Benchmarking microbarom radiation and propagation model against infrasound recordings: a vespagram-based approach
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...
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2021
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Online Access: | https://doi.org/10.5194/angeo-39-515-2021 https://doaj.org/article/a562666de6e348a1a67fbca44c58241d |
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ftdoajarticles:oai:doaj.org/article:a562666de6e348a1a67fbca44c58241d 2023-05-15T17:43:28+02:00 Benchmarking microbarom radiation and propagation model against infrasound recordings: a vespagram-based approach E. Vorobeva M. De Carlo A. Le Pichon P. J. Espy S. P. Näsholm 2021-06-01T00:00:00Z https://doi.org/10.5194/angeo-39-515-2021 https://doaj.org/article/a562666de6e348a1a67fbca44c58241d EN eng Copernicus Publications https://angeo.copernicus.org/articles/39/515/2021/angeo-39-515-2021.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-39-515-2021 0992-7689 1432-0576 https://doaj.org/article/a562666de6e348a1a67fbca44c58241d Annales Geophysicae, Vol 39, Pp 515-531 (2021) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2021 ftdoajarticles https://doi.org/10.5194/angeo-39-515-2021 2022-12-31T09:09:34Z 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. Article in Journal/Newspaper Northern Norway Directory of Open Access Journals: DOAJ Articles Norway Annales Geophysicae 39 3 515 531 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 E. Vorobeva M. De Carlo A. Le Pichon P. J. Espy S. P. Näsholm Benchmarking microbarom radiation and propagation model against infrasound recordings: a vespagram-based approach |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
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. |
format |
Article in Journal/Newspaper |
author |
E. Vorobeva M. De Carlo A. Le Pichon P. J. Espy S. P. Näsholm |
author_facet |
E. Vorobeva M. De Carlo A. Le Pichon P. J. Espy S. P. Näsholm |
author_sort |
E. Vorobeva |
title |
Benchmarking microbarom radiation and propagation model against infrasound recordings: a vespagram-based approach |
title_short |
Benchmarking microbarom radiation and propagation model against infrasound recordings: a vespagram-based approach |
title_full |
Benchmarking microbarom radiation and propagation model against infrasound recordings: a vespagram-based approach |
title_fullStr |
Benchmarking microbarom radiation and propagation model against infrasound recordings: a vespagram-based approach |
title_full_unstemmed |
Benchmarking microbarom radiation and propagation model against infrasound recordings: a vespagram-based approach |
title_sort |
benchmarking microbarom radiation and propagation model against infrasound recordings: a vespagram-based approach |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/angeo-39-515-2021 https://doaj.org/article/a562666de6e348a1a67fbca44c58241d |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Northern Norway |
genre_facet |
Northern Norway |
op_source |
Annales Geophysicae, Vol 39, Pp 515-531 (2021) |
op_relation |
https://angeo.copernicus.org/articles/39/515/2021/angeo-39-515-2021.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-39-515-2021 0992-7689 1432-0576 https://doaj.org/article/a562666de6e348a1a67fbca44c58241d |
op_doi |
https://doi.org/10.5194/angeo-39-515-2021 |
container_title |
Annales Geophysicae |
container_volume |
39 |
container_issue |
3 |
container_start_page |
515 |
op_container_end_page |
531 |
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1766145546434641920 |