Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017JD027442 |
Gravity Wave Dynamics in a Mesospheric Inversion Layer: 2. Instabilities, Turbulence, Fluxes, and Mixing | |
Fritts, David C.1; Wang, Ling1; Laughman, Brian1; Lund, Thomas S.2; Collins, Richard L.3 | |
2018-01-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:2页码:649-670 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | A companion paper by Fritts, Laughman, et al. (2017) employed an anelastic numerical model to explore the dynamics of gravity waves (GWs) encountering a mesospheric inversion layer (MIL) having a moderate static stability enhancement and a layer of weaker static stability above. That study revealed that MIL responses, including GW transmission, reflection, and instabilities, are sensitive functions of GW parameters. This paper expands on two of the Fritts, Laughman, et al. (2017) simulations to examine GW instability dynamics and turbulence in the MIL; forcing of the mean wind and stability environments by GW, instability, and turbulence fluxes; and associated heat and momentum transports. These direct numerical simulations resolve turbulence inertial-range scales and yield the following results:GW breaking and turbulence in the MIL occur below where they would otherwise, due to enhancements of GW amplitudes and shears in the MIL. 2-D GW and instability heat and momentum fluxes are 20-30 times larger than 3-D instability and turbulence fluxes. Mean fields are driven largely by 2-D GW and instability dynamics rather than 3-D instabilities and turbulence. 2-D and 3-D heat fluxes in regions of strong turbulence yield small departures from initial T(z) and N-2(z) profiles, hence do not yield nearly adiabatic mixed layers. Our MIL results are consistent with the relation between the turbulent vertical velocity variance and energy dissipation rate proposed by Weinstock (1981) for the limited intervals evaluated. |
英文关键词 | gravity waves mesospheric inversion layers gravity wave instability dynamics gravity wave heat and momentum fluxes turbulence and mixing |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000425520200002 |
WOS关键词 | EDDY DIFFUSION-COEFFICIENTS ; LOWER THERMOSPHERE ; MIDDLE ATMOSPHERE ; ENERGY-DISSIPATION ; VORTICITY DYNAMICS ; MOMENTUM TRANSPORT ; INTERNAL WAVES ; BREAKING ; EVOLUTION ; MODEL |
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/34100 |
专题 | 气候变化 |
作者单位 | 1.GATS Inc, Boulder, CO 80301 USA; 2.NorthWest Res Associates, Colorado Res Associates Div, Boulder, CO USA; 3.Univ Alaska, Inst Geophys, Fairbanks, AK USA |
推荐引用方式 GB/T 7714 | Fritts, David C.,Wang, Ling,Laughman, Brian,et al. Gravity Wave Dynamics in a Mesospheric Inversion Layer: 2. Instabilities, Turbulence, Fluxes, and Mixing[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(2):649-670. |
APA | Fritts, David C.,Wang, Ling,Laughman, Brian,Lund, Thomas S.,&Collins, Richard L..(2018).Gravity Wave Dynamics in a Mesospheric Inversion Layer: 2. Instabilities, Turbulence, Fluxes, and Mixing.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(2),649-670. |
MLA | Fritts, David C.,et al."Gravity Wave Dynamics in a Mesospheric Inversion Layer: 2. Instabilities, Turbulence, Fluxes, and Mixing".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.2(2018):649-670. |
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