Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Spearman’s correlation between environmental variables, December to February 2000 to 2012
| Tmax | Relative humidity | O 3 | PM 10 | |
|---|---|---|---|---|
|
Relative humidity |
-0.35** |
|
|
|
|
O
3
|
0.26** |
-0.31** |
|
|
|
PM
10
|
0.33** |
-0.29** |
0.36** |
|
| NO 2 | -0.02 | 0.04 | -0.03 | 0.13** |
**P <0.01 (two-tailed). Number of days: 1,083. Tmax, daily maximum temperature in centigrade; O3, ozone; PM10, particulate matter with <10 micrometers in aerodynamic diameter; NO2, nitrogen dioxide.
