Table 4.
Pearson correlation matrix between daily mean concentrations of PM10, PM2.5, NO2 and SO2 and meteorological parameters viz., AT, RH, WS and WD in the burning period of rabi and kharif seasons over Haryana and Delhi.
| NO2 (μg/m3) | SO2 (μg/m3) | PM10 (μg/m3) | PM2.5 (μg/m3) | WS (m/s) | AT (ºC) | RH (%) | |
|---|---|---|---|---|---|---|---|
| a. Rabi (Haryana) | |||||||
| NO2 | 1 | -.07 | .12 | .07 | -.37∗∗ | .30 | -.22 |
| SO2 | -.07 | 1 | -.00 | -.29∗ | .01 | -.25 | .02 |
| PM10 | .12 | -.00 | 1 | .79∗∗ | .22 | .57∗∗ | -.55∗∗ |
| PM2.5 | .07 | -.29∗ | .79∗∗ | 1 | .08 | .55∗∗ | -.48∗∗ |
| WS | -.37∗∗ | .01 | .22 | .08 | 1 | .13 | -.11 |
| AT | .30 | -.25 | .57∗∗ | .55∗∗ | .13 | 1 | -.88∗∗ |
| RH |
-.22 |
.02 |
-.55∗∗ |
-.48∗∗ |
-.11 |
-.88∗∗ |
1 |
| b. Rabi (Delhi) | |||||||
| NO2 | 1 | .45∗∗ | .11 | -.14 | -.57∗∗ | .16 | -.47∗∗ |
| SO2 | .45∗∗ | 1 | .26 | .15 | -.28 | -.26 | -.34∗ |
| PM10 | .11 | .26 | 1 | .60∗∗ | -.01 | .32 | -.69∗∗ |
| PM2.5 | -.14 | .15 | .60∗∗ | 1 | .01 | .30 | -.56∗∗ |
| WS | -.56∗∗ | -.28 | -.01 | .01 | 1 | .13 | .13 |
| AT | .16 | -.26 | .32 | .30 | .13 | 1 | .76∗∗ |
| RH |
-.47∗∗ |
-.34∗ |
-.69∗∗ |
-.56∗∗ |
.13 |
.76∗∗ |
1 |
| c. Kharif (Haryana) | |||||||
| NO2 | 1 | .52∗∗ | .07 | .13 | .03 | -.71∗∗ | -.49∗∗ |
| SO2 | .52∗∗ | 1 | .54∗∗ | .42∗∗ | -.13 | -.34∗ | -.34∗∗ |
| PM10 | .07 | .54∗∗ | 1 | .88∗∗ | -.25∗ | -.09 | -.07 |
| PM2.5 | .13 | .42∗∗ | .88∗∗ | 1 | -.19 | -.07 | -.05 |
| WS | .03 | -.13 | -.25∗ | -.19 | 1 | -.20 | -.26∗ |
| AT | -.71∗∗ | -.34∗ | -.09 | -.07 | -.20 | 1 | .37∗ |
| RH |
-.49∗∗ |
-.34∗∗ |
-.07 |
-.05 |
-.26∗ |
.37∗ |
1 |
| d. Kharif (Delhi) | |||||||
| NO2 | 1 | -.33∗ | .13 | .06 | -.42∗∗ | .50∗∗ | .23 |
| SO2 | -.33∗ | 1 | .28 | .39∗ | .02 | -.62∗∗ | -.00 |
| PM10 | .13 | .28 | 1 | .94∗∗ | -.45∗∗ | -.22 | .57∗∗ |
| PM2.5 | .06 | .39∗ | .94∗∗ | 1 | -.30 | -.43∗∗ | .50∗∗ |
| WS | -.42∗∗ | .02 | -.45∗∗ | -.30 | 1 | -.03 | -.46∗∗ |
| AT | .50∗∗ | -.62∗∗ | -.22 | -.43∗∗ | -.03 | 1 | -.19 |
| RH | .23 | -.00 | .57∗∗ | .50∗∗ | -.46∗∗ | -.19 | 1 |
∗
Correlation is significant at the 0.05 level (2-tailed).
∗∗
Correlation is significant at the 0.01 level (2-tailed).