DOI: 10.1002/jgrd.50372
论文题名: Gravity wave generation by convection and momentum deposition in the mesosphere-lower thermosphere
作者: Vincent R.A. ; Alexander M.J. ; Dolman B.K. ; MacKinnon A.D. ; May P.T. ; Kovalam S. ; Reid I.M.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 12 起始页码: 6233
结束页码: 6245
语种: 英语
英文关键词: convection
; gravity waves
; mesosphere-lower thermosphere
; momentum fluxes
; ray tracing
Scopus关键词: Deposition
; Gravity waves
; Heat convection
; Latent heat
; Momentum
; Radar
; Ray tracing
; Storms
; Tropics
; Wave energy conversion
; Wave propagation
; Geographic variation
; High-resolution numerical models
; Mesoscale Convective System
; Mesosphere-lower thermospheres
; Momentum flux
; Ray-tracing technique
; Spatial and temporal variability
; Wave generation and propagation
; Gravitation
; atmospheric convection
; atmospheric deposition
; computer simulation
; gravity wave
; mesosphere
; momentum
; radar
; stratosphere
; thermosphere
; wave generation
; wave propagation
; Australia
英文摘要: The Tropical Warm Pool International Cloud Experiment campaign centered on Darwin (12°S, 131°E) in northern Australia in January-February 2006 provided an opportunity to study gravity wave generation by convection and the associated wave propagation and momentum transport. In this study, we discuss wave generation by a single mesoscale convective system (MCS) that occurred on 23 January. The project used a variety of radars to study the spatial and temporal variability of rainfall and the associated latent heat release during the storm. A high-resolution numerical model utilized the latent heat release derived from radar rainfall measurements to compute the spatial and geographic variation of gravity wave generation and propagation into the lower stratosphere. Gravity wave ray-tracing techniques were then used to estimate the wave energy flux penetrating to heights near 90 km, where the results were compared with direct measurements made with a meteor wind radar. This comparison is used to calibrate the momentum fluxes derived from the model and the ray-tracing results using an iterative technique. The momentum was deposited in a relatively compact region. Body forces computed from the flux divergences had their maximum values at heights near 98 km with a peak values of about 400 m s-1h-1. The effects of secondary gravity wave generation are discussed, as is the overall contribution of gravity waves generated by MCSs to the momentum budget of the tropical middle atmosphere. Key Points Gravity wave fluxes computed from radar observations of tropical storm GW fluxes in MLT calibrated by radar observations and momentum fluxes derived Momentum flux deposition resulted in large localized body forces in MLT © 2013. American Geophysical Union. All Rights Reserved. 资助项目: DP0558361
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63598
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: School of Chemistry and Physics, University of Adelaide, Adelaide, SA 5005, Australia; NorthWest Research Associates, Inc., Boulder, CO, United States; ATRAD, Adelaide, SA, Australia; Centre for Australian Weather and Climate Research (CAWCR), Melbourne, VIC, Australia
Recommended Citation:
Vincent R.A.,Alexander M.J.,Dolman B.K.,et al. Gravity wave generation by convection and momentum deposition in the mesosphere-lower thermosphere[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(12)