Microbaroms are atmospheric pressure oscillations radiated from non-linear ocean surface wave interactions. Large regions of interacting high-energetic ocean waves, e.g., ocean swell and marine storms, radiate almost continuously acoustic energy. Microbaroms dominate the infrasound ambient noise field, which makes them a preferred source for passive atmospheric probing. Microbarom are simulated using a two-fluid model, representing an atmosphere over a finite-depth ocean and a coupled ocean-wave model providing the sea state. Air-sea coupling is crucial due to the two-way interaction between surface winds and ocean waves. In this study, a detailed overview is given on how global microbarom simulations are obtained, including a sensitivity analysis of the various model input data and parameterizations. Simulations are validated by infrasound array observations of the International Monitoring Systems (IMS) of the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO). An brief demonstration is given on the added value of global microbarom simulationsfor infrasound studies and how to obtain these source simulations.
Skip Nav Destination
Meeting abstract. No PDF available.
May 01 2017
Simulating global atmospheric microbaroms from 2010 onward
J. Acoust. Soc. Am. 141, 3628 (2017)
Pieter Smets, Jelle Assink, Läslo Evers; Simulating global atmospheric microbaroms from 2010 onward. J. Acoust. Soc. Am. 1 May 2017; 141 (5_Supplement): 3628. https://doi.org/10.1121/1.4987802
Download citation file: