A new vertical coordinate system for a 3D unstructured-grid model

被引：109
|
作者：
Zhang, Yinglong J. [1 ]
Ateljevich, Eli [2 ]
Yu, Hao-Cheng [4 ]
Wu, Chin H. [3 ]
Yu, Jason C. S. [4 ]
机构：
[1] Virginia Inst Marine Sci, Coll William & Mary, Ctr Coastal Resource Management, Gloucester Point, VA 23062 USA
[2] Calif Dept Water Resource, Sacramento, CA 95814 USA
[3] Univ Wisconsin, Coll Engn, Dept Civil & Environm Engn, Madison, WI 53706 USA
[4] Natl Sun Yat Sen Univ, Dept Marine Environm & Engn, Kaohsiung 80424, Taiwan
来源：
OCEAN MODELLING | 2015年 / 85卷
基金：
美国国家科学基金会;
关键词：
LSC2; SELFE; Ocean and lake circulation; USA; Great Lakes; Taiwan; TAIWAN STRAIT; OCEAN; CIRCULATION; FORMULATION; TOPOGRAPHY; PREDICTION; VOLUME;
D O I：
10.1016/j.ocemod.2014.10.003
中图分类号：
P4 [大气科学（气象学）];
学科分类号：
0706 ; 070601 ;
摘要：
We present a new vertical coordinate system for cross-scale applications. Dubbed LSC2 (Localized Sigma Coordinates with Shaved Cell), the new system allows each node of the grid to have its own vertical grid, while still maintaining reasonable smoothness across horizontal and vertical dimensions. Furthermore, the staircase created by the mismatch of vertical levels at adjacent nodes is eliminated with a simple shaved-cell like approach using the concept of degenerate prisms. The new system is demonstrated to have the benefits of both terrain-following and Z-coordinate systems, while minimizing their adverse effects. We implement LSC2 in a 3D unstructured-grid model (SELFE) and demonstrate its superior performance with test cases on lake and ocean stratification. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：16 / 31
页数：16
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