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. Author manuscript; available in PMC: 2017 May 1.
Published in final edited form as: Atmos Environ (1994). 2016 May;132:229–239. doi: 10.1016/j.atmosenv.2016.03.001

Table 2.

Mobile Platform Pearson’s Correlation Coefficients, Summer

UFPN PN1 PNFine PN (1-3μm) BC NOx mob. CO O3 depl.
UFPN 0.94 0.77 0.82 0.84 0.8 0.33 0.8
PN1 0.94 0.72 0.8 0.84 0.86 0.28 0.78
PNFine 0.77 0.72 0.84 0.74 0.59 0.25 0.75
PN (1-3μm) 0.82 0.8 0.84 0.76 0.73 0.39 0.78
BC 0.84 0.84 0.74 0.76 0.84 0.47 0.71
NOx mob. 0.8 0.86 0.59 0.73 0.84 0.5 0.75
CO 0.33 0.28 0.25 0.39 0.47 0.5 0.42
O3 depl. 0.8 0.78 0.75 0.78 0.71 0.75 0.42
VOC 0.52 0.48 0.44 0.57 0.52 0.47 0.49 0.43

The 2 sided probability p = 0.01 critical value for Pearson’s correlation coefficients is 0.40 for N = 40. The correlations coefficients are calculated using the medians derived for each sampling intersection after temporal adjustment as described in section 2.1.