Table 2.
Key particle parameters of the mild and severe dust storm datasets
| Parameter | Mild storm | Severe storm |
|---|---|---|
| Φm at 0.9 m | 0.04 ± 0.02 | 0.11 ± 0.05 |
| Φm at 5 m | (1.07 ± 1.02) × 10−4 | (6.38 ± 4.39) × 10−4 |
| St at 0.9 m | 0.99 ± 0.28 | 1.28 ± 0.36 |
| St at 5 m | 0.16 ± 0.12 | 0.21 ± 0.16 |
| Stel at 0.9 m | 0.010 ± 0.006 | 0.016 ± 0.011 |
| Stel at 5 m | (5.24 ± 5.12) × 10−5 | (1.28 ± 1.06) × 10−4 |
| wt/(κuτ) at 0.9 m | 0.61 ± 0.17 | 0.52 ± 0.15 |
| wt/(κuτ) at 5 m | 0.10 ± 0.07 | 0.08 ± 0.06 |
Here, Φm is the particle-to-air mass loading ratio, St is the particle Stokes number, Stel is the electrostatic Stokes number, and wt/(κuτ) is the ratio of the vertical terminal settling velocity of dust particles wt to the typical Lagrangian vertical air velocity κuτ (with κ and uτ being the Von Kármán constant and friction velocity, respectively). The definition and estimation of these parameters are provided in the Methods section. Data are mean ± standard deviation.