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Title: Local Infrasound Variability Related to In Situ Atmospheric Observation

Abstract

Abstract Local infrasound is widely used to constrain source parameters of near‐surface events (e.g., chemical explosions and volcanic eruptions). While atmospheric conditions are critical to infrasound propagation and source parameter inversion, local atmospheric variability is often ignored by assuming homogeneous atmospheres, and their impact on the source inversion uncertainty has never been accounted for due to the lack of quantitative understanding of infrasound variability. We investigate atmospheric impacts on local infrasound propagation by repeated explosion experiments with a dense acoustic network and in situ atmospheric measurement. We perform full 3‐D waveform simulations with local atmospheric data and numerical weather forecast model to quantify atmosphere‐dependent infrasound variability and address the advantage and restriction of local weather data/numerical weather model for sound propagation simulation. Numerical simulations with stochastic atmosphere models also showed nonnegligible influence of atmospheric heterogeneity on infrasound amplitude, suggesting an important role of local turbulence.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]
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  1. Atmosphere, Earth, and Energy Division Lawrence Livermore, National Laboratory Livermore CA USA
  2. Mission Support and Test Services LLC Las Vegas NV USA
Publication Date:
Research Org.:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1432133
Alternate Identifier(s):
OSTI ID: 1432134; OSTI ID: 1466915
Report Number(s):
LLNL-JRNL-743710
Journal ID: ISSN 0094-8276
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Published Article
Journal Name:
Geophysical Research Letters
Additional Journal Information:
Journal Name: Geophysical Research Letters Journal Volume: 45 Journal Issue: 7; Journal ID: ISSN 0094-8276
Publisher:
American Geophysical Union (AGU)
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; explosion‐induced infrasound; full‐waveform modeling; finite difference method

Citation Formats

Kim, Keehoon, Rodgers, Arthur, and Seastrand, Douglas. Local Infrasound Variability Related to In Situ Atmospheric Observation. United States: N. p., 2018. Web. doi:10.1002/2018GL077124.
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Kim, Keehoon, Rodgers, Arthur, & Seastrand, Douglas. Local Infrasound Variability Related to In Situ Atmospheric Observation. United States. https://doi.org/10.1002/2018GL077124
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Kim, Keehoon, Rodgers, Arthur, and Seastrand, Douglas. Fri . "Local Infrasound Variability Related to In Situ Atmospheric Observation". United States. https://doi.org/10.1002/2018GL077124.
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@article{osti_1432133,
title = {Local Infrasound Variability Related to In Situ Atmospheric Observation},
author = {Kim, Keehoon and Rodgers, Arthur and Seastrand, Douglas},
abstractNote = {Abstract Local infrasound is widely used to constrain source parameters of near‐surface events (e.g., chemical explosions and volcanic eruptions). While atmospheric conditions are critical to infrasound propagation and source parameter inversion, local atmospheric variability is often ignored by assuming homogeneous atmospheres, and their impact on the source inversion uncertainty has never been accounted for due to the lack of quantitative understanding of infrasound variability. We investigate atmospheric impacts on local infrasound propagation by repeated explosion experiments with a dense acoustic network and in situ atmospheric measurement. We perform full 3‐D waveform simulations with local atmospheric data and numerical weather forecast model to quantify atmosphere‐dependent infrasound variability and address the advantage and restriction of local weather data/numerical weather model for sound propagation simulation. Numerical simulations with stochastic atmosphere models also showed nonnegligible influence of atmospheric heterogeneity on infrasound amplitude, suggesting an important role of local turbulence.},
doi = {10.1002/2018GL077124},
journal = {Geophysical Research Letters},
number = 7,
volume = 45,
place = {United States},
year = {Fri Apr 06 00:00:00 EDT 2018},
month = {Fri Apr 06 00:00:00 EDT 2018}
}
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https://doi.org/10.1002/2018GL077124
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