Table 6.
Temporal trends (ppb/year) in CMAQ ozone and emission-dependent ozone with a (95% confidence interval for the slope for different periods. Blue: significant negative slopes; red: significant positive slopes.
| period: | 1990-2010 | 1990-2000 | 2000-2010 | |||
|---|---|---|---|---|---|---|
| ozone: | CMAQ | emission-dep | CMAQ | emission-dep | CMAQ | emission-dep |
| Region | ||||||
| NE | −0.39 (0.20) | −0.24 (0.02) | −0.25 (0.66) | −0.059(0.060) | −0.23 (0.63) | −0.65 (0.06) |
| MA | −0.62 (0.24) | −0.29 (0.03) | 0.10 (0.64) | 0.090 (0.06) | −0.83 (0.59) | −1.07 (0.20) |
| MW | −0.29 (0.26) | −0.18 (0.02) | −0.25 (0.66) | 0.080(0.079) | −1.00 (0.71) | −0.69 (0.08) |
| S | −0.33 (0.28) | −0.19 (0.02) | 0.62 (0.73) | 0.15 (0.09) | −1.17 (0.76) | −0.75 (0.14) |
| W | 0.11 (0.16) | −0.03 (0.01) | 0.27 (0.42) | 0.03 (0.05) | −0.40 (0.52) | −0.151(0.150) |
| NW | −0.01 (0.11) | −0.023 (0.004) | −0.09 (0.42) | 0.001 (0.03) | 0.00 (0.41) | −0.12 (0.02) |
| WC | 0.005 (0.114) | −0.007 (0.001) | −0.05(0.32) | −0.025(0.029) | −0.01 (0.40) | −0.05 (0.02) |
| SW | −0.05 (0.19) | −0.07 (0.01) | 0.40 (0.51) | 0.024 (0.31) | −0.18 (0.10) | −0.25 (0.04) |