Parameterization of Frontal Symmetric Instabilities. I: Theory for Resolved Fronts

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• 作者：S.D. Bachman ; ^a ; ^{sb965@cam.ac.uk} ; B. Fox-Kemper^b ; J.R. Taylor^a ; L.N. Thomas^c
• 关键词：Symmetric instability ; Front ; Submesoscale ; Geostrophic shear production ; Parameterization ; Mixed layer
• 刊名：Ocean Modelling
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：109
• 期：Complete
• 页码：72-95
• 全文大小：2329 K
• 卷排序：109

文摘

A new parameterization for forced symmetric instability (SI) is developed. A vertical viscosity is specified using results from SI-resolving LES, which reduces the geostrophic shear. A bulk-PV criterion is used to specify the boundary layer depth. Dimensional analysis and a rotation tensor are used to specify along-isopycnal mixing coefficients. The parameterized fluxes compare favorably to KPP in conditions ripe for the development of SI.