Table 2.

Measured constituents and assigned clusters in the full population and smoky coal subgroup.

Pollutant	Full name	Full population cluster	Smoky population cluster
${\mathrm{NO}}_2$	Nitrogen dioxide	${\mathrm{NO}}_2$	$\text{PAH}29+$
${\mathrm{SO}}_2$	Sulfur dioxide	${\mathrm{SO}}_2$	$\text{PAH}29+$
ANT	Anthanthrene	WB7	WB2
BC	Black carbon	WB7	$\text{PAH}5+$
CdP	Cyclopenta(c,d)pyrene	WB7	WB2
FLT	Fluoranthene	WB7	$\text{PAH}29+$
${\mathrm{PM}}_{2.5}$	Fine particulate matter with aerodynamic diameter $\le 2.5\mathrm{\mu }\mathrm{m}$	WB7	$\text{PAH}29+$
PYR	Pyrene	WB7	$\text{PAH}29+$
RET	Retene	WB7	RET
DlP	Dibenzo(a,l)pyrene	PAH2	PAH2
NkF	Naphtho(2,3,k)fluoranthene	PAH2	PAH2
6MC	6-Methylchrysene	PAH7	$\text{PAH}29+$
BbP	Benzo(b)perylene	PAH7	$\text{PAH}5+$
BjA	Benz(j,e)aceanthrylene	PAH7	$\text{PAH}5+$
DhP	Dibenzo(a,h)pyrene	PAH7	$\text{PAH}5+$
DiP	Dibenzo(a,i)pyrene	PAH7	$\text{PAH}5+$
DMBA	7,12-Dimethylbenz(a)anthracene	PAH7	$\text{PAH}29+$
NaP	Naphtho(2,3,a)pyrene	PAH7	$\text{PAH}5+$
1MP	1-Methylpyrene	PAH25	$\text{PAH}29+$
5MC	5-Methyl chrysene	PAH25	$\text{PAH}29+$
BaA	Benz(a)anthracene	PAH25	$\text{PAH}29+$
BaC	Benzo(a)chrysene	PAH25	$\text{PAH}29+$
BaF	Benzo(a)fluorene	PAH25	$\text{PAH}29+$
BaP	Benzo(a)pyrene	PAH25	$\text{PAH}29+$
BbF	Benzo(b)fluorene	PAH25	$\text{PAH}29+$
BbT	Benzo(b)fluoranthene	PAH25	$\text{PAH}29+$
BcF	Benzo(c)fluorene	PAH25	$\text{PAH}29+$
BeP	Benzo(e)pyrene	PAH25	$\text{PAH}29+$
BgP	Benzo(g,h,i)perylene	PAH25	$\text{PAH}29+$
BjF	Benzo(j)fluoranthene	PAH25	$\text{PAH}29+$
BkF	Benzo(k)fluoranthene	PAH25	$\text{PAH}29+$
CHR	Chrysene	PAH25	$\text{PAH}29+$
COR	Coronene	PAH25	$\text{PAH}29+$
DBA	Dibenzo(a,h)anthracene	PAH25	$\text{PAH}29+$
DBF	Dibenzo(a,e)fluoranthene	PAH25	$\text{PAH}29+$
DBT	Dibenzothiophene	PAH25	$\text{PAH}29+$
DelP	Dibenzo(e,l)pyrene	PAH25	$\text{PAH}29+$
DeP	Dibenzo(a,e)pyrene	PAH25	$\text{PAH}29+$
IPY	Indeno(1,2,3)pyrene	PAH25	$\text{PAH}29+$
NbF	Naphtho(1,2,b)fluoranthene	PAH25	$\text{PAH}29+$
NeP	Naphtho(2,3,e)pyrene	PAH25	$\text{PAH}29+$
NjF	Naphtho(2,3,j)fluoranthene	PAH25	$\text{PAH}29+$

Note: PAH, polycyclic aromatic hydrocarbon.