Turbulent seismoacoustic imprints during a hurricane landfall.
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| Title: | Turbulent seismoacoustic imprints during a hurricane landfall. |
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| Authors: | Ji, Qing (AUTHOR), Dey, Ipshita (AUTHOR), Dunham, Eric M. (AUTHOR) |
| Source: | Science. 8/6/2026, Vol. 393 Issue 6811, p628-632. 5p. |
| Subjects: | Turbulence, Boundary layer (Aerodynamics), Atmospheric acoustics, Infrasonic waves, Hurricanes, Wind speed, Large eddy simulation models |
| Abstract: | Hurricane evolution is affected by turbulence in the hurricane boundary layer (HBL), which is typically measured using aircraft flights and towers. Through a case study of a landfalling hurricane, we show that seismoacoustic data can also be used for HBL turbulence analysis. We identified contributions of HBL turbulence in infrasound pressure and seismic displacement, validating our interpretation by combining large-eddy simulation, calibrated with meteorological data, with quasi-static elastic deformation modeling. The convection velocity of the turbulent pressure field is key to this pressure–displacement coupling. For atmospheric studies, continuous infrasound pressure serves as a proxy for 10-meter wind speed, and the inertial subrange of pressure spectra provides an estimate of the turbulent dissipation rate near the top of the surface layer at ~100 to 200 meters, complementing portable tower data at ~10 meters. Editor's summary: As a hurricane makes landfall, turbulence in its near-surface layer is converted to heat, shifting the storm's energy budget. Turbulence data can be collected by aircraft and portable wind towers, but neither provides continuous recordings at optimal heights. Using the 2012 Hurricane Isaac as a case study, Ji et al. showed that transportable array seismo-acoustic stations are capable of measuring turbulent pressure fluctuations and coupled ground displacement from high-rate infrasound and seismometer data, respectively (see the Perspective by Williams). Large-eddy simulations validated their derivation of top-surface-layer turbulent dissipation rate from infrasound pressure data, which also scale to near-surface wind speed. —Angela Hessler [ABSTRACT FROM AUTHOR] |
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| Database: | Psychology and Behavioral Sciences Collection |
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| Abstract: | Hurricane evolution is affected by turbulence in the hurricane boundary layer (HBL), which is typically measured using aircraft flights and towers. Through a case study of a landfalling hurricane, we show that seismoacoustic data can also be used for HBL turbulence analysis. We identified contributions of HBL turbulence in infrasound pressure and seismic displacement, validating our interpretation by combining large-eddy simulation, calibrated with meteorological data, with quasi-static elastic deformation modeling. The convection velocity of the turbulent pressure field is key to this pressure–displacement coupling. For atmospheric studies, continuous infrasound pressure serves as a proxy for 10-meter wind speed, and the inertial subrange of pressure spectra provides an estimate of the turbulent dissipation rate near the top of the surface layer at ~100 to 200 meters, complementing portable tower data at ~10 meters. Editor's summary: As a hurricane makes landfall, turbulence in its near-surface layer is converted to heat, shifting the storm's energy budget. Turbulence data can be collected by aircraft and portable wind towers, but neither provides continuous recordings at optimal heights. Using the 2012 Hurricane Isaac as a case study, Ji et al. showed that transportable array seismo-acoustic stations are capable of measuring turbulent pressure fluctuations and coupled ground displacement from high-rate infrasound and seismometer data, respectively (see the Perspective by Williams). Large-eddy simulations validated their derivation of top-surface-layer turbulent dissipation rate from infrasound pressure data, which also scale to near-surface wind speed. —Angela Hessler [ABSTRACT FROM AUTHOR] |
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| ISSN: | 00368075 |
| DOI: | 10.1126/science.adt7323 |
