Participation of Sophie Opfergelt as a Keynote Speaker on “The Changing Arctic Critical Zone” to the CircleU Thematic seminar on “Climate Change and Water” at Humboldt-Universität in Berlin, Germany. The seminar is intended to identify intersections of various disciplines in order to develop a more holistic understanding of the theme. Another objective of this two-day event is to set a shared research agenda, within Circle U., on climate change and water. (Full program here)