DOI: 10.1029/2012JD018077
论文题名: A method for specifying atmospheric gravity wavefields for long-range infrasound propagation calculations
作者: Drob D.P. ; Broutman D. ; Hedlin M.A. ; Winslow N.W. ; Gibson R.G.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 10 起始页码: 3933
结束页码: 3943
语种: 英语
Scopus关键词: Climate models
; Computer simulation
; Gravity waves
; Stochastic models
; Weather forecasting
; Atmospheric gravity waves
; Infrasound signals
; Internal gravity waves
; Numerical weather prediction
; Propagation calculation
; Seismic networks
; Waveform amplitudes
; Western United States
; Acoustic wave propagation
; amplitude
; climate modeling
; gravity field
; gravity wave
; infrasonics
; internal wave
; long range transport
; noise
; numerical model
; seismic wave
; three-dimensional modeling
; travel time
; waveform analysis
; weather forecasting
; United States
英文摘要: Two important challenges in infrasound propagation physics are (1) to explain frequently observed infrasound signals in the classical near-field shadow zones and (2) to accurately predict observed waveform amplitude and signal duration. For these problems, the role that small-scale internal atmospheric gravity wave fluctuations play has recently been realized. This paper provides a methodology for representing small-scale internal gravity wave fluctuations which is suitable for infrasound propagation calculations. Adapted from the numerical weather prediction and climate modeling communities, the resulting stochastic gravity wave noise field model is three-dimensional, time dependent, and self-consistent with the atmospheric background state. To illustrate the methodology the resultant gravity wavefields are applied to ray-trace simulations of observed infrasound travel times for a dense seismic network in the Western United States which recorded infrasound signals from a large surface explosion. ©2012. 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/63786
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: Geospace Science and Technology Branch, Space Science Division, Naval Research Laboratory, Washington, DC, United States; Computational Physics, Inc., Springfield, VA, United States; Scripps Institution of Oceanography, University of California San Diego, San Diego, CA, United States; Raytheon BBN Technologies, Arlington VA, United States
Recommended Citation:
Drob D.P.,Broutman D.,Hedlin M.A.,et al. A method for specifying atmospheric gravity wavefields for long-range infrasound propagation calculations[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(10)