--- MITgcm_contrib/articles/ceaice/ceaice_model.tex	2008/02/28 20:09:23	1.4
+++ MITgcm_contrib/articles/ceaice/ceaice_model.tex	2008/02/28 20:45:29	1.5
@@ -283,16 +283,13 @@
 Effective ich thickness (ice volume per unit area,
 $c\cdot{h}$), concentration $c$ and effective snow thickness
 ($c\cdot{h}_{s}$) are advected by ice velocities:
-\begin{align}
-  \frac{\partial(c\,{h})}{\partial{t}} &= - \nabla\left(\vek{u}\,c\,{h}\right) +
-  \Gamma_{h} + D_{h} \\
-  \frac{\partial{c}}{\partial{t}} &= - \nabla\left(\vek{u}\,c\right) +
-  \Gamma_{c} + D_{c} \\
-  \frac{\partial(c\,{h}_{s})}{\partial{t}} &= - \nabla\left(\vek{u}\,c\,{h}_{s}\right) +
-  \Gamma_{h_{s}} + D_{h_{s}} 
-\end{align}
+\begin{equation}
+  \label{eq:advection}
+  \frac{\partial{X}}{\partial{t}} = - \nabla\cdot\left(\vek{u}\,X\right) +
+  \Gamma_{X} + D_{X}
+\end{equation}
 where $\Gamma_X$ are the thermodynamic source terms and $D_{X}$ the
-diffusive terms for quantity $X=h, c, h_{s}$.
+diffusive terms for quantities $X=(c\cdot{h}), c, (c\cdot{h}_{s})$.
 %
 From the various advection scheme that are available in the MITgcm
 \citep{mitgcm02}, we choose flux-limited schemes