Table 1. Pearson correlation coefficients of the investigated variables.
Variable | Pearson correlation (r) |
||||
---|---|---|---|---|---|
log(isoprene emission | log(O3 uptake) | [O3] | Rg | Airt | |
log(isoprene emission | 1 | 0.45 | 0.46 | 0.59 | 0.65 |
log(O3 uptake) | 0.45 | 1 | 0.49 | 0.32 | 0.36 |
[O3] | 0.46 | 0.49 | 1 | 0.34 | 0.55 |
Rg | 0.59 | 0.32 | 0.34 | 1 | 0.45 |
Airt | 0.65 | 0.36 | 0.55 | 0.45 | 1 |
For isoprene emission and ozone uptake Pearson correlations of the log-transformed values were calculated since these variables were highly non-normal. This log transformation reversed the sign of the correlations for O3 uptake. log(isoprene emission) = logarithm of isoprene emission (nmol m−2 s−1). log(O3 uptake) = logarithm of O3 uptake (nmol m−2 s−1). O3 uptake = total ozone uptake (nmol m−2 s−1). [O3] = ozone concentration (ppb). Rg = short-wave incoming radiation (W m−2). Airt = air temperature (°C).