New branch for pr, added images and added the diagram into tutorial

Author: chloe-hancock

_static/melt_on_off_glacier_1.png

@@ -511,7 +511,13 @@
     "The total annual runoff consists of the following components:\n",
     "- melt off-glacier: snow melt on areas that are now glacier free (i.e. 0 in the year of largest glacier extent, in this example at the start of the simulation)\n",
     "- melt on-glacier: ice + seasonal snow melt on the glacier\n",
-    "- liquid precipitaton on- and off-glacier (the latter being zero at the year of largest glacial extent, in this example at start of the simulation)"
+    "- liquid precipitaton on- and off-glacier (the latter being zero at the year of largest glacial extent, in this example at start of the simulation)\n",
+    "\n",
+    "The diagrams below show the melt on-glacier and melt off-glacier components, where time T is anytime in the simulation for a receding glacier:\n",
+    "\n",
+    "<img src=\"../_static/melt_on_off_glacier_1.png\" width=\"500px\" alt=\"Fig 2\">\n",
+    "\n",
+    "<img src=\"../_static/melt_on_off_glacier_2.png\" width=\"500px\" alt=\"Fig 2\">"
    ]
   },
   {