Local Infrasound Variability Related to In Situ Atmospheric Observation
Local Infrasound Variability Related to In Situ Atmospheric Observation
复制标题
与原位大气观测相关的局地次声变化
DOI：
10.1002/2018gl077124
复制
发表时间：
2018
影响因子：
5.2
通讯作者：
D. Seastrand
中科院分区：
文献类型：
--
作者：
Keehoon Kim;A. Rodgers;D. Seastrand
局部次声被广泛用于约束近地表事件的源参数（例如，化学爆炸和火山爆发）。虽然大气条件是关键的次声传播和源参数反演，当地的大气变化往往被忽略，假设均匀的大气，和他们的影响源反演的不确定性从来没有考虑到由于缺乏定量的了解次声的变化。我们研究了大气对局部次声传播的影响，重复爆炸实验与密集的声学网络和现场大气测量。我们使用当地大气数据和数值天气预报模型进行全三维波形模拟，以量化与大气相关的次声变化，并解决当地天气数据/数值天气模型用于声音传播模拟的优势和限制。随机大气模式的数值模拟也显示了不可忽视的影响，大气非均匀性的次声振幅，表明当地的湍流的重要作用。
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：
10.1016/j.jvolgeores.2014.10.001
发表时间：
2014-11
影响因子：
2.9
作者：
A. Dabrowa;D. N. Green;Jeffrey B. Johnson;J. Phillips;A. Rust
通讯作者：
A. Dabrowa;D. N. Green;Jeffrey B. Johnson;J. Phillips;A. Rust