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arXiv 1807.01006math.APphysics.ao-ph
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欧拉坐标系下不可压半地转方程的局部时间物理解

Local-in-time Physical Solutions of the Incompressible Semi-Geostrophic Equations in Eulerian Coordinates

Mark Wilkinson

摘要:

本文证明了欧拉坐标下的不可压半地转方程在三维光滑有界单连通区域上的局部时间光滑解的存在性。我们的解决方案坚持卡伦的稳定性原则,在地球势是保证是一个凸映射的所有时间的存在。我们达到我们的结果呼吁所谓的div-curl系统(或霍奇系统)的理论,利用最近的结果王,产生有用的估计非地转速度场。据我们所知,这项工作构成了第一次,任何概念的有界解的半地转方程在欧拉坐标已被构造在一个有界的区域。事实上,我们的工作解决了一个悬而未决的问题,其中突出的,A。Figalli在他的CIME讲座半地转方程。我们的方法基本上是基本的。我们讨论了应用的新思想在这项工作中的情况下,可变的科里奥利力在文章的最后一节。

英文摘要:

We prove the existence of local-in-time smooth solutions of the incompressible semi-geostrophic equations expressed in Eulerian co-ordinates in 3-dimensional smooth bounded simply-connected domains. Our solutions adhere to Cullen's Stability Principle in that the geopotential is guaranteed to be a convex map for all times of its existence. We achieve our results by appealing to the theory of so-called div-curl systems (or Hodge systems), making use of recent results of Wang, which yield useful estimates on the ageostrophic velocity field. To our knowledge, this work constitutes the first time that any notion of bounded solution of the semi-geostrophic equations in Eulerian co-ordinates has been constructed on a bounded domain. Indeed, our work solves an open problem as highlighted by, among others, A. Figalli in his CIME lectures on the semi-geostrophic equations. Our methods are largely elementary. We discuss the application of the novel ideas in this work to the case of variable Coriolis force in the final section of the article.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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