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DOI | 10.1175/JAS-D-17-0388.1 |
Evolution and Stability of Two-Dimensional Anelastic Internal Gravity Wave Packets | |
Gervais, Alain D.1; Swaters, Gordon E.1; van den Bremer, Ton S.2; Sutherland, Bruce R.3,4 | |
2018-10-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
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ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2018 |
卷号 | 75期号:10页码:3703-3724 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada; England |
英文摘要 | The weakly nonlinear evolution, stability, and overturning of horizontally and vertically localized internal gravity wave packets is examined for a nonrotating, anelastic atmosphere that is stationary in the absence of waves. The weakly nonlinear evolution is examined through the derivation of their wave-induced mean flow, which is used to formulate a nonlinear Schrodinger equation. The induced flow is manifest as a long, hydrostatic, bow wake-like disturbance, whose flow direction transitions from positive on the leading flank of the wave packet to negative on the trailing flank of the wave packet. As such, two-dimensional wave packets are always modulationally unstable. This instability results in enhanced amplitude growth confined to either the leading or trailing flank. Hence, when combined with anelastic growth predicted by linear theory, we anticipate two-dimensional waves will overturn either somewhat below or just above the heights predicted by linear theory. Numerical solutions of the Schrodinger equation are compared with the results of fully nonlinear simulations to establish the validity of the weakly nonlinear theory. Actual wave overturning heights are determined quantitatively from a range of fully nonlinear simulations. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000450965000004 |
WOS关键词 | GENERAL-CIRCULATION ; SCALE ANALYSIS ; DRAG ; FLOW ; CONVECTION ; DEEP |
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/29601 |
专题 | 地球科学 |
作者单位 | 1.Univ Alberta, Dept Math & Stat Sci, Edmonton, AB, Canada; 2.Univ Oxford, Dept Engn Sci, Oxford, England; 3.Univ Alberta, Dept Phys, Edmonton, AB, Canada; 4.Univ Alberta, Dept Earth & Atmospher Sci, Edmonton, AB, Canada |
推荐引用方式 GB/T 7714 | Gervais, Alain D.,Swaters, Gordon E.,van den Bremer, Ton S.,et al. Evolution and Stability of Two-Dimensional Anelastic Internal Gravity Wave Packets[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2018,75(10):3703-3724. |
APA | Gervais, Alain D.,Swaters, Gordon E.,van den Bremer, Ton S.,&Sutherland, Bruce R..(2018).Evolution and Stability of Two-Dimensional Anelastic Internal Gravity Wave Packets.JOURNAL OF THE ATMOSPHERIC SCIENCES,75(10),3703-3724. |
MLA | Gervais, Alain D.,et al."Evolution and Stability of Two-Dimensional Anelastic Internal Gravity Wave Packets".JOURNAL OF THE ATMOSPHERIC SCIENCES 75.10(2018):3703-3724. |
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