DOI: 10.1002/jgrd.50844
论文题名: Gravity wave activity in the troposphere and lower stratosphere: An observational study of seasonal and interannual variations
作者: Wu Y. ; Yuan W. ; Xu J.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 19 起始页码: 11352
结束页码: 11359
语种: 英语
英文关键词: dynamical and convective instabilities
; gravity waves
; saturation models
Scopus关键词: Troposphere
; Wave energy conversion
; Convective instabilities
; Correlation coefficient
; Dynamical instabilities
; Gravity-wave saturation
; Normalized temperature
; Saturation model
; Seasonal and interannual variations
; Stratospheric temperature
; Gravity waves
; annual variation
; atmospheric convection
; data set
; gravity wave
; observational method
; seasonal variation
; stratosphere
; time series
; troposphere
; wave action
; wave energy
; Alaska
; Alexander Archipelago
; Annette Island
; United States
英文摘要: An 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. Key Points There are serious discrepancies between observations and model expectations Study of the seasonal and interannual variations at high latitudes is meager We discuss main excitation source of the seasonal and interannual variations ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63257
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: State Key Laboratory of Space Weather, Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100190, China
Recommended Citation:
Wu Y.,Yuan W.,Xu J.. Gravity wave activity in the troposphere and lower stratosphere: An observational study of seasonal and interannual variations[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(19)