GSTDTAP  > 气候变化
DOI10.1002/2017JD027440
Gravity Wave Dynamics in a Mesospheric Inversion Layer: 1. Reflection, Trapping, and Instability Dynamics
Fritts, David C.1; Laughman, Brian1; Wang, Ling1; Lund, Thomas S.2; Collins, Richard L.3
2018-01-27
发表期刊JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
ISSN2169-897X
EISSN2169-8996
出版年2018
卷号123期号:2页码:626-648
文章类型Article
语种英语
国家USA
英文摘要

An anelastic numerical model is employed to explore the dynamics of gravity waves (GWs) encountering a mesosphere inversion layer (MIL) having a moderate static stability enhancement and a layer of weaker static stability above. Instabilities occur within the MIL when the GW amplitude approaches that required for GW breaking due to compression of the vertical wavelength accompanying the increasing static stability. Thus, MILs can cause large-amplitude GWs to yield instabilities and turbulence below the altitude where they would otherwise arise. Smaller-amplitude GWs encountering a MIL do not lead to instability and turbulence but do exhibit partial reflection and transmission, and the transmission is a smaller fraction of the incident GW when instabilities and turbulence arise within the MIL. Additionally, greater GW transmission occurs for weaker MILs and for GWs having larger vertical wavelengths relative to the MIL depth and for lower GW intrinsic frequencies. These results imply similar dynamics for inversions due to other sources, including the tropopause inversion layer, the high stability capping the polar summer mesopause, and lower frequency GWs or tides having sufficient amplitudes to yield significant variations in stability at large and small vertical scales. MILs also imply much stronger reflections and less coherent GW propagation in environments having significant fine structure in the stability and velocity fields than in environments that are smoothly varying.


英文关键词gravity wave dynamics mesospheric inversion layers gravity wave reflection and transmission gravity wave instabilities
领域气候变化
收录类别SCI-E
WOS记录号WOS:000425520200001
WOS关键词RAYLEIGH LIDAR OBSERVATIONS ; TEMPERATURE INVERSIONS ; ENERGY-DISSIPATION ; LOWER ATMOSPHERE ; FINE-STRUCTURE ; PART II ; CONVECTIVE ADJUSTMENT ; LOWER THERMOSPHERE ; LOWER STRATOSPHERE ; MIDDLE ATMOSPHERE
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/32709
专题气候变化
作者单位1.GATS Inc, Boulder, CO 80301 USA;
2.NorthWest Res Associates, Boulder, CO USA;
3.Univ Alaska Fairbanks, Inst Geophys, Fairbanks, AK 99775 USA
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GB/T 7714
Fritts, David C.,Laughman, Brian,Wang, Ling,et al. Gravity Wave Dynamics in a Mesospheric Inversion Layer: 1. Reflection, Trapping, and Instability Dynamics[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(2):626-648.
APA Fritts, David C.,Laughman, Brian,Wang, Ling,Lund, Thomas S.,&Collins, Richard L..(2018).Gravity Wave Dynamics in a Mesospheric Inversion Layer: 1. Reflection, Trapping, and Instability Dynamics.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(2),626-648.
MLA Fritts, David C.,et al."Gravity Wave Dynamics in a Mesospheric Inversion Layer: 1. Reflection, Trapping, and Instability Dynamics".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.2(2018):626-648.
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