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. Author manuscript; available in PMC: 2016 May 1.
Published in final edited form as: Atmos Environ (1994). 2015 Feb 24;109:61–69. doi: 10.1016/j.atmosenv.2015.02.056

Table B2.

Correlation matrix for principal component analysis

SO2HR24 NOHR24 NO2HR24 O3HR24 COHR24 PM25 OC EC Na Mg Al K Ca Ti Mn Fe Cu
SO2HR24 1.000 0.118 0.497 0.020 0.545 0.620 0.528 0.526 0.640 0.357 0.320 0.754 0.234 0.236 0.562 0.497 0.448
NOHR24 0.118 1.000 0.706 −0.550 0.184 0.031 0.509 0.545 0.312 0.264 0.427 0.122 0.379 0.368 0.387 0.384 0.086
NO2HR24 0.497 0.706 1.000 −0.528 0.532 0.534 0.869 0.848 0.694 0.381 0.579 0.550 0.456 0.470 0.698 0.610 0.523
O3HR24 0.020 −0.550 −0.528 1.000 −0.184 0.043 −0.247 −0.299 −0.125 −0.001 −0.255 −0.143 −0.145 −0.123 −0.258 −0.242 0.035
COHR24 0.545 0.184 0.532 −0.184 1.000 0.677 0.523 0.519 0.618 0.277 0.306 0.740 0.214 0.237 0.629 0.537 0.448
PM25 0.620 0.031 0.534 0.043 0.677 1.000 0.726 0.693 0.852 0.390 0.396 0.757 0.368 0.421 0.633 0.566 0.763
OC 0.528 0.509 0.869 −0.247 0.523 0.726 1.000 0.897 0.803 0.389 0.516 0.601 0.446 0.499 0.687 0.595 0.694
EC 0.526 0.545 0.848 −0.299 0.519 0.693 0.897 1.000 0.771 0.432 0.570 0.581 0.481 0.511 0.678 0.631 0.612
Na 0.640 0.312 0.694 −0.125 0.618 0.852 0.803 0.771 1.000 0.633 0.647 0.768 0.621 0.687 0.803 0.772 0.745
Mg 0.357 0.264 0.381 −0.001 0.277 0.390 0.389 0.432 0.633 1.000 0.902 0.446 0.944 0.901 0.628 0.802 0.288
Al 0.320 0.427 0.579 −0.255 0.306 0.396 0.516 0.570 0.647 0.902 1.000 0.436 0.936 0.912 0.669 0.867 0.324
K 0.754 0.122 0.550 −0.143 0.740 0.757 0.601 0.581 0.768 0.446 0.436 1.000 0.380 0.371 0.669 0.655 0.497
Ca 0.234 0.379 0.456 −0.145 0.214 0.368 0.446 0.481 0.621 0.944 0.936 0.380 1.000 0.952 0.637 0.808 0.291
Ti 0.236 0.368 0.470 −0.123 0.237 0.421 0.499 0.511 0.687 0.901 0.912 0.371 0.952 1.000 0.732 0.801 0.375
Mn 0.562 0.387 0.698 −0.258 0.629 0.633 0.687 0.678 0.803 0.628 0.669 0.669 0.637 0.732 1.000 0.727 0.555
Fe 0.497 0.384 0.610 −0.242 0.537 0.566 0.595 0.631 0.772 0.802 0.867 0.655 0.808 0.801 0.727 1.000 0.391
Cu 0.448 0.086 0.523 0.035 0.448 0.763 0.694 0.612 0.745 0.288 0.324 0.497 0.291 0.375 0.555 0.391 1.000
Zn Pb Ni V Se Na1 NH41 K1 Mg2 Ca2 F_ Cl_ NO3_ SO42_ BbF BeP IcP BghiP
SO2HR24 0.626 0.740 0.330 0.374 0.679 0.680 0.477 0.740 3.352 0.221 0.241 0.381 0.507 0.491 0.356 0.252 0.406 0.351
NOHR24 0.198 0.045 0.222 −0.131 0.236 0.146 −0.257 −0.035 3.356 0.322 0.415 0.035 0.051 −0.299 −0.255 −0.385 −0.098 −0.180
NO2HR24 0.643 0.525 0.427 0.072 0.730 0.684 0.179 0.419 0.503 0.402 0.458 0.358 0.572 0.097 0.029 −0.166 0.224 0.115
O3HR24 −0.269 −0.075 −0.220 −0.034 −0.291 −0.135 0.186 −0.085 −0.167 −0.154 −0.246 −0.282 −0.207 0.317 0.158 0.244 0.076 0.124
COHR24 0.704 0.755 0.420 0.455 0.724 0.593 0.530 0.667 0.164 0.099 0.064 0.494 0.568 0.451 0.577 0.480 0.632 0.595
PM25 0.652 0.823 0.327 0.310 0.757 0.775 0.852 0.718 0.392 0.323 0.276 0.607 0.838 0.819 0.599 0.484 0.701 0.639
OC 0.602 0.621 0.360 0.035 0.713 0.614 0.358 0.450 0.439 0.351 0.401 0.341 0.630 0.303 0.142 −0.047 0.353 0.239
EC 0.627 0.655 0.346 0.065 0.750 0.669 0.400 0.489 0.497 0.408 0.446 0.365 0.672 0.345 0.194 0.013 0.372 0.276
Na 0.669 0.796 0.516 0.355 0.730 0.866 0.572 0.653 0.613 0.524 0.513 0.547 0.728 0.566 0.408 0.265 0.566 0.471
Mg 0.383 0.332 0.567 0.328 0.338 0.525 0.091 0.302 0.799 0.814 0.801 0.200 0.254 0.146 0.114 0.048 0.175 0.113
Al 0.460 0.349 0.580 0.242 0.474 0.557 0.031 0.294 0.855 0.875 0.879 0.252 0.347 0.052 −0.018 −0.121 0.087 0.004
K 0.747 0.852 0.480 0.488 0.804 0.777 0.582 0.936 0.419 0.320 0.314 0.630 0.671 0.537 0.542 0.428 0.596 0.535
Ca 0.346 0.259 0.533 0.264 0.314 0.507 0.033 0.236 0.862 0.901 0.899 0.207 0.268 0.077 0.018 −0.063 0.114 0.043
Ti 0.395 0.309 0.593 0.337 0.316 0.557 0.081 0.229 0.837 0.858 0.853 0.183 0.298 0.136 0.032 −0.049 0.143 0.069
Mn 0.839 0.702 0.755 0.627 0.703 0.728 0.315 0.539 0.595 0.526 0.537 0.369 0.554 0.296 0.292 0.156 0.403 0.328
Fe 0.553 0.597 0.556 0.308 0.600 0.694 0.235 0.532 0.757 0.740 0.737 0.381 0.480 0.231 0.209 0.092 0.316 0.233
Cu 0.602 0.664 0.282 0.195 0.614 0.577 0.546 0.418 0.269 0.198 0.170 0.412 0.637 0.530 0.349 0.228 0.480 0.411
SO2HR24 NOHR24 NO2HR24 O3HR24 COHR24 PM25 OC EC Na Mg Al K Ca Ti Mn Fe Cu
Zn 0.626 0.198 0.643 −0.269 0.704 0.652 0.602 0.627 0.669 0.383 0.460 0.747 0.346 0.395 0.839 0.553 0.602
Pb 0.740 0.045 0.525 −0.075 0.755 0.823 0.621 0.655 0.796 0.332 0.349 0.852 0.259 0.309 0.702 0.597 0.664
Ni 0.330 0.222 0.427 −0.220 0.420 0.327 0.360 0.346 0.516 0.567 0.580 0.480 0.533 0.593 0.755 0.556 0.282
V 0.374 −0.131 0.072 −0.034 0.455 0.310 0.035 0.065 0.355 0.328 0.242 0.488 0.264 0.337 0.627 0.308 0.195
Se 0.679 0.236 0.730 −0.291 0.724 0.757 0.713 0.750 0.730 0.338 0.474 0.804 0.314 0.319 0.703 0.600 0.614
Na1 0.680 0.146 0.584 −0.135 0.593 0.775 0.614 0.669 0.866 0.525 0.557 0.777 0.507 0.557 0.728 0.694 0.577
NH41 0.477 −0.257 0.179 0.186 0.530 0.852 0.358 0.400 0.572 0.091 0.031 0.582 0.033 0.081 0.315 0.235 0.546
K1 0.740 −0.035 0.419 −0.085 0.667 0.718 0.450 0.489 0.653 0.302 0.294 0.936 0.236 0.229 0.539 0.532 0.418
Mg2 0.352 0.356 0.503 −0.167 0.164 0.392 0.439 0.497 0.613 0.799 0.855 0.419 0.862 0.837 0.595 0.757 0.269
Ca2 0.221 0.322 0.402 −0.154 0.099 0.323 0.351 0.408 0.524 0.814 0.875 0.320 0.901 0.858 0.526 0.740 0.198
F_ 0.241 0.415 0.458 −0.246 0.064 0.276 0.401 0.446 0.513 0.801 0.879 0.314 0.899 0.853 0.537 0.737 0.170
Cl_ 0.381 0.035 0.358 −0.282 0.494 0.607 0.341 0.365 0.547 0.200 0.252 0.630 0.207 0.183 0.369 0.381 0.412
NO3_ 0.507 0.051 0.572 −0.207 0.568 0.838 0.630 0.672 0.728 0.254 0.347 0.671 0.268 0.298 0.554 0.480 0.637
SO42_ 0.491 −0.299 0.097 0.317 0.451 0.819 0.303 0.345 0.566 0.146 0.052 0.537 0.077 0.136 0.296 0.231 0.530
BbF 0.356 −0.255 0.029 0.158 0.577 0.599 0.142 0.194 0.408 0.114 −0.018 0.542 0.018 0.032 0.292 0.209 0.349
BeP 0.252 −0.385 −0.166 0.244 0.480 0.484 −0.047 0.013 0.265 0.048 −0.121 0.428 −0.063 −0.049 0.156 0.092 0.228
IcP 0.406 −0.098 0.224 0.076 0.632 0.701 0.353 0.372 0.566 0.175 0.087 0.596 0.114 0.143 0.403 0.319 0.480
BghiP 0.351 −0.180 0.115 0.124 0.595 0.639 0.239 0.276 0.471 0.113 0.004 0.535 0.043 0.069 0.328 0.233 0.411
Zn Pb Ni V Se Na1 NH41 K1 Mg2 Ca2 F_ Cl_ NO3_ SO42_ BbF BeP IcP BghiP
Zn 1.000 0.804 0.694 0.638 0.869 0.657 0.436 0.663 0.323 0.245 0.253 0.506 0.637 0.364 0.418 0.280 0.479 0.422
Pb 0.804 1.000 0.436 0.444 0.849 0.809 0.681 0.823 0.309 0.203 0.182 0.681 0.766 0.633 0.625 0.498 0.691 0.634
Ni 0.694 0.436 1.000 0.653 0.493 0.463 0.074 0.355 0.497 0.454 0.422 0.277 0.358 0.050 0.067 −0.006 0.121 0.073
V 0.638 0.444 0.653 1.000 0.352 0.404 0.289 0.466 0.194 0.181 0.135 0.285 0.243 0.310 0.339 0.343 0.278 0.289
Se 0.869 0.849 0.493 0.352 1.000 0.734 0.534 0.742 0.368 0.270 0.277 0.570 0.768 0.455 0.381 0.226 0.481 0.410
Na1 0.657 0.809 0.463 0.404 0.734 1.000 0.628 0.797 0.623 0.506 0.505 0.593 0.810 0.603 0.477 0.364 0.573 0.514
NH41 0.436 0.681 0.074 0.289 0.534 0.628 1.000 0.694 0.091 0.026 −0.042 0.609 0.783 0.965 0.712 0.677 0.718 0.716
K1 0.663 0.823 0.355 0.466 0.742 0.797 0.694 1.000 0.346 0.236 0.218 0.670 0.730 0.645 0.603 0.520 0.617 0.587
Mg2 0.323 0.309 0.497 0.194 0.368 0.623 0.091 0.346 1.000 0.966 0.923 0.242 0.396 0.138 −0.023 −0.107 0.085 0.018
Ca2 0.245 0.203 0.454 0.181 0.270 0.506 0.026 0.236 0.966 1.000 0.954 0.201 0.304 0.079 −0.055 −0.120 0.034 −0.028
F_ 0.253 0.182 0.422 0.135 0.277 0.505 −0.042 0.218 0.923 0.954 1.000 0.208 0.267 −0.009 −0.084 −0.166 0.013 −0.062
Cl_ 0.506 0.581 0.277 0.285 0.570 0.593 0.609 0.670 0.242 0.201 0.208 1.000 0.716 0.471 0.564 0.485 0.618 0.581
NO3_ 0.637 0.766 0.358 0.243 0.768 0.810 0.783 0.730 0.396 0.304 0.267 0.716 1.000 0.673 0.467 0.349 0.557 0.505
SO42_ 0.364 0.633 0.050 0.310 0.455 0.603 0.965 0.645 0.138 0.079 −0.009 0.471 0.673 1.000 0.661 0.647 0.655 0.658
BbF 0.418 0.625 0.067 0.339 0.381 0.477 0.712 0.603 −0.023 −0.055 −0.084 0.564 0.467 0.661 1.000 0.976 0.957 0.975
BeP 0.280 0.498 −0.006 0.343 0.226 0.364 0.677 0.520 −0.107 −0.120 −0.166 0.485 0.349 0.647 0.976 1.000 0.889 0.932
IcP 0.479 0.691 0.121 0.278 0.481 0.573 0.718 0.617 0.085 0.034 0.013 0.618 0.557 0.655 0.957 0.889 1.000 0.989
BghiP 0.422 0.634 0.073 0.289 0.410 0.514 0.716 0.587 0.018 −0.028 −0.062 0.581 0.505 0.658 0.975 0.932 0.989 1.000