A Comparison of the Mid-Latitude Eddy Fields in the Western North Atlantic and North Pacific Oceans

William J. Schmitz Jr. Woods Hole Oceanographic Institution, Woods Hole, MA 02543

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Abstract

Latitudinal distributions of estimates of eddy kinetic energy and off-diagonal component of the horizontal Reynolds stresses are demonstrated to have similar shapes at corresponding (generally western) locations, but at much different depths, in the mid-latitude North Atlantic and North Pacific Oceans. This comparison is based on direct current measurements at abyssal depths in the North Atlantic along 55°W, and on indirect estimates of upper-level velocity differences in the vertical for the North Pacific between the Izu (or Izu-Ogasawara or South Honshu) Ridge and the Shatsky Rise. These sections span the more energetic segments of the Kuroshio Extension and Gulf Stream systems.

Abstract

Latitudinal distributions of estimates of eddy kinetic energy and off-diagonal component of the horizontal Reynolds stresses are demonstrated to have similar shapes at corresponding (generally western) locations, but at much different depths, in the mid-latitude North Atlantic and North Pacific Oceans. This comparison is based on direct current measurements at abyssal depths in the North Atlantic along 55°W, and on indirect estimates of upper-level velocity differences in the vertical for the North Pacific between the Izu (or Izu-Ogasawara or South Honshu) Ridge and the Shatsky Rise. These sections span the more energetic segments of the Kuroshio Extension and Gulf Stream systems.

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