isoprene SOA tracers | ||||||
| cis-2-methyl-1,3,4-trihydroxy-1-butene | MTHB1 | 0.071 | 0.013 | ND b | 0.78 | 0.15 |
| 3-methyl-2,3,4-trihydroxy-1-butene | MTHB2 | 0.081 | 0.019 | ND | 1.8 | 0.24 |
| trans-2-methyl-1,3,4-trihydroxy-1-butene | MTHB3 | 0.22 | 0.060 | ND | 2.8 | 0.45 |
| 2-methylglyceric acid | MGA | 0.79 | 0.11 | ND | 6.8 | 1.5 |
| 2-methylthreitol | MTL1 | 2.1 | 0.89 | ND | 11 | 2.8 |
| 2-methylerythritol | MTL2 | 5.2 | 1.8 | 0.015 | 24 | 6.5 |
| C5-alkene triols c | 0.37 | 0.079 | ND | 3.8 | 0.72 | |
| 2-methyltetrols d | MTLs | 7.3 | 2.8 | 0.018 | 34 | 9.3 |
| sum of isoprene SOA tracers | 8.5 | 3.1 | 0.018 | 36 | 11 | |
| monoterpene SOA tracers | ||||||
| cis-pinonic acid | PNA | 0.09 | 0.032 | ND | 0.69 | 0.16 |
| pinic acid | PA | 0.21 | 0.019 | ND | 2.9 | 0.48 |
| 3-methyl-1,2,3-butanetricarboxylic acid | MBTCA | 0.97 | 0.017 | ND | 8.0 | 1.9 |
| 3-hydroxyglutaric acid | HGA | 1.2 | 0.20 | ND | 10 | 2.2 |
| 3-hydroxy-4,4-dimethylglutaric acid | HDMGA | 0.56 | 0.047 | ND | 6.1 | 1.3 |
| sum of monoterpenes SOA tracers | 3.0 | 0.62 | 0.045 | 20 | 5.0 | |
| SOCisoprenee (ngC/m3) | 52 | 20 | 0.12 | 220 | 65 | |
| SOCmonoterpene f (ngC/m3) | 13 | 2.7 | 0.19 | 84 | 22 |
aSD is one standard deviation. bND means not detect. cSum of cis-2-methyl-1,3,4-trihydroxy-1-butene, 3-methyl-2,3,4-trihydroxy-1-butene and trans-2-methyl-1,3,4-trihydroxy-1-butene. dSum of 2-methylthreitol and 2-methylerythritol. eSOC from isoprene. fSOC from monoterpene.