Using sea-level data to constrain a finite-element primitive-equation ocean model with a local SEIK filter
Using sea-level data to constrain a finite-element primitive-equation ocean model with a local SEIK filter
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DOI：
10.1007/s10236-006-0083-0
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发表时间：
2006-08
期刊：
影响因子：
2.3
通讯作者：
L. Nerger;S. Danilov;W. Hiller;J. Schröter
中科院分区：
文献类型：
--
作者：
L. Nerger;S. Danilov;W. Hiller;J. Schröter
受到Christian Le Provost在有限元海洋建模方面的开创性工作的启发，在过去几年中开发了一种新的海洋环流模型。它采用表面三角测量和有限元法，以准确描述海岸和水深及其对海洋环流的导向作用。一个新的特点是网格设计，它允许在重力位（z）坐标中的垂直结构，而不损失灵活性，并避免了除深海最低层以外的任何地方的压力梯度误差。该模型与海平面测量和数据同化相结合，这是Christian Le Provost的另一个主要研究课题。我们应用的SEIK过滤器是在格勒诺布尔开发的，而基督教在那里教学。局部分析方案的添加改善了滤波器性能，首先，在其方差估计中以及在其均值解中。
Inspired by the pioneering work of Christian Le Provost on finite element ocean modeling, a new ocean circulation model was developed over the last few years. It applies a surface triangulation and finite elements for an accurate description of coasts and bathymetry and their steering effect on the ocean circulation. A novel feature is the mesh design, which allows a vertical structure in geopotential (z) coordinates without loss of flexibility and avoids pressure gradient errors everywhere except for the lowest layer of abyssal ocean. The model is combined with sea-level measurements and data assimilation, another major research topic of Christian Le Provost. We apply the SEIK filter that was developed in Grenoble while Christian was teaching there. The addition of a local analysis scheme improves the filter performance, first of all, in its variance estimates and also in its mean solution.