\ifthenelse{\equal{IJMPB}{\TschStyle}}{% 
%
\begin{table}[htbp] 
\tbl{Three versions of an idealized Earth's atmosphere
     and the associated gas volume concentrations, 
     including the working hypothesis chosen for this paper}
{
\begin{tabular}{@{}lcccc@{}} \Hline 
\\[-1.8ex] 
Gas            & Formula                     & U.S.\ Standard 1976             & Hardy \textit{et al.} 2005 & Working                 \\
               &                             & Ref.~\refcite{Lide2002}         & Ref.~\refcite{Hardy2005}  & hypothesis              \\
               &                             & [{\rm Vol}\,\%]                 & [{\rm Vol}\,\%]           & [{\rm Vol}\,\%]         \\[0.8ex] 
\hline                                                                                                                               \\[-1.8ex] 
Nitrogen       & ${\rm N}_2$                 & $\phantom{}78.084\phantom{0}$   & $\phantom{}78.09$         & $\phantom{}78.09$       \\
Oxygen         & ${\rm O}_2$                 & $\phantom{}20.9476\phantom{}$   & $\phantom{}20.95$         & $\phantom{}20.94$       \\
Argon          & ${\rm Ar}$                  & $\phantom{0}0.934\phantom{0}$   & $\phantom{0}0.93$         & $\phantom{0}0.93$       \\
Carbon dioxide & ${\rm CO}_2$                & $\phantom{0}0.0314\phantom{}$   & $\phantom{0}0.03$         & $\phantom{0}0.04$       \\[0.8ex]
\hline                                                                                                                               \\[-1.8ex] 
\end{tabular}
}
\label{table:PB002}
\end{table}
% 
}{}
\ifthenelse{\equal{arXivOrTeX4ht}{\TschStyles}}{% 
%
\begin{table}[htbp] 
{
\begin{center}
\vspace*{0.5cm}
\begin{tabular}{|l|c|c|c|c|}
\hline
Gas            & Formula                     & U.S.\ Standard 1976             & Hardy \textit{et al.} 2005 & Working                 \\
               &                             & Ref.~\cite{Lide2002}            & Ref.~\cite{Hardy2005}     & hypothesis              \\
               &                             & [{\rm Vol}\,\%]                 & [{\rm Vol}\,\%]           & [{\rm Vol}\,\%]         \\ 
\hline                                                                                                                                
Nitrogen       & ${\rm N}_2$                 & $\phantom{}78.084\phantom{0}$   & $\phantom{}78.09$         & $\phantom{}78.09$       \\
Oxygen         & ${\rm O}_2$                 & $\phantom{}20.9476\phantom{}$   & $\phantom{}20.95$         & $\phantom{}20.94$       \\
Argon          & ${\rm Ar}$                  & $\phantom{0}0.934\phantom{0}$   & $\phantom{0}0.93$         & $\phantom{0}0.93$       \\
Carbon dioxide & ${\rm CO}_2$                & $\phantom{0}0.0314\phantom{}$   & $\phantom{0}0.03$         & $\phantom{0}0.04$       \\
\hline                                                                                                                                
\end{tabular}
\vspace*{0.0cm}
\end{center}
}
\caption{Three versions of an idealized Earth's atmosphere
         and the associated gas volume concentrations, 
         including the working hypothesis chosen for this paper}
\label{table:PB002}
%
\vspace*{0.5cm}
%
\end{table}
%
}{}
