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Gravity wave activity in the troposphere and lower stratosphere: An observational study of seasonal and interannual variations
Wu, Yongfu; Yuan, Wei; Xu, Jiyao; 北京8701信箱
Department空间天气学国家重点实验室
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
2013-10-16
Volume118Issue:19Pages:11352-11359
ISSN2169-8996
Language英语
KeywordGravity Waves Saturation Models Dynamical And Convective Instabilities
Other AbstractAn 11 year (1998-2008) temperature and wind data set obtained over Annette Island (55.03°N, 131.57°W) is used to examine gravity wave activity and their seasonal and interannual variations in gravity wave activity. Vertical wave number spectra of normalized temperature and wind fluctuations are calculated and are compared with the predictions of gravity wave saturation models. Results indicate that there are serious discrepancies between our measurements and earlier observational results at present stage of study of vertical wave number spectra. The correlation coefficients between tropospheric and stratospheric temperature spectral parameters are very small, suggesting that the result is in agreement with previous studies. Time series of total wave energy reveal clear seasonal and interannual variations. Maximum wave energy amplitudes occur near winter of each year in the troposphere and near summer of each year in the stratosphere. Specifically, the maximum wave energy amplitudes in the troposphere show a close correspondence with the maximum occurrence rate of dynamical instability. In addition, the maximum wave energy amplitudes in the stratosphere also show a close correspondence with the maximum occurrence rate of convective instability.
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/122/1517
Collection空间科学部
Corresponding Author北京8701信箱
AffiliationChinese Acad Sci, Ctr Space Sci & Appl Res, State Key Lab Space Weather, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Wu, Yongfu,Yuan, Wei,Xu, Jiyao,et al. Gravity wave activity in the troposphere and lower stratosphere: An observational study of seasonal and interannual variations[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2013,118(19):11352-11359.
APA Wu, Yongfu,Yuan, Wei,Xu, Jiyao,&北京8701信箱.(2013).Gravity wave activity in the troposphere and lower stratosphere: An observational study of seasonal and interannual variations.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,118(19),11352-11359.
MLA Wu, Yongfu,et al."Gravity wave activity in the troposphere and lower stratosphere: An observational study of seasonal and interannual variations".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 118.19(2013):11352-11359.
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