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DOI | 10.1175/JAS-D-18-0092.1 |
Linear Stability of Moist Convecting Atmospheres. Part I: From Linear Response Functions to a Simple Model and Applications to Convectively Coupled Waves | |
Kuang, Zhiming1,2 | |
2018-09-01 | |
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:9页码:2889-2907 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | A procedure is presented to systematically construct simple models for the linear stability of moist convecting atmospheres. First, linear response functions of a cumulus ensemble constructed from cloud-system-resolving models are coupled with matrices expressing two-dimensional large-scale linear wave dynamics. For a radiative-convective equilibrium reference state, this model gives two branches of unstable modes: a propagating convectively coupled wave branch and a stationary branch related to storage of column-integrated moist static energy (MSE). The stationary branch is unstable only when radiative feedback is included, while the convectively coupled wave branch is less affected by radiative feedback. With a modular order-reduction procedure from control theory, the linear-response-function-based model is reduced to a system of six ordinary differential equations while still capturing the essential features of the unstable modes (eigenvalues and structures). The six-dimensional system is then split into a slow and a fast manifold. The slow manifold (again, reflecting column MSE storage) is essential for the stationary mode but not for the convectively coupled waves. The fast manifold is then transformed into a form similar to that of prior simple models of convectively coupled waves, thus placing those models and the insights derived from them on a firmer footing. The procedure also better quantifies the parameters of such simple models and allows the stability difference between different reference states to be better understood. |
英文关键词 | Convection Instability Large-scale motions |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000441504300001 |
WOS关键词 | EQUATORIAL WAVES ; SELF-AGGREGATION ; GRAVITY-WAVES ; STRATIFORM INSTABILITY ; TROPICAL CONVECTION ; RESOLVING MODEL ; KELVIN WAVE ; SIMULATIONS ; DISTURBANCES ; DYNAMICS |
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/29538 |
专题 | 地球科学 |
作者单位 | 1.Harvard Univ, Dept Earth & Planetary Sci, 20 Oxford St, Cambridge, MA 02138 USA; 2.Harvard Univ, Paulson Sch Engn & Appl Sci, Cambridge, MA 02138 USA |
推荐引用方式 GB/T 7714 | Kuang, Zhiming. Linear Stability of Moist Convecting Atmospheres. Part I: From Linear Response Functions to a Simple Model and Applications to Convectively Coupled Waves[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2018,75(9):2889-2907. |
APA | Kuang, Zhiming.(2018).Linear Stability of Moist Convecting Atmospheres. Part I: From Linear Response Functions to a Simple Model and Applications to Convectively Coupled Waves.JOURNAL OF THE ATMOSPHERIC SCIENCES,75(9),2889-2907. |
MLA | Kuang, Zhiming."Linear Stability of Moist Convecting Atmospheres. Part I: From Linear Response Functions to a Simple Model and Applications to Convectively Coupled Waves".JOURNAL OF THE ATMOSPHERIC SCIENCES 75.9(2018):2889-2907. |
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