\label{fig:prMon} Historical$-$AMIP monthly climatology rainfall in MRI-CGCM3. The red box outlines the region of 30$^{\circ}$E--52$^{\circ}$E and 10$^{\circ}$S--12$^{\circ}$N. Only grids significant at the level 0.05 of the two-side Student's t-test are shaded.