SCVs are not created in the Beaufort Sea but are created at the edge of the Arctic Ocean and advected into the central Arctic. They originate in summer time flow of warm water through the Bering Strait. The depth of the eddies correspond to the depth of the Pacific temperature maximum. The likely generation are is the Barrow Canyon due to its topography. Water flowing northward across the Chukchi is concentrated into a strong current in the Barrow Canyon.
Similar flows exist in the winter.
Barrow Canyon extends 250 km cutting across continental slope from the Chukchi to the Beaufort Sea. The region of most interest is upper end of Barrow Canyon known as the Barrow Sea Valley. Cyclonic shear in the inviscid interior leads to postive potential vorticity. Because the fluid is inviscid, q is conserved and its value is set by upstream conditions. Inshore of the velocity maximum, the shear is anti-cyclonic.