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Title: Local Infrasound Variability Related to In Situ Atmospheric Observation [Infrasound Variability and Predictability in the Atmospheric Boundary Layer]

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. As a result, 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]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Mission Support and Test Services, LLC, Las Vegas, NV (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (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; 893980
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Journal Article: Published Article
Journal Name:
Geophysical Research Letters
Additional Journal Information:
Journal Volume: 45; Journal Issue: 7; Journal ID: ISSN 0094-8276
Publisher:
American Geophysical Union
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 [Infrasound Variability and Predictability in the Atmospheric Boundary Layer]. United States: N. p., 2018. Web. doi:10.1002/2018GL077124.
Kim, Keehoon, Rodgers, Arthur, & Seastrand, Douglas. Local Infrasound Variability Related to In Situ Atmospheric Observation [Infrasound Variability and Predictability in the Atmospheric Boundary Layer]. United States. doi:10.1002/2018GL077124.
Kim, Keehoon, Rodgers, Arthur, and Seastrand, Douglas. Tue . "Local Infrasound Variability Related to In Situ Atmospheric Observation [Infrasound Variability and Predictability in the Atmospheric Boundary Layer]". United States. doi:10.1002/2018GL077124.
@article{osti_1432133,
title = {Local Infrasound Variability Related to In Situ Atmospheric Observation [Infrasound Variability and Predictability in the Atmospheric Boundary Layer]},
author = {Kim, Keehoon and Rodgers, Arthur and Seastrand, Douglas},
abstractNote = {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. As a result, 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 = {Tue Feb 27 00:00:00 EST 2018},
month = {Tue Feb 27 00:00:00 EST 2018}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1002/2018GL077124

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