Maps of the Chukchi and Beaufort seas and sea level pressure. (a) Location of oceanographic mooring CA13 shown with black numbered cross. The red dot indicates the tide gauge in Tuktoyaktuk. Orange, yellow, and green arrows show circulation associated with the shelfbreak jet over the Chukchi Sea and western and eastern Beaufort Sea, respectively. The red rectangle delineates the area where the sea-ice time series is derived. (b, c) Mean sea level pressure (SLP, kPa) for the most energetic (b) surface-intensified velocity event during 5–20 October 2004 (#7U) and (c) depth-intensified velocity-event during 1–10 January 2005 (#10D). The SLP maps show two consecutive Pacific-born cyclones passing (b) south and (c) north of Alaska. Crosses depict the daily position of the low center for days in (b) October 2004 and (c) January 2005. The pink and light blue lines mark the cyclone pathways. Blue circles mark the grid nodes used for calculating the SLP difference. DOI: https://doi.org/10.1525/elementa.321.f1