Table 3.
Correlation coefficient (p value) of meteorological parameter and the ratio (concentration at different downwind distance to canopy concentration at field center). (30 m<downwind concentration measurement height ≤100 m). u*: friction velocity, m/sec; ξ(3.3): atmospheric stability at anemometer height (3.3 m), unitless; 
(3.3): mean wind speed at anemometer height (3.3 m), m/sec; 
(3.3): mean vertical wind speed at anemometer height (3.3 m), m/sec; T: air temperature; RH: relative humidity, %; SR: solar radiation; ‘σ’ means standard deviation of the corresponding meteorological parameter
| Horizontal distance | Number of sample | u* | ξ(3.3) |
 (3.3) |
σu (3.3) | T | σ T |
 (3.3) |
σw (3.3) | RH | SR |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 0–20 m | 4 | 0.69 (NS) | 0.87 (NS) | 0.59 (NS) | −0.06 (NS) | 0.14 (NS) | −0.10 (NS) | 0.36 (NS) | −0.35 (NS) | 0.83 (NS) | −0.68 (NS) |
| 20–40 m | 10 | 0.08 (NS) | 0.48 (NS) | −0.02 (NS) | −0.19 (NS) | 0.25 (NS) | 0.06 (NS) | 0.18 (NS) | −0.18 (NS) | 0.27 (NS) | −0.50 (NS) |
| 40–60 m | 7 | −0.24 (NS) | −0.66 (NS) | −0.27 (NS) | −0.33 (NS) | −0.33 (NS) | −0.15 (NS) | 0.19 (NS) | 0.09 (NS) | −0.95 (***) | 0.27 (NS) |
| 60–140 | 4 | −0.10 (NS) | 0.65 (NS) | −0.28 (NS) | −0.90 (NS) | −0.59 (NS) | −0.56 (NS) | 0.89 (NS) | −0.76 (NS) | 0.78 (NS) | −0.89 (NS) |
NS, not significant: P > 0.005
***
Significance level: P < 0.0001.