This is music about a place I have never seen. A tarn is a high pond or lake that rests in a cirque scoured by glacial action, and filled with rainwater or runoff from the surrounding mountains.
The tarn that is the subject of this tune exists, and I hope to reach it this summer. Until then, this is my impression of a day where clouds swirl around the mountain peaks but down in this sheltered bowl, you can watch the rain drops splash into the calm surface of a pure mountain lake.