Table 3 Variable difference dimension of PM2.5 concentrations.
From: Heterogeneity and the determinants of PM2.5 in the Yangtze River Economic Belt
Year | Isotropic | South–North (0°) | Northeast–Southwest (45°) | East–West (90°) | Southeast–Northwest (135°) | |||||
|---|---|---|---|---|---|---|---|---|---|---|
D | R2 | D | R2 | D | R2 | D | R2 | D | R2 | |
2000 | 1.536 | 0.959 | 1.517 | 0.847 | 1.430 | 0.985 | 1.603 | 0.918 | 1.527 | 0.922 |
2007 | 1.482 | 0.977 | 1.554 | 0.763 | 1.409 | 0.997 | 1.464 | 0.914 | 1.520 | 0.756 |
2017 | 1.453 | 0.936 | 1.509 | 0.774 | 1.292 | 0.985 | 1.258 | 0.787 | 1.567 | 0.611 |
