The Atmospheric Boundary Layer and the "Gray Zone" of Turbulence: A Critical Review
The Atmospheric Boundary Layer and the "Gray Zone" of Turbulence: A Critical Review
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DOI：
10.1029/2019jd030317
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发表时间：
2020-07-16
影响因子：
4.4
通讯作者：
Zhou, Bowen
中科院分区：
文献类型：
--
作者：
Honnert, Rachel;Efstathiou, Georgios A.;Zhou, Bowen
最近计算能力的提高意味着用于数值天气预报的大气模型现在能够在几百米量级的网格间距下运行，与大气边界层中占主导地位的湍流长度尺度相当。因此，模型开始部分解决边界层中的相干翻转结构。在这种分辨率范围内，即所谓的边界层“灰色地带”，无论是高分辨率大气建模技术（几十米分辨率）还是传统气象模型（几公里分辨率）都不合适，因为参数化背后的基本假设被违反了。尽管如此，在这一制度下的模型模拟可能仍然非常有用。在本文中，一个新形成的灰区边界层社区奠定了灰区湍流参数化的基础，确定了高分辨率大气建模的挑战，并提出了不同的灰区边界层模型。我们讨论了成功的应用程序和当前参数化方法的局限性，并考虑各种问题，在扩展有前途的研究方法用于数值天气预报。研究的最终目标是发展适用于所有尺度的统一边界层参数化。
Recent increases in computing power mean that atmospheric models for numerical weather prediction are now able to operate at grid spacings of the order of a few hundred meters, comparable to the dominant turbulence length scales in the atmospheric boundary layer. As a result, models are starting to partially resolve the coherent overturning structures in the boundary layer. In this resolution regime, the so-called boundary layer "gray zone," neither the techniques of high-resolution atmospheric modeling (a few tens of meters resolution) nor those of traditional meteorological models (a few kilometers resolution) are appropriate because fundamental assumptions behind the parameterizations are violated. Nonetheless, model simulations in this regime may remain highly useful. In this paper, a newly formed gray zone boundary layer community lays the basis for parameterizing gray zone turbulence, identifies the challenges in high-resolution atmospheric modeling and presents different gray zone boundary layer models. We discuss both the successful applications and the limitations of current parameterization approaches, and consider various issues in extending promising research approaches into use for numerical weather prediction. The ultimate goal of the research is the development of unified boundary layer parameterizations valid across all scales.