Modeling the refraction of microbaroms by the winds of a large maritime storm

doi:10.1121/1.5016809

Title: Modeling the refraction of microbaroms by the winds of a large maritime storm

Article Details
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Continuous infrasonic signals produced by the ocean surface interacting with the atmosphere, termed microbaroms, are known to be generated by a number of phenomena including large maritime storms. Storm generated microbaroms exhibit axial asymmetry when observed at locations far from the storm due to the source location being offset from the storm center. Because of this offset, a portion of the microbarom energy will radiate towards the storm center and interact with the winds in the region. Detailed here are predictions for the propagation of microbaroms through an axisymmetric, three-dimensional model storm. Geometric propagation methods have been utilized and the predicted horizontal refraction is found to produce signals that appear to emanate from a virtual source near the storm center when observed far from the storm. This virtual source near the storm center is expected to be observed only from a limited arc around the storm system with increased extent associated with more intense wind fields. This result implies that identifying the extent of the arc observing signal from the virtual source could provide a means to estimate the wind structure using infrasonic observations far from the storm system.

Authors:

; Waxler, Roger ^[2]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Univ. of Mississippi, Oxford, MS (United States). National Center for Physical Acoustics

Publication Date:: 2017-12-12

Report Number(s):: LA-UR-17-26052
Journal ID: ISSN 0001-4966

Grant/Contract Number:: AC52-06NA25396

Type:: Accepted Manuscript

Journal Name:: Journal of the Acoustical Society of America

Additional Journal Information:: Journal Volume: 142; Journal Issue: 6; Journal ID: ISSN 0001-4966

Publisher:: Acoustical Society of America

Research Org:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Org:: USDOE National Nuclear Security Administration (NNSA)

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 54 ENVIRONMENTAL SCIENCES

OSTI Identifier:: 1469534


                    Blom, Philip Stephen, and Waxler, Roger. Modeling the refraction of microbaroms by the winds of a large maritime storm.  United States: N. p.,  
        Web.  doi:10.1121/1.5016809.

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                    Blom, Philip Stephen, & Waxler, Roger. Modeling the refraction of microbaroms by the winds of a large maritime storm.  United States.  doi:10.1121/1.5016809.

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                    Blom, Philip Stephen, and Waxler, Roger. 2017.  
        "Modeling the refraction of microbaroms by the winds of a large maritime storm".  United States.  
        doi:10.1121/1.5016809.  https://www.osti.gov/servlets/purl/1469534.

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@article{osti_1469534,

  title        = {Modeling the refraction of microbaroms by the winds of a large maritime storm},

  author       = {Blom, Philip Stephen and Waxler, Roger},

  abstractNote = {Continuous infrasonic signals produced by the ocean surface interacting with the atmosphere, termed microbaroms, are known to be generated by a number of phenomena including large maritime storms. Storm generated microbaroms exhibit axial asymmetry when observed at locations far from the storm due to the source location being offset from the storm center. Because of this offset, a portion of the microbarom energy will radiate towards the storm center and interact with the winds in the region. Detailed here are predictions for the propagation of microbaroms through an axisymmetric, three-dimensional model storm. Geometric propagation methods have been utilized and the predicted horizontal refraction is found to produce signals that appear to emanate from a virtual source near the storm center when observed far from the storm. This virtual source near the storm center is expected to be observed only from a limited arc around the storm system with increased extent associated with more intense wind fields. This result implies that identifying the extent of the arc observing signal from the virtual source could provide a means to estimate the wind structure using infrasonic observations far from the storm system.},

  doi          = {10.1121/1.5016809},

  journal      = {Journal of the Acoustical Society of America},

  number       = 6,

  volume       = 142,

  place        = {United States},

  year         = {2017},

  month        = {12}

}

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10.1121/1.5016809
https://doi.org/10.1121/1.5016809

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Title: Modeling the refraction of microbaroms by the winds of a large maritime storm

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