DOI: 10.1002/jgrd.50623
论文题名: Latitudinal and altitudinal variability of lower atmospheric inertial gravity waves revealed by U.S. radiosonde data
作者: Zhang S.D. ; Yi F. ; Huang C.M. ; Huang K.M. ; Gan Q. ; Zhang Y.H. ; Gong Y.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 14 起始页码: 7750
结束页码: 7764
语种: 英语
英文关键词: altitudinal variation
; inertial gravity wave
; latitudinal variation
; lower atmosphere
; radiosonde
Scopus关键词: Gravity waves
; Radiosondes
; Troposphere
; Wave energy conversion
; altitudinal variation
; Background temperature
; Inertial gravity wave
; Intrinsic frequency
; Latitudinal distribution
; Latitudinal variation
; Lower atmosphere
; Radiosonde observations
; Heat flux
; altitude
; data set
; gravity wave
; heat flux
; latitude
; radiosonde
; seasonal variation
; stratosphere
; wave energy
; wavelength
; United States
英文摘要: We adopt a broad spectral data analyzing method to derive the continuous altitude variability of inertial gravity wave (GW) parameter properties in the altitude range of 2-25 km from 11 year (1998-2008) radiosonde observations over 92 United States stations locating in the latitude range from 5°N to 75°N. To our knowledge, this is the first time presenting latitudinal and continuous altitudinal variability of lower atmospheric GW parameters. The presented latitudinal distribution of GW parameters indicates that the wave energy in the troposphere and lower stratosphere peaks, respectively, at the middle and lower latitudes; and at lower latitudes, GWs usually have larger ratios of wave intrinsic frequency to Coriolis parameter, smaller intrinsic frequencies, shorter vertical wavelengths, and longer horizontal wavelengths. Our analyses also revealed continuous altitudinal variations of GW parameters, most of which are closely related to those of the background temperature and wind fields, indicating the important role of background atmosphere in excitation and propagation of GWs. Moreover, our results suggested the profound climatological impacts of GWs on background atmosphere. The GW-induced force tends to decelerate the zonal jet at middle latitudes and produces a negative vertical shear in the northward wind closely above the tropopause altitude. The GW heat flux tends to cool the atmosphere around the tropospheric jet altitude and contributes significantly to the forming of tropospheric inversions at middle latitudes. Additionally, we demonstrated that GW energy densities, momentum, and heat fluxes have evident seasonal variations, especially at middle latitudes. Key Points Revealed the continuous altitudinal variability of lower atmospheric GWs. GW parameters are closely related to background atmosphere. Revealed profound climatological impacts of GWs on background atmosphere. ©2013. American Geophysical Union. All Rights Reserved. 资助项目: 40825013
; 41174126
; 41221003
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63521
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: Electronic Information School, Wuhan University, Wuhan, Hubei 430079, China; Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan, China; State Observatory for Atmospheric Remote Sensing, Wuhan, China; College of Hydrometeorology, Nanjing University of Information Science and Technology, Nanjing, China
Recommended Citation:
Zhang S.D.,Yi F.,Huang C.M.,et al. Latitudinal and altitudinal variability of lower atmospheric inertial gravity waves revealed by U.S. radiosonde data[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(14)