A Comparison of Tidal Conversion Parameterizations for Tidal Models

被引：70
|
作者：
Green, J. A. Mattias [1 ]
Nycander, Jonas [2 ]
机构：
[1] Bangor Univ, Coll Nat Sci, Sch Ocean Sci, Menai Bridge LL59 5AB, Gwynedd, Wales
[2] Stockholm Univ, Dept Meteorol, S-10691 Stockholm, Sweden
来源：
JOURNAL OF PHYSICAL OCEANOGRAPHY | 2013年 / 43卷 / 01期
基金：
瑞典研究理事会;
关键词：
INTERNAL WAVES; DEEP-OCEAN; CIRCULATION; DISSIPATION; GENERATION; ENERGY; TIDES; ENERGETICS;
D O I：
10.1175/JPO-D-12-023.1
中图分类号：
P7 [海洋学];
学科分类号：
0707 ;
摘要：
The conversion of barotropic to baroclinic tidal energy in the global abyssal ocean is calculated using three different formulations. The calculations are done both "offline," that is, using externally given tidal currents to estimate the energy conversion, and "online," that is, by using the formulations to parameterize linear wave drag in a prognostic tidal model. All three schemes produce globally integrated offline dissipation rates beneath 500-m depth of similar to 0.6-0.8TW for the M-2 constituent, but the spatial structures vary significantly between the parameterizations. Detailed investigations of the energy transfer in local areas confirm the global results: there are large differences between the schemes, although the horizontally integrated conversion rates are similar. The online simulations are evaluated by comparing the sea surface elevation with data from the TOPEX/Poseidon database, and the error is then significantly lower when using the parameterization provided by Nycander than with the other two parameterizations examined.
引用
收藏
页码：104 / 119
页数：16
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