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首页> 外文会议>2006 IEEE US/EU Baltic International Symposium >The BSH's new operational circulation model using general vertical co-ordinates
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The BSH's new operational circulation model using general vertical co-ordinates

机译：BUSH使用常规垂直坐标的新运行循环模型

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At the Federal Maritime and Hydrographic Agency (BSH), a new model version of a circulation model is under development which will use not only an improved grid resolution but also a novel formulation of the vertical co-ordinate. The three-dimensional baroclinic circulation model (BSHcmod) is an important component of the operational model system, which has been running at the BSH for more than 20 years now. Important applications of the model system are the support of the BSH's water level prediction service, forecasting of oil drift paths and pollutant dispersion, as well as water quality studies. The circulation model simulates tidal, wind and density driven motion in the entire North Sea and Baltic Sea region. Two nested and interactively coupled grids are used for the German Bight and western Baltic Sea. The horizontal grid spacing of the new version is 900 m in the nested areas, and approx. 5 km in the other parts of the North Sea and Baltic. The vertical grid resolution has been improved as well. In addition, a new type of vertical co-ordinate representation has been implemented which allows layer thicknesses to be varied in time and space. With regard to the performance of general circulation models in a more general context, the new formulation provides a dynamic co-moving description of stratification and its maintenance. Internal dynamics are captured using weakly inclined flexible co-ordinate surfaces. The formulation is of the evolution type, and all common forms of vertical representation are recovered as special examples.
机译：在联邦海事和水文局（BSH），正在开发一种新的循环模型模型，该模型不仅将使用改进的网格分辨率，而且还将使用垂直坐标的新颖表示法。三维斜压循环模型（BSHcmod）是操作模型系统的重要组成部分，该模型已经在BSH运行了20多年。该模型系统的重要应用是BSH水位预测服务的支持，油漂流路径和污染物扩散的预测以及水质研究。循环模型模拟了整个北海和波罗的海地区的潮汐，风和密度驱动运动。两个嵌套且交互式耦合的网格用于德国海岸线和波罗的海西部。在嵌套区域中，新版本的水平网格间距为900 m，大约为200 m。在北海和波罗的海其他地区5公里。垂直网格分辨率也得到了改善。另外，已经实现了一种新型的垂直坐标表示，其允许层厚度在时间和空间上变化。关于一般循环模型在更一般情况下的性能，新的表述提供了分层及其维持的动态共同描述。内部动力是使用弱倾斜的柔性坐标表面捕获的。该表述是演化类型的，并且将垂直表示的所有常见形式作为特殊示例进行了恢复。

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