DOI: 10.1002/jgrd.50398
论文题名: Overview of the 2009 and 2011 Sayarim Infrasound Calibration Experiments
作者: Fee D. ; Waxler R. ; Assink J. ; Gitterman Y. ; Given J. ; Coyne J. ; Mialle P. ; Garces M. ; Drob D. ; Kleinert D. ; Hofstetter R. ; Grenard P.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 12 起始页码: 6122
结束页码: 6143
语种: 英语
英文关键词: acoustic propagation
; ctbto
; explosion
; infrasound
Scopus关键词: Acoustic wave propagation
; Calibration
; Complex networks
; Detonation
; Explosions
; International cooperation
; Specifications
; Troposphere
; Upper atmosphere
; Wave transmission
; Wind
; Acoustic propagation
; Atmosphere attenuation
; Calibration experiments
; ctbto
; Infrasound
; Infrasound calibrations
; International collaborations
; International monitoring systems
; Experiments
; array
; calibration
; data set
; experimental study
; explosion
; frequency analysis
; numerical model
; qualitative analysis
; stratosphere
; Israel
英文摘要: Three large-scale infrasound calibration experiments were conducted in 2009 and 2011 to test the International Monitoring System (IMS) infrasound network and provide ground truth data for infrasound propagation studies. Here we provide an overview of the deployment, detonation, atmospheric specifications, infrasound array observations, and propagation modeling for the experiments. The experiments at the Sayarim Military Range, Israel, had equivalent TNT yields of 96.0, 7.4, and 76.8 t of explosives on 26 August 2009, 24 January 2011, and 26 January 2011, respectively. Successful international collaboration resulted in the deployment of numerous portable infrasound arrays in the region to supplement the IMS network and increase station density. Infrasound from the detonations is detected out to ~3500 km to the northwest in 2009 and ~6300 km to the northeast in 2011, reflecting the highly anisotropic nature of long-range infrasound propagation. For 2009, the moderately strong stratospheric wind jet results in a well-predicted set of arrivals at numerous arrays to the west-northwest. A second set of arrivals is also apparent, with low celerities and high frequencies. These arrivals are not predicted by the propagation modeling and result from unresolved atmospheric features. Strong eastward tropospheric winds (up to ~70 m/s) in 2011 produce high-amplitude tropospheric arrivals recorded out to >1000 km to the east. Significant eastward stratospheric winds (up to ~80 m/s) in 2011 generate numerous stratospheric arrivals and permit the long-range detection (i.e., >1000 km). No detections are made in directions opposite the tropospheric and stratospheric wind jets for any of the explosions. Comparison of predicted transmission loss and observed infrasound arrivals gives qualitative agreement. Propagation modeling for the 2011 experiments predicts lower transmission loss in the direction of the downwind propagation compared to the 2009 experiment, consistent with the greater detection distance. Observations also suggest a more northerly component to the stratospheric winds for the 2009 experiment and less upper atmosphere attenuation. The Sayarim infrasound calibration experiments clearly demonstrate the complexity and variability of the atmosphere, and underscore the utility of large-scale calibration experiments with dense networks for better understanding infrasound propagation and detection. Additionally, they provide a rich data set for future scientific research. Key Points Three large ground-truth infrasound experiments were conducted in 2009 and 2011 Strong wind jets permitted long range detection Atmospheric specifications sufficient for qualitative propagation modeling © 2013. American Geophysical Union. All Rights Reserved.
资助项目: AGS-1131976
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63613
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: Wilson Infrasound Observatories, Geophysical Institute, University of Alaska, Fairbanks, AK, United States; National Center for Physical Acoustics, University of Mississippi, University, MS, United States; Seismology Division, Geophysical Institute of Israel, P.O.B. 182, Lod 71100, Israel; International Data Centre, CTBTO, Vienna, Austria; Infrasound Lab, HIGP, University of Hawaii at Manoa, Manoa, HI, United States; Upper Atmospheric Modeling Section, Naval Research Laboratory, Washington, DC, United States; International Monitoring System Division, CTBTO, Vienna, Austria
Recommended Citation:
Fee D.,Waxler R.,Assink J.,et al. Overview of the 2009 and 2011 Sayarim Infrasound Calibration Experiments[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(12)