DOI: 10.1002/2013JD020985
论文题名: Simulations of the winter stratopause and summer mesopause at varying spatial resolutions
作者: Siskind D.E.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2014
卷: 119, 期: 2 起始页码: 461
结束页码: 470
语种: 英语
英文关键词: mesosphere
; stratosphere
Scopus关键词: Drag
; Forecasting
; Upper atmosphere
; Atmospheric prediction
; Forecast systems
; Gravity wave drag
; mesosphere
; Middle atmosphere model
; Residual temperature
; Spatial resolution
; Spectral diffusion
; Gravity waves
; gravity wave
; mesopause
; mesosphere
; parameterization
; spatial resolution
; stratosphere
; wave spectrum
英文摘要: The high-altitude analysis from the Navy Operational Global Atmospheric Prediction System-Advanced Level Physics High Altitude (NOGAPS-ALPHA) forecast/assimilation system is used to initialize a series of 10 day forecasts at different spatial resolutions without any assumed gravity wave drag parameterization. As the spatial resolution is increased from 2.25° (spectral truncation at 79 total wave numbers, T79) to 0.75° (T239) and finally, to 0.375°(T479), the model simulation progressively improves compared with the analysis. The model vertical momentum fluxes are significantly greater at T479 relative to T239, consistent with resolving a greater fraction of the gravity wave spectrum. However, even at 0.375° resolution, a residual cold bias at the winter stratopause and warm bias at the summer mesopause remain, suggesting a continuing need for parameterized gravity wave drag. In addition, the zonal mean temperature solution is sensitive to the assumed value of spectral hyperdiffusion, thus highlighting an additional parameter that must be properly tuned in high-resolution middle atmosphere models. Key Points Stratopause and mesopause simulated with a T479 forecast system. Residual temperature biases suggest continuing need for gravity wave drag. Zonal mean temperature also sensitive to spectral diffusion parameter. ©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/63067
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: Space Science Division, Naval Research Laboratory, Washington DC, United States
Recommended Citation:
Siskind D.E.. Simulations of the winter stratopause and summer mesopause at varying spatial resolutions[J]. Journal of Geophysical Research Atmospheres,2014-01-01,119(2)