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Global structure and seasonal variations of the migrating 6-h tide observed by SABER/TIMED
Liu MoHan; Xu JiYao; Yue Jia; Jiang GuoYing; Liu, MH (reprint author), Chinese Acad Sci, Ctr Space Sci & Appl Res, State Key Lab Space Weather, Beijing 100190, Peoples R China.
Department空间科学部
Source PublicationSCIENCE CHINA-EARTH SCIENCES
2015
Volume58Issue:7Pages:1216-1227
ISSN1674-7313
Language英语
KeywordMigrating Tide Global Structure Seasonal Variations Non-linear Interaction Bispectral Analysis
AbstractTen years of SABER/TIMED temperature data are used to analyze the global structure and seasonal variations of the migrating 6-h tide from the stratosphere to the lower thermosphere. The amplitudes of the migrating 6-h tide increase with altitudes. In the stratosphere, the migrating 6-h tide peaks around 35 degrees N/S. The climatologically annual mean of the migrating 6-h tide clearly shows the manifestation of the (4, 6) Hough mode between 70 and 90 km that peaks at the equator and near 35 degrees N/S. Above 90 km, the 6-h tide shows more than one Hough mode with the (4, 6) mode being the dominant one. The migrating 6-h tide is stronger in the southern hemisphere. Annual, semiannual, 4-, and 3-month oscillations are the four dominant seasonal variations of the tidal amplitude. In the stratosphere and stratopause, the spring enhancement of the 6-h tide at middle latitudes is the most conspicuous feature. From the mesosphere to the lower thermosphere, the tidal amplitude at low latitudes is gradually in the scale of that at middle latitudes and exhibits different temporal variations at different altitudes and latitudes. Both ozone heating in the stratosphere and the background atmosphere probably affect the generation and the seasonal variations of the migrating 6-h tide. In addition, the non-linear interaction between different tidal harmonics is another possible mechanism.
Indexed BySCI ; EI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/4587
Collection空间科学部
Corresponding AuthorLiu, MH (reprint author), Chinese Acad Sci, Ctr Space Sci & Appl Res, State Key Lab Space Weather, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Liu MoHan,Xu JiYao,Yue Jia,et al. Global structure and seasonal variations of the migrating 6-h tide observed by SABER/TIMED[J]. SCIENCE CHINA-EARTH SCIENCES,2015,58(7):1216-1227.
APA Liu MoHan,Xu JiYao,Yue Jia,Jiang GuoYing,&Liu, MH .(2015).Global structure and seasonal variations of the migrating 6-h tide observed by SABER/TIMED.SCIENCE CHINA-EARTH SCIENCES,58(7),1216-1227.
MLA Liu MoHan,et al."Global structure and seasonal variations of the migrating 6-h tide observed by SABER/TIMED".SCIENCE CHINA-EARTH SCIENCES 58.7(2015):1216-1227.
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