\begin{longtable}{lrrrrr}
\caption{Monthly SDM coefficients with standardized covariates}\label{tab:s_coefficients}\\
\toprule
Term & NO$_2$ & CO & SO$_2$ & O$_3$ & PM$_{10}$ \\
\midrule\endfirsthead
\multicolumn{6}{c}{Table S4 (continued)}\\
\toprule
Term & NO$_2$ & CO & SO$_2$ & O$_3$ & PM$_{10}$ \\
\midrule\endhead
\bottomrule
\endfoot
\bottomrule
\multicolumn{6}{l}{\footnotesize HAC(12) standard errors in parentheses.} \\
\multicolumn{6}{l}{\footnotesize $^{*}p<0.10$, $^{**}p<0.05$, $^{***}p<0.01$.} \\
\endlastfoot
$\rho$ & 0.844$^{***}$ & 0.793$^{***}$ & 0.837$^{***}$ & 0.859$^{***}$ & 0.882$^{***}$ \\
 & (0.005) & (0.006) & (0.005) & (0.007) & (0.006) \\
\addlinespace[1pt]
LEZ & 0.212$^{*}$ & 6.303$^{**}$ & -0.039$^{*}$ & -0.073 & -0.804$^{***}$ \\
 & (0.110) & (2.668) & (0.023) & (0.104) & (0.290) \\
\addlinespace[1pt]
Population density & -0.101 & -36.818$^{***}$ & 0.729$^{***}$ & -0.775$^{***}$ & -0.182 \\
 & (0.236) & (5.488) & (0.090) & (0.264) & (0.302) \\
\addlinespace[1pt]
Industrial area/person & 0.073$^{***}$ & 1.984$^{**}$ & -0.008 & -0.151$^{***}$ & 0.185$^{***}$ \\
 & (0.019) & (0.825) & (0.009) & (0.037) & (0.037) \\
\addlinespace[1pt]
Commercial area/person & 0.039 & -1.042 & 0.015 & 0.155$^{***}$ & -0.201$^{***}$ \\
 & (0.025) & (1.149) & (0.016) & (0.032) & (0.037) \\
\addlinespace[1pt]
Green area/person & -0.355$^{***}$ & 0.254 & -0.016 & -0.031 & 0.067 \\
 & (0.048) & (1.840) & (0.020) & (0.077) & (0.097) \\
\addlinespace[1pt]
Daily vehicle distance & 0.160$^{***}$ & 1.057 & 0.025$^{**}$ & -0.038 & 0.185$^{**}$ \\
 & (0.043) & (0.789) & (0.011) & (0.033) & (0.084) \\
\addlinespace[1pt]
Cars/person & -0.100$^{***}$ & -0.197 & -0.006 & 0.046$^{*}$ & -0.052 \\
 & (0.022) & (0.698) & (0.005) & (0.024) & (0.037) \\
\addlinespace[1pt]
Temperature & -6.897$^{***}$ & -127.998$^{***}$ & -0.755$^{***}$ & 12.222$^{***}$ & -7.287$^{***}$ \\
 & (0.534) & (15.575) & (0.269) & (0.952) & (1.267) \\
\addlinespace[1pt]
Sunshine & 0.280$^{**}$ & 9.382$^{***}$ & 0.086$^{**}$ & -0.419$^{***}$ & 0.017 \\
 & (0.124) & (2.519) & (0.041) & (0.120) & (0.130) \\
\addlinespace[1pt]
Low-wind equivalent days & 0.237$^{***}$ & 2.100 & 0.088$^{***}$ & 0.144 & 0.226$^{**}$ \\
 & (0.051) & (1.811) & (0.034) & (0.103) & (0.099) \\
\addlinespace[1pt]
Wind speed & -0.043 & 1.148 & 0.065$^{**}$ & 0.153 & 0.526$^{***}$ \\
 & (0.108) & (2.619) & (0.028) & (0.113) & (0.120) \\
\addlinespace[1pt]
Humidity & -0.432$^{**}$ & -3.258 & 0.052 & -0.240$^{*}$ & -0.122 \\
 & (0.172) & (3.455) & (0.046) & (0.128) & (0.172) \\
\addlinespace[1pt]
Precipitation & 0.037 & -1.121 & 0.001 & 0.057 & -0.095 \\
 & (0.090) & (1.539) & (0.017) & (0.088) & (0.088) \\
\addlinespace[1pt]
$W$ $\times$ LEZ & -0.504$^{***}$ & -7.782$^{***}$ & 0.026 & 0.153 & 0.791$^{**}$ \\
 & (0.158) & (2.829) & (0.021) & (0.109) & (0.318) \\
\addlinespace[1pt]
$W$ $\times$ Population density & -1.671$^{***}$ & -1.100 & -0.401$^{***}$ & 1.147$^{***}$ & -0.544$^{**}$ \\
 & (0.425) & (6.015) & (0.069) & (0.268) & (0.276) \\
\addlinespace[1pt]
$W$ $\times$ Industrial area/person & 0.121$^{***}$ & 3.638$^{***}$ & -0.077$^{***}$ & -0.247$^{***}$ & -0.026 \\
 & (0.046) & (0.855) & (0.019) & (0.078) & (0.143) \\
\addlinespace[1pt]
$W$ $\times$ Commercial area/person & 0.396$^{***}$ & 2.023 & 0.023 & 0.133 & -0.141 \\
 & (0.089) & (1.366) & (0.022) & (0.115) & (0.183) \\
\addlinespace[1pt]
$W$ $\times$ Green area/person & -0.598$^{***}$ & -11.001$^{***}$ & 0.069 & 0.165 & 0.179 \\
 & (0.214) & (3.422) & (0.067) & (0.202) & (0.186) \\
\addlinespace[1pt]
$W$ $\times$ Daily vehicle distance & -0.161$^{*}$ & -0.981 & -0.005 & 0.087 & -0.236$^{*}$ \\
 & (0.094) & (1.958) & (0.020) & (0.065) & (0.140) \\
\addlinespace[1pt]
$W$ $\times$ Cars/person & 0.182$^{***}$ & 3.118$^{***}$ & -0.021 & -0.046 & 0.058 \\
 & (0.066) & (0.986) & (0.023) & (0.057) & (0.048) \\
\addlinespace[1pt]
$W$ $\times$ Temperature & 4.994$^{***}$ & 77.497$^{***}$ & 0.280 & -9.692$^{***}$ & 4.796$^{***}$ \\
 & (0.535) & (14.222) & (0.211) & (0.853) & (1.260) \\
\addlinespace[1pt]
$W$ $\times$ Sunshine & -0.234$^{*}$ & -8.823$^{***}$ & -0.083$^{**}$ & 0.450$^{***}$ & 0.021 \\
 & (0.133) & (2.583) & (0.041) & (0.120) & (0.137) \\
\addlinespace[1pt]
$W$ $\times$ Low-wind equivalent days & -0.196$^{***}$ & -1.738 & -0.087$^{***}$ & -0.107 & -0.241$^{**}$ \\
 & (0.049) & (1.357) & (0.032) & (0.099) & (0.113) \\
\addlinespace[1pt]
$W$ $\times$ Wind speed & -0.052 & -1.283 & -0.071$^{**}$ & -0.004 & -0.625$^{***}$ \\
 & (0.103) & (2.561) & (0.029) & (0.116) & (0.126) \\
\addlinespace[1pt]
$W$ $\times$ Humidity & 0.379$^{*}$ & 2.519 & -0.053 & 0.196 & -0.030 \\
 & (0.193) & (3.867) & (0.045) & (0.131) & (0.181) \\
\addlinespace[1pt]
$W$ $\times$ Precipitation & -0.111 & 0.410 & -0.027 & 0.029 & -0.016 \\
 & (0.097) & (1.559) & (0.019) & (0.102) & (0.084) \\
\addlinespace[1pt]
\end{longtable}