Table 2.

Correlation between pairs of airborne particle metrics. London, 2002–2005.

	PNC	Chloride	Nitrate	Sulphate	BS	PM10	PM2.5	Coarse	PPM10	NPPM10	NPPM2.5	NPcoarse
PNC
Chloride	0.34
Nitrate	0.38	− 0.17
Sulphate	0.08	− 0.31	0.52
BS	0.49	− 0.16	0.46	0.35
PM10	0.30	− 0.16	0.67	0.66	0.48
PM2.5	0.31	− 0.29	0.70	0.68	0.51	0.91
Coarse	0.09	0.11	0.18	0.25	0.13	0.57	0.26
PPM10	0.72	− 0.09	0.53	0.30	0.74	0.53	0.56	0.15
NPPM10	− 0.12	− 0.16	0.43	0.55	0.20	0.68	0.60	0.49	0.11
NPPM2.5	− 0.16	− 0.39	0.48	0.68	0.28	0.67	0.68	0.31	0.14	0.86
NPcoarse	0.02	0.22	0.21	0.15	0.03	0.43	0.25	0.56	0.06	0.71	0.31