随机GM + E闭包:随机后向散射与Gent和McWilliams参数化耦合的框架

IF 4.4 2区 地球科学 Q1 METEOROLOGY & ATMOSPHERIC SCIENCES
I. Grooms, N. Agarwal, G. Marques, P. J. Pegion, H. Yassin
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引用次数: 0

摘要

海洋环流模式(ogcm)通常用于水平分辨率,排除了中尺度涡旋的出现。海洋中尺度是海洋变率的重要组成部分,分辨率太粗而不能代表中尺度的ogcm必然缺乏这种变率。除了变化之外,海洋中尺度还会引起更大尺度的变率,这些变率可以在粗网格上得到解决,但粗ogcm通常也缺乏这种变率。本文开发了一种随机参数化方法,该方法在OGCM的横向速度场中增加了小的增量,从而激发了模型中的自然变率模式。这些速度增量为流动增加能量的速率与根特-麦克威廉姆斯参数化(一种流行的关于中尺度涡流对示踪剂传输影响的参数化)从分解尺度中去除势能的速率有关。随机参数化是在一个非旋转OGCM中实现的,它被证明可以显著增加可变性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The Stochastic GM + E Closure: A Framework for Coupling Stochastic Backscatter With the Gent and McWilliams Parameterization

Ocean general circulation models (OGCMs) are often used at horizontal resolutions that preclude the appearance of mesoscale eddies. The ocean mesoscale constitutes a significant component of ocean variability, and OGCMs whose resolutions are too coarse to represent the mesoscale are necessarily lacking this variability. In addition to being variable, the ocean mesoscale also induces variability on larger scales that could be resolved on a coarse grid, but coarse OGCMs often lack this variability too. This paper develops a stochastic parameterization that adds small increments to an OGCM's lateral velocity field, which excites natural modes of variability in the model. The rate at which these velocity increments add energy to the flow is tied to the rate at which the Gent-McWilliams parameterization—a popular parameterization of the effect of mesoscale eddies on tracer transport—removes potential energy from the resolved scales. The stochastic parameterization is implemented in a non-eddying OGCM, where it is shown to increase the variability significantly.

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来源期刊
Journal of Advances in Modeling Earth Systems
Journal of Advances in Modeling Earth Systems METEOROLOGY & ATMOSPHERIC SCIENCES-
CiteScore
11.40
自引率
11.80%
发文量
241
审稿时长
>12 weeks
期刊介绍: The Journal of Advances in Modeling Earth Systems (JAMES) is committed to advancing the science of Earth systems modeling by offering high-quality scientific research through online availability and open access licensing. JAMES invites authors and readers from the international Earth systems modeling community. Open access. Articles are available free of charge for everyone with Internet access to view and download. Formal peer review. Supplemental material, such as code samples, images, and visualizations, is published at no additional charge. No additional charge for color figures. Modest page charges to cover production costs. Articles published in high-quality full text PDF, HTML, and XML. Internal and external reference linking, DOI registration, and forward linking via CrossRef.
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