{\color{blue} Fig. \ref{fig:thickness}a-d show the austral spring (Setptember) thickness of layers 10-13 ($\sigma_2=34.95,\:35.71,\:35.95,\:and\:36.28$, which reprent light and dense varieties of SAMW and AAIW. Note the trend for thickness maxima to progressively move eastward with increasing density, again in both Indian and Pacific Oceans.} \begin{figure}[!htp] \noindent\includegraphics[width=\textwidth ,angle=0]{chp5_thickness.eps}\\ \caption{Simulated layer thickness of different isopycnals (model year 2007, Sept.).} \label{fig:thickness} \end{figure}