\begin{table}%t2
%\centering
\par
  \caption {\label{tab2}$\alpha$-stresses inside (A) and outside (D) of the
    ionization threshold radius for four layers above the
    midplane.}
    \vspace*{-1.9mm}
\begin{tabular}{ccccccccc}
\hline\hline
\noalign{\smallskip}
 Models/ &  $M_{\rm IR}$ & & $M_{\rm ID}$ & & $M_{\rm IR6}$ &  & $M_{\rm IDEAL}$~* & \\
 /$\alpha$ stress & (A)  & (D) &  (A)  & (D) & (A)  & (D) & (A)  &  \\
\hline
$\alpha_{\pm{}1\rm H}\times {10^{-4}}$ & 2.69 & 0.83 & 2.86 & 1.13 & 4.18 & 1.22 & 5.30&\\
$\alpha_{\pm{}2\rm H}\times{10^{-4}}$ & 4.64 & 0.69 & 3.76 & 0.65 & 7.64 & 2.01 & 7.13&\\
$\alpha_{\pm{}3\rm H}\times{10^{-4}}$ &10.53 & 7.63 & 7.82 & 0.49 & 15.98 & 11.48& 12.80&\\
$\alpha_{\pm{}4\rm H}\times{10^{-4}}$ & 1.14 & 1.00 & 1.75 & 0.59 & 1.41 & 1.62 & 1.93&\\
\hline
\end{tabular}
\vspace*{-1.5mm}
\tablefoot{The mark `` * '' indicates that the steady-state has not been reached.}
\vspace*{-3.5mm}
\end{table}