DOI: 10.1002/2015GL064466
论文题名: Acoustic source inversion to estimate volume flux from volcanic explosions
作者: Kim K. ; Fee D. ; Yokoo A. ; Lees J.M.
刊名: Geophysical Research Letters
ISSN: 0094-9479
EISSN: 1944-9210
出版年: 2015
卷: 42, 期: 13 起始页码: 5243
结束页码: 5249
语种: 英语
英文关键词: FDTD modeling
; infrasound
; volcanology
; waveform inversion
Scopus关键词: Acoustics
; Finite difference time domain method
; Geometry
; Green's function
; Nuclear explosions
; Numerical methods
; Parameter estimation
; Waveform analysis
; Critical constraints
; FDTD model
; Infrasound
; Inversion techniques
; Volcanic explosions
; Volcanic topographies
; Volcanology
; Waveform inversion
; Volcanoes
; acoustic survey
; explosion
; Green function
; numerical model
; volcanic eruption
; volume change
; waveform analysis
; Japan
; Kagoshima [Kyushu]
; Kyushu
; Sakurajima
英文摘要: We present an acoustic waveform inversion technique for infrasound data to estimate volume fluxes from volcanic eruptions. Previous inversion techniques have been limited by the use of a 1-D Green's function in a free space or half space, which depends only on the source-receiver distance and neglects volcanic topography. Our method exploits full 3-D Green's functions computed by a numerical method that takes into account realistic topographic scattering. We apply this method to vulcanian eruptions at Sakurajima Volcano, Japan. Our inversion results produce excellent waveform fits to field observations and demonstrate that full 3-D Green's functions are necessary for accurate volume flux inversion. Conventional inversions without consideration of topographic propagation effects may lead to large errors in the source parameter estimate. The presented inversion technique will substantially improve the accuracy of eruption source parameter estimation (cf. mass eruption rate) during volcanic eruptions and provide critical constraints for volcanic eruption dynamics and ash dispersal forecasting for aviation safety. Application of this approach to chemical and nuclear explosions will also provide valuable source information (e.g., the amount of energy released) previously unavailable. Key Points First waveform inversion of volcano infrasound using a 3-D Green's function Strong topographic scattering must be considered for source inversion The method substantially improves the accuracy of eruption source parameter estimation. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938208763&doi=10.1002%2f2015GL064466&partnerID=40&md5=22b4c485a62dc4ae59adeb124ad9ed27
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9094
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Wilson Infrasound Observatory, Alaska Volcano Observatory, Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AL, United States
Recommended Citation:
Kim K.,Fee D.,Yokoo A.,et al. Acoustic source inversion to estimate volume flux from volcanic explosions[J]. Geophysical Research Letters,2015-01-01,42(13).