Evaluating two numerical advection schemes in HYCOM for eddy-resolving modelling of the Agulhas Current
作者: Backeberg B. C.Bertino L.Johannessen J. A.
作者单位: 1Department of Oceanography, University of Cape Town, South Africa
2Mohn-Sverdrup Center for Global Ocean Studies and Operational Oceanography, Norway
3Nansen Environmental and Remote Sensing Center, Norway
4Geophysical Institute, University of Bergen, Norway
刊名: Ocean Science, 2009, Vol.5 (20), pp.173-190
来源数据库: Copernicus Journal
DOI: 10.5194/os-5-173-2009
原始语种摘要: A 4th order advection scheme is applied in a nested eddy-resolving HybridCoordinate Ocean Model (HYCOM) of the greater Agulhas Current system for thepurpose of testing advanced numerics as a means for improving the modelsimulation for eventual operational implementation. Model validationtechniques comparing sea surface height variations, sea level skewness andvariogram analyses to satellite altimetry measurements quantify thatgenerally the 4th order advection scheme improves the realism of the modelsimulation. The most striking improvement over the standard 2nd ordermomentum advection scheme, is that the southern Agulhas Current is simulatedas a well-defined meandering current, rather than a train of successiveeddies. A better vertical structure and stronger poleward transports in...
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关键词翻译
关键词翻译
  • advection 平流
  • scheme 略图
  • resolving 解析过程
  • skewness 非对称性
  • eventual 可能发生的
  • southwestward 西南方向
  • meandering 弯曲化
  • improvement 改良
  • mesoscale 中等尺度
  • southern 南边的