Map of cluster and instrument locations. a) Map of the Arctic Ocean with the 1000, 2000, and 3000-m bathymetry contours shown. Magenta box shows the region displayed in (b). b) Map of C2–C5 ITP-V drift tracks in 2014. Deployment locations (magenta triangles) and locations on 27 June 2014 (blue triangles) are shown. Bathymetry contours as in (a). c) Map of C3 IMBs on 21 March 2014 with ice draft measurements indicated. The ITP-V, AOFB, and AWS are co-located with the central IMB. DOI: https://doi.org/10.1525/elementa.241.f2