Frictionally induced circulations and spin down of a warm‐core ring

American Geophysical Union (AGU) - Tập 90 Số C5 - Trang 8917-8927 - 1985
Glenn R. Flierl, Richard P. Mied

Tóm tắt

Meridional motion driven by kinematic viscosity v and thermal diffusivity k within a warm‐core ring is examined. An analytic quasi‐geostrophic model is constructed that shows that the vertical mixing of heat or momentum is ineffective in driving secondary motion. Single‐celled meridional flows will occur within the ring whenever the Prandtl number Pr = vh/κh is not equal to 1. When Pr is greater than 1, the flow is up in the ring core, while Pr less than 1 causes downward motion at ring center. A numerical primitive equation model leads to qualitatively identical results but shows that the secondary flow is not long‐lived when Pr is less than 1, decaying within 2 months, while in the Pr greater than 1 case the flows are still vigorous at the end of the experiment (90 days).

Từ khóa


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American Geophysical Union (AGU)

Tập 90 Số C5

8917-8927

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