Fixing unitconverters tutorial

Author: erikvansebille

docs/user_guide/examples/tutorial_unitconverters.ipynb

@@ -130,7 +130,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Indeed, if we multiply the value of the U field with 1852 \\* 60 \\* cos(lat) (the number of meters in 1 degree of longitude), we get the expected 1 m s<sup>-1</sup>.\n"
+    "Indeed, if we multiply the value of the U field with 1852 \\* 60 \\* cos(lat) (the number of meters in 1 degree of longitude) and the value of the V field with 1852 \\* 60 (the number of meters in 1 degree of latitude), we get the expected 1 m s<sup>-1</sup> for `u` and `v`.\n"
    ]
   },
   {
@@ -142,22 +142,13 @@
     "u, v = fieldset.UV[time, z, lat, lon]\n",
     "\n",
     "u = u * 1852 * 60 * np.cos(np.deg2rad(lat))\n",
-    "v = v * 1852 * 60 * np.cos(np.deg2rad(lat))\n",
+    "v = v * 1852 * 60\n",
     "print(f\"(u, v) = ({u}, {v})\")\n",
     "\n",
     "assert np.isclose(u, 1.0)\n",
     "assert np.isclose(v, 1.0)"
    ]
   },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "```{note}\n",
-    "It may be surprising that the conversion factor depends on latitude also for the V velocity component. This is because Parcels assumes a flux-based interpolation, so that the velocity components are defined on the faces of the grid cells, which vary in size with latitude.\n",
-    "```"
-   ]
-  },
   {
    "attachments": {},
    "cell_type": "markdown",