Skip to Main content Skip to Navigation
Journal articles

Benchmarking microbarom radiation and propagation model against infrasound recordings: a vespagram-based approach

Abstract : This study investigates the use of a vespagram-based approach as a tool for multi-directional comparison between simulated microbarom soundscapes and infrasound data recorded at ground-based array stations. Data recorded at the IS37 station in northern Norway during 2014-2019 have been processed to generate vespagrams (velocity spectral analysis) for five frequency bands between 0.1 and 0.6 Hz. The back azimuth resolution between the vespagram and the microbarom model is harmonized by smoothing the modeled soundscapes along the back azimuth axis with a kernel corresponding to the frequency-dependent array resolution. An estimate of similarity between the output of the microbarom radiation and propagation model and infrasound observations is then generated based on the image-processing approach of the mean square difference. The analysis reveals that vespagrams can monitor seasonal variations in the microbarom azimuthal distribution, amplitude, and frequency, as well as changes during sudden stratospheric warming events. The vespagram-based approach is computationally inexpensive, can uncover microbarom source variability, and has the potential for near-real-time stratospheric diagnostics and atmospheric model assessment.
Document type :
Journal articles
Complete list of metadata

https://hal-insu.archives-ouvertes.fr/insu-03683264
Contributor : Nathalie POTHIER Connect in order to contact the contributor
Submitted on : Tuesday, May 31, 2022 - 4:50:37 PM
Last modification on : Wednesday, June 1, 2022 - 3:39:00 AM

File

angeo-39-515-2021.pdf
Publisher files allowed on an open archive

Licence


Distributed under a Creative Commons Attribution 4.0 International License

Identifiers

Collections

Citation

Ekaterina Vorobeva, Marine de Carlo, Alexis Le Pichon, Patrick Joseph Espy, Sven Peter Näsholm. Benchmarking microbarom radiation and propagation model against infrasound recordings: a vespagram-based approach. Annales Geophysicae, 2021, 39, pp.515-531. ⟨10.5194/angeo-39-515-2021⟩. ⟨insu-03683264⟩

Share

Metrics

Record views

0

Files downloads

0