Tarns are a relic base of a glacier. Glaciers carve into the tops of mountains, creating cradle-like shapes with complex peaks around them. As they melt away, the glaciers leave behind quite particular lakes called tarns. When my supervisor asked me to map my thesis, I settled on a tarn structure because of the different disciplines that shape and flow into my thesis.
Over the coming weeks I will write about the three peaks, and what they mean in terms of stroytelling and graphic narratives about rapid environmental change.