DOI: 10.1002/2017MS001099
Scopus记录号: 2-s2.0-85034099811
论文题名: Ocean Modeling on a Mesh With Resolution Following the Local Rossby Radius
作者: Sein D ; V ; , Koldunov N ; V ; , Danilov S ; , Wang Q ; , Sidorenko D ; , Fast I ; , Rackow T ; , Cabos W ; , Jung T
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2017
卷: 9, 期: 7 起始页码: 2601
结束页码: 2614
语种: 英语
英文关键词: Degrees of freedom (mechanics)
; Mesh generation
; Motion compensation
; Oceanography
; FESOM
; Finite-element ocean models
; Horizontal resolution
; Number of degrees of freedom
; Ocean eddies
; Ocean model
; Rossby radius
; Subtropical latitudes
; Finite element method
; design method
; eddy
; modeling
; numerical model
; sea surface temperature
; subtropical region
; Atlantic Ocean
; Atlantic Ocean (North)
; Atlantic Ocean (Northwest)
英文摘要: We discuss the performance of the Finite Element Ocean Model (FESOM) on locally eddy-resolving global unstructured meshes. In particular, the utility of the mesh design approach whereby mesh horizontal resolution is varied as half the Rossby radius in most of the model domain is explored. Model simulations on such a mesh (FESOM-XR) are compared with FESOM simulations on a smaller-size mesh, where refinement depends only on the pattern of observed variability (FESOM-HR). We also compare FESOM results to a simulation of the ocean model of the Max Planck Institute for Meteorology (MPIOM) on a tripolar regular grid with refinement toward the poles, which uses a number of degrees of freedom similar to FESOM-XR. The mesh design strategy, which relies on the Rossby radius and/or the observed variability pattern, tends to coarsen the resolution in tropical and partly subtropical latitudes compared to the regular MPIOM grid. Excessive variations of mesh resolution are found to affect the performance in other nearby areas, presumably through dissipation that increases if resolution is coarsened. The largest improvement shown by FESOM-XR is a reduction of the surface temperature bias in the so-called North-West corner of the North Atlantic Ocean where horizontal resolution was increased dramatically. However, other biases in FESOM-XR remain largely unchanged compared to FESOM-HR. We conclude that resolving the Rossby radius alone (with two points per Rossby radius) is insufficient, and that careful use of a priori information on eddy dynamics is required to exploit the full potential of ocean models on unstructured meshes. © 2017. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75705
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany; P. P. Shirshov Institute of Oceanology RAS, St. Petersburg, Russian Federation; MARUM—Center for Marine Environmental Sciences, Bremen, Germany; A. M. Obukhov Institute of Atmospheric Physics RAS, Moscow, Russian Federation; Department of Mathematics and Logistics, Jacobs University, Bremen, Germany; DKRZ, German Climate Computing Centre, Hamburg, Germany; Department of Physics and Mathematics, University of Alcala, Alcala, Spain; Institute of Environmental Physics, University of Bremen, Bremen, Germany
Recommended Citation:
Sein D,V,, Koldunov N,et al. Ocean Modeling on a Mesh With Resolution Following the Local Rossby Radius[J]. Journal of Advances in Modeling Earth Systems,2017-01-01,9(7)