fixed title levels on vol budget closure

Author: ifenty

Tutorials_as_Jupyter_Notebooks/ECCO_v4_Volume_budget_closure.ipynb

@@ -79,7 +79,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "# Evaluating the model sea level anomaly ``ETAN`` volume budget"
+    "## Evaluating the model sea level anomaly ``ETAN`` volume budget"
    ]
   },
   {
@@ -114,7 +114,7 @@
     "\n",
     "The ``UVELMASS, VVELMASS, WVELMASS`` and ``oceFWflx`` terms must be time-average quantities between the monthly $\\eta$ snapshots.\n",
     "\n",
-    "## Prepare environment and loading the relevant model variables"
+    "### Prepare environment and loading the relevant model variables"
    ]
   },
   {
@@ -363,7 +363,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## Create the xgcm 'grid' object\n",
+    "### Create the xgcm 'grid' object\n",
     "\n",
     "the xgcm grid object makes it easy to make flux divergence calculations across different tiles of the lat-lon-cap grid."
    ]
@@ -1771,7 +1771,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "# Predicted vs. actual $\\eta$ \n",
+    "## Predicted vs. actual $\\eta$ \n",
     "\n",
     "As we have shown, in our Boussinesq model the only term that can change global mean model sea level anomaly $\\eta$ is net surface freshwater flux.  Let us compare the time-evolution of $\\eta$ implied by surface freshwater fluxes and the actual $\\eta$ from the model output.\n",
     "\n",