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Comprehensive Study of the Climatology of the Quasi-6-Day Wave in the MLT Region Based on Aura/MLS Observations and SD-WACCM-X Simulations

文献类型：期刊论文

作者Qin, Yusong2; Gu, Sheng-Yang2; Teng, Chen-Ke-Min2; Dou, Xian-Kang2; Yu, You1; Li, Na3
刊名JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
出版日期2021
卷号126期号:1页码:19
关键词Aura MLS Observation MLT Region Quasi‐ 6‐ Day Wave SD‐ WACCM‐ X
ISSN号2169-9380
DOI10.1029/2020JA028454
英文摘要The westward quasi-6-day wave (Q6DW) with zonal wavenumber 1 is a prominent and recurrent phenomenon in the mesosphere and lower thermosphere (MLT) and has a significant impact on day-to-day ionospheric variability. Geopotential height measurements from Aura Microwave Limb Sounder and Specified Dynamics Whole Atmosphere Community Climate Model eXtended Version simulations during 2005-2019 are utilized to study the climatological variations of Q6DW. The spectral analysis clearly indicates that four typical Q6DW events occur in the MLT region before and after the two equinoxes in 1 year. The wave amplitudes in the summer hemisphere are considerably larger than the amplitudes in the winter hemisphere. The Eliassen-Palm flux diagnostics show that the wave source of the post-September equinox event is located in both hemispheres, while the sources of the other three Q6DW events are in the winter hemisphere. The diagnostic analysis results show that the climatological features of Q6DW are primarily due to the seasonal variations of the mean flow, which can determine the Q6DW critical layers, baroclinic/barotropic instability, and waveguides. Specifically, the Q6DW can be amplified in the summer hemisphere mesosphere at high latitudes during pre- and postequinox periods when the critical layers penetrate the unstable region. At the two equinoxes, the Q6DW can also propagate into the MLT region with similar amplitudes in both hemispheres due to the weak zonal mean flow but without additional amplification. At the two solstices, the Q6DW is suppressed because the critical layers envelop the whole unstable region, which prevents its amplification through wave-mean flow interaction.
资助项目National Natural Science Foundation of China[41704153] ; National Natural Science Foundation of China[41874181] ; National Natural Science Foundation of China[41831071]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000631963300033
出版者AMER GEOPHYSICAL UNION
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/101012]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Gu, Sheng-Yang
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China
2.Wuhan Univ, Elect Informat Sch, Wuhan, Peoples R China
3.China Res Inst Radiowave Propagat, Natl Key Lab Electromagnet Environm, Qingdao, Shandong, Peoples R China
推荐引用方式
GB/T 7714		 Qin, Yusong,Gu, Sheng-Yang,Teng, Chen-Ke-Min,et al. Comprehensive Study of the Climatology of the Quasi-6-Day Wave in the MLT Region Based on Aura/MLS Observations and SD-WACCM-X Simulations[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2021,126(1):19.
APA Qin, Yusong,Gu, Sheng-Yang,Teng, Chen-Ke-Min,Dou, Xian-Kang,Yu, You,&Li, Na.(2021).Comprehensive Study of the Climatology of the Quasi-6-Day Wave in the MLT Region Based on Aura/MLS Observations and SD-WACCM-X Simulations.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,126(1),19.
MLA Qin, Yusong,et al."Comprehensive Study of the Climatology of the Quasi-6-Day Wave in the MLT Region Based on Aura/MLS Observations and SD-WACCM-X Simulations".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 126.1(2021):19.

入库方式： OAI收割

来源：地质与地球物理研究所

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