کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4552419 | 1627811 | 2010 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The role of sea water viscidity in modeling the vertical movement of internal tides
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علم هواشناسی
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چکیده انگلیسی
A numerical closure scheme has been developed to introduce dissipation processes in particular for the vertical movement of internal tides. This scheme is based on the assumption that a vertically oscillating water mass disturbs the pressure field and feels the viscosity from its neighborhood at the same time. The horizontal viscosity term, referred in this paper as the internal-tide viscosity (ITV) term, is retained in the vertical movement equation, which introduces a quasi-hydrostatic assumption. Therefore, a new expression of the total perturbation pressure has been derived. By applying this expression in a 5â²Â à5â² z-coordinate regional ocean model, the results show great improvements. With consideration of the ITV-term, the numerically enhanced vertical movement locally near a ridge has been damped in a z-coordinate system, and the propagation of internal tides away from the ridge has been converted into a more reasonable dissipative mode. With the tunable parameter Cw equals to 0.2, the values of the simulated vertical velocity have been reduced to approximately 50%. And the simulated thermocline structure has been preserved, as well.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ocean Modelling - Volume 34, Issues 3â4, 2010, Pages 63-69
Journal: Ocean Modelling - Volume 34, Issues 3â4, 2010, Pages 63-69
نویسندگان
Dan Song, Thomas Pohlmann, Xueen Chen, Dexing Wu,