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DOI | 10.1175/JAS-D-17-0330.1 |
On the Local View of Atmospheric Available Potential Energy | |
Novak, Lenka; Tailleux, Remi | |
2018-06-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2018 |
卷号 | 75期号:6页码:1891-1907 |
文章类型 | Article |
语种 | 英语 |
国家 | England |
英文摘要 | The possibility of constructing Lorenz's concept of available potential energy (APE) from a local principle has been known for some time, but it has received very little attention so far. Yet the local APE density framework offers the advantage of providing a positive-definite local form of potential energy, which, like kinetic energy, can be transported, converted, and created or dissipated locally. In contrast to Lorenz's definition, which relies on the exact from of potential energy, the local APE density theory uses the particular form of potential energy appropriate to the approximations considered. In this paper, this idea is illustrated for the dry hydrostatic primitive equations, whose relevant form of potential energy is the specific enthalpy. The local APE density is nonquadratic in general but can nevertheless be partitioned exactly into mean and eddy components regardless of the Reynolds averaging operator used. This paper introduces a new form of the local APE density that is easily computable from atmospheric datasets. The advantages of using the local APE density over the classical Lorenz APE are highlighted. The paper also presents the first calculation of the three-dimensional local APE density in observation-based atmospheric data. Finally, it illustrates how the eddy and mean components of the local APE density can be used to study regional and temporal variability in the large-scale circulation. It is revealed that advection from high latitudes is necessary to supply APE into the storm-track regions, and that Greenland and the Ross Sea, which have suffered from rapid land ice and sea ice loss in recent decades, are particularly susceptible to APE variability. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000434942300008 |
WOS关键词 | GENERAL-CIRCULATION ; STORM-TRACKS ; ENERGETICS ; EXERGY ; DENSITY ; SYSTEMS ; FLUID ; CYCLE ; SEA |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/29635 |
专题 | 地球科学 |
作者单位 | Univ Reading, Dept Meteorol, Reading, Berks, England |
推荐引用方式 GB/T 7714 | Novak, Lenka,Tailleux, Remi. On the Local View of Atmospheric Available Potential Energy[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2018,75(6):1891-1907. |
APA | Novak, Lenka,&Tailleux, Remi.(2018).On the Local View of Atmospheric Available Potential Energy.JOURNAL OF THE ATMOSPHERIC SCIENCES,75(6),1891-1907. |
MLA | Novak, Lenka,et al."On the Local View of Atmospheric Available Potential Energy".JOURNAL OF THE ATMOSPHERIC SCIENCES 75.6(2018):1891-1907. |
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