A Comparison of Tidal Conversion Parameterizations for Tidal Models
A Comparison of Tidal Conversion Parameterizations for Tidal Models
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DOI：
10.1175/jpo-d-12-023.1
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发表时间：
2013-01-01
影响因子：
3.5
通讯作者：
Nycander, Jonas
中科院分区：
文献类型：
--
作者：
Green, J. A. Mattias;Nycander, Jonas
本文用三种不同的公式计算了全球深海正压-斜压潮汐能的转换。计算是“离线”完成的，即使用外部给定的潮流来估计能量转换，和“在线”完成的，即使用公式来参数化预测潮汐模型中的线性波阻。所有这三个方案产生的全球综合离线耗散率低于500米的深度类似于0.6-0.8TW的M-2成分，但空间结构之间的参数化变化显着。在局部地区的能量转移的详细调查证实了全球的结果：有很大的差异的计划，虽然水平集成的转换率是相似的。通过比较海面高程与TOPEX/Poseidon数据库的数据，在线模拟进行评估，然后使用Nycander提供的参数化时，误差显着低于其他两个参数化检查。
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.