Horizontal and Vertical Structures of a Warm Eddy above the Yamato Rise (original) (raw)

Umi no kenkyū, 1992

Abstract

Spatial structure of a warm eddy which was located stably above the western side of the Yamato Rise was described in detail by examining hydrographic data, NOAA-infrared image, and current data in summer 1989. The doughnut-like flow structure surrounding a warm-core was found to play a significant role in the northward transport of warm and salin water in summer. However, it was inferred from the analysis of hydrographic data through the year that the above doughnut-like flow disappeared in winter and drastic structural variations of an eddy were brought by wintertime convection. During winter, not only the core-temperature but also the salinity decreased and the shape of an eddy became unclear, suggesting the exchange of a core water with the outer one.

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