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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Language: | English |
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Online Access: | https://hdl.handle.net/11250/2778451 https://doi.org/10.5194/angeo-39-515-2021 |
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ftntnutrondheimi:oai:ntnuopen.ntnu.no:11250/2778451 2023-05-15T17:43:28+02:00 Benchmarking microbarom radiation and propagation model against infrasound recordings: a vespagram-based approach Vorobeva, Ekaterina De Carlo, Marine Le Pichon, Alexis Espy, Patrick Joseph Näsholm, Sven Peter 2021 application/pdf https://hdl.handle.net/11250/2778451 https://doi.org/10.5194/angeo-39-515-2021 eng eng Copernicus Publications Annales Geophysicae. 2021, 39 (3), 515-531. urn:issn:0992-7689 https://hdl.handle.net/11250/2778451 https://doi.org/10.5194/angeo-39-515-2021 cristin:1915402 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no CC-BY 515-531 39 Annales Geophysicae 3 Journal article Peer reviewed 2021 ftntnutrondheimi https://doi.org/10.5194/angeo-39-515-2021 2021-09-22T22:35:32Z 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. publishedVersion Article in Journal/Newspaper Northern Norway NTNU Open Archive (Norwegian University of Science and Technology) Norway Annales Geophysicae 39 3 515 531 |
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Open Polar |
collection |
NTNU Open Archive (Norwegian University of Science and Technology) |
op_collection_id |
ftntnutrondheimi |
language |
English |
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. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Vorobeva, Ekaterina De Carlo, Marine Le Pichon, Alexis Espy, Patrick Joseph Näsholm, Sven Peter |
spellingShingle |
Vorobeva, Ekaterina De Carlo, Marine Le Pichon, Alexis Espy, Patrick Joseph Näsholm, Sven Peter Benchmarking microbarom radiation and propagation model against infrasound recordings: a vespagram-based approach |
author_facet |
Vorobeva, Ekaterina De Carlo, Marine Le Pichon, Alexis Espy, Patrick Joseph Näsholm, Sven Peter |
author_sort |
Vorobeva, Ekaterina |
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://hdl.handle.net/11250/2778451 https://doi.org/10.5194/angeo-39-515-2021 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Northern Norway |
genre_facet |
Northern Norway |
op_source |
515-531 39 Annales Geophysicae 3 |
op_relation |
Annales Geophysicae. 2021, 39 (3), 515-531. urn:issn:0992-7689 https://hdl.handle.net/11250/2778451 https://doi.org/10.5194/angeo-39-515-2021 cristin:1915402 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no |
op_rightsnorm |
CC-BY |
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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1766145548310544384 |