The translation of isolated cold eddies on a sloping bottom

摘要: A two-layer analytical model is considered to examine the dynamics of cold isolated patches on ocean floor. Such have been observed in North Atlantic Ocean and are characterized by a bounding interface that intersects bottom along closed curve. They correspond, therefore, anticyclonic eddies with lens-like cross section. The incorporates steady movements resulting from swirl velocity within eddy topographically-induced translation. The assumed be frictionless nondiffusive but not restricted quasigeostrophic sense Rossby number necessarily small. For motions, solutions obtained using full equations motion coordinate system moving itself. A uniformly sloping causes translation at 90° right downhill direction. Thus, predicts an floor will migrate lines constant depth. Suprisingly, predicted speed depends only gravitational acceleration, density difference between layers, Coriolis parameter, slope. It independent intensity, size, depth eddy. For range parameters typical for deep ocean, 5 10 cm s−1. estimated may able carry temperature anomalies few thousand kilometers away their origin.