TERRAPUB Journal of Oceanography

Journal of Oceanography, Vol. 55 (No. 1), pp. 79-85, 1999

A Recent Full-Depth Survey of the Alaskan Stream

R. K. Reed and P. J. Stabeno

National Oceanic and Atmospheric Administration, Pacific Marine Environmental Laboratory, Seattle, Washington 98115, U.S.A.

(Received 19 May 1998; in revised form 12 October 1998; accepted 21 November 1998)

Abstract: We examine results from a cruise in May 1997. CTD casts to near the bottom were made south of the Aleutian Islands, across Amchitka Pass, and north of the islands. We computed a westward geostrophic speed of 123 cm s-1 at 173.5W in the Alaskan Stream. The computed volume transport there, referred to the bottom, was 25 106 m3s-1. On other similar sections, transports were 8-15 106 m3s-1. Various complex variations in geopotential height along the Stream apparently altered the cross-stream gradients, and hence the transports. Rotational tendencies were also present. Northward inflow through Amchitka Pass was quite strong (6 106 m3s-1). Data north of the islands supported the existence of a zero-velocity reference level of variable depth.

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