Fix the vertical interpolation of POLCOMS derived temperature and salinity...

Fix the vertical interpolation of POLCOMS derived temperature and salinity profiles. This is because POLCOMS starts its vertical layers from the seabed whilst FVCOM from the sea surface

fvcom_prepro/replace_FVCOM_restart_vars.m

@@ -275,9 +275,12 @@ for xi = 1:nx
             % Now get the POLCOMS depth at this node for the time index
             % identified above.
             tpz = xdepth(yi, :); 
-            ytemp(yi, :) = interp1(tpz, xtemp(yi, :), tfz, 'linear', 'extrap');
+            % POLCOMS starts its vertical layers from the seabed, FVCOM
+            % from the surface. Flip the POLCOMS data to match FVCOM's
+            % scheme.
+            ytemp(yi, :) = interp1(tpz, fliplr(xtemp(yi, :)), tfz, 'linear', 'extrap');
             
-            ysalt(yi, :) = interp1(tpz, xsalt(yi, :), tfz, 'linear', 'extrap');
+            ysalt(yi, :) = interp1(tpz, fliplr(xsalt(yi, :)), tfz, 'linear', 'extrap');
         end
     end
     pctempz(xi, :, :) = ytemp;