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Global distribution and interannual variations of mesospheric and lower thermospheric neutral wind diurnal tide: 1. Migrating tide
Wu, Q.; Ortland, D. A.; Killeen, T. L.; Roble, R. G.; Hagan, M. E.; Liu, H. L.; Solomon, S. C.; Xu, J. Y.; Skinner, W. R.; Niciejewski, R. J.; 北京8701信箱
Department空间天气学国家重点实验室
Source PublicationJournal of Geophysical Research-Space Physics
2008
Volume113Issue:A5Pages:A05308
ISSN0148-0227
Language英语
KeywordTimed Doppler Interferometer Mf Radar Observations Latent-heat Release Upper-atmosphere Semidiurnal Tides Middle Atmosphere Solar Tides Mean Winds Uars Variability
AbstractUsing the TIMED Doppler interferometer (TIDI) mesospheric and lower thermospheric neutral-wind multiyear data set (2002-2007) and NCAR TIME General Circulation Models (GCM) 1.2 annual run results (2002-2005) at the TIDI sampling points, we study the migrating diurnal tide's global distribution, interannual, and seasonal variations in connection with the mean zonal wind interannual variations. A strong quasi-biennial oscillation (QBO) effect on the diurnal tide was observed in the TIDI data and reproduced to a lesser degree in the TIME-GCM run. The migrating diurnal tide amplitude is larger during the eastward phase of the stratospheric QBO and weaker during the westward phase. Westward mesospheric equatorial mean zonal winds appeared during the eastward phase of the stratospheric QBO (in 2002, 2004, and 2006). The strongest QBO effect on both the migrating diurnal tide and mean zonal winds was observed during the March equinox. The stronger tides may be related to the weaker gravity wave filtering in the stratosphere during the eastward phase stratospheric QBO. The TIDI data also exhibit large interhemispheric asymmetry. The westward mean zonal winds in the mesosphere appeared to be associated with the enhanced diurnal tide. The TIME-GCM 1.2 diurnal tide amplitudes are in general smaller than those observed by the TIDI instrument. Limited vertical spatial resolution for the TIME-CGM 1.2 is suggested as the cause. Future improvements are expected with a higher spatial resolution in the model.
Indexed BySCI
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/1099
Collection空间科学部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
Wu, Q.,Ortland, D. A.,Killeen, T. L.,et al. Global distribution and interannual variations of mesospheric and lower thermospheric neutral wind diurnal tide: 1. Migrating tide[J]. Journal of Geophysical Research-Space Physics,2008,113(A5):A05308.
APA Wu, Q..,Ortland, D. A..,Killeen, T. L..,Roble, R. G..,Hagan, M. E..,...&北京8701信箱.(2008).Global distribution and interannual variations of mesospheric and lower thermospheric neutral wind diurnal tide: 1. Migrating tide.Journal of Geophysical Research-Space Physics,113(A5),A05308.
MLA Wu, Q.,et al."Global distribution and interannual variations of mesospheric and lower thermospheric neutral wind diurnal tide: 1. Migrating tide".Journal of Geophysical Research-Space Physics 113.A5(2008):A05308.
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