Exploring the signature of polar lows in infrasound: the 19–20 November 2008 cases
We report in this study the infrasound signal measured consistently at four stations in Fennoscandia, associated with the development of two intense cyclones, called polar lows, over the Norwegian Sea. When conditions of propagation are favourable, the infrasound signal comes from the direction of t...
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Stockholm University Press
2017
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Online Access: | https://doi.org/10.1080/16000870.2017.1338885 https://doaj.org/article/644609263b6f4f9b9c196e7ce83b7dcc |
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ftdoajarticles:oai:doaj.org/article:644609263b6f4f9b9c196e7ce83b7dcc 2023-05-15T16:12:09+02:00 Exploring the signature of polar lows in infrasound: the 19–20 November 2008 cases Chantal Claud Francis Dalaudier Johan Kero Alexis Le Pichon Alain Hauchecorne Maxence Rojo Elisabeth Blanc Ludwik Liszka 2017-01-01T00:00:00Z https://doi.org/10.1080/16000870.2017.1338885 https://doaj.org/article/644609263b6f4f9b9c196e7ce83b7dcc EN eng Stockholm University Press http://dx.doi.org/10.1080/16000870.2017.1338885 https://doaj.org/toc/1600-0870 1600-0870 doi:10.1080/16000870.2017.1338885 https://doaj.org/article/644609263b6f4f9b9c196e7ce83b7dcc Tellus: Series A, Dynamic Meteorology and Oceanography, Vol 69, Iss 1 (2017) polar lows infrasound convection Oceanography GC1-1581 Meteorology. Climatology QC851-999 article 2017 ftdoajarticles https://doi.org/10.1080/16000870.2017.1338885 2022-12-31T03:09:04Z We report in this study the infrasound signal measured consistently at four stations in Fennoscandia, associated with the development of two intense cyclones, called polar lows, over the Norwegian Sea. When conditions of propagation are favourable, the infrasound signal comes from the direction of the polar lows, and it follows their track. The results thus, tend to confirm those of a previous study who claimed that an outbreak of three polar lows generated clear infrasound to distances up to 1000 km, according to measurements acquired in Northern Norway and on Svalbard. Because the conditions of propagation of infrasound depend on the state of the atmosphere between the sources and the receivers, signals may remain undetected, which limits the capability of a systematic early warning system, and also of a global monitoring of polar lows. However, the recorded signals might reflect on-going source processes, since convection associated with the polar lows is detected using microwave satellite observations in the areas from which the signals emanate. This suggests that at least part of the signal is due to turbulence induced by convection, in agreement with the earlier study. Nevertheless, more evidence of broadband infrasound measurements of polar low cases have to be examined in order to be able to fully assess the role of other possible sources (swell, surf, lightnings, …). The addition in Northern Norway in late 2013 of the IS37 infrasound station of the International Monitoring Network, developed for the verification of the Comprehensive nuclear-Test-ban Treaty, will provide new opportunities to further investigate this issue. Article in Journal/Newspaper Fennoscandia Northern Norway Norwegian Sea Svalbard Directory of Open Access Journals: DOAJ Articles Svalbard Norwegian Sea Norway Tellus A: Dynamic Meteorology and Oceanography 69 1 1338885 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
polar lows infrasound convection Oceanography GC1-1581 Meteorology. Climatology QC851-999 |
spellingShingle |
polar lows infrasound convection Oceanography GC1-1581 Meteorology. Climatology QC851-999 Chantal Claud Francis Dalaudier Johan Kero Alexis Le Pichon Alain Hauchecorne Maxence Rojo Elisabeth Blanc Ludwik Liszka Exploring the signature of polar lows in infrasound: the 19–20 November 2008 cases |
topic_facet |
polar lows infrasound convection Oceanography GC1-1581 Meteorology. Climatology QC851-999 |
description |
We report in this study the infrasound signal measured consistently at four stations in Fennoscandia, associated with the development of two intense cyclones, called polar lows, over the Norwegian Sea. When conditions of propagation are favourable, the infrasound signal comes from the direction of the polar lows, and it follows their track. The results thus, tend to confirm those of a previous study who claimed that an outbreak of three polar lows generated clear infrasound to distances up to 1000 km, according to measurements acquired in Northern Norway and on Svalbard. Because the conditions of propagation of infrasound depend on the state of the atmosphere between the sources and the receivers, signals may remain undetected, which limits the capability of a systematic early warning system, and also of a global monitoring of polar lows. However, the recorded signals might reflect on-going source processes, since convection associated with the polar lows is detected using microwave satellite observations in the areas from which the signals emanate. This suggests that at least part of the signal is due to turbulence induced by convection, in agreement with the earlier study. Nevertheless, more evidence of broadband infrasound measurements of polar low cases have to be examined in order to be able to fully assess the role of other possible sources (swell, surf, lightnings, …). The addition in Northern Norway in late 2013 of the IS37 infrasound station of the International Monitoring Network, developed for the verification of the Comprehensive nuclear-Test-ban Treaty, will provide new opportunities to further investigate this issue. |
format |
Article in Journal/Newspaper |
author |
Chantal Claud Francis Dalaudier Johan Kero Alexis Le Pichon Alain Hauchecorne Maxence Rojo Elisabeth Blanc Ludwik Liszka |
author_facet |
Chantal Claud Francis Dalaudier Johan Kero Alexis Le Pichon Alain Hauchecorne Maxence Rojo Elisabeth Blanc Ludwik Liszka |
author_sort |
Chantal Claud |
title |
Exploring the signature of polar lows in infrasound: the 19–20 November 2008 cases |
title_short |
Exploring the signature of polar lows in infrasound: the 19–20 November 2008 cases |
title_full |
Exploring the signature of polar lows in infrasound: the 19–20 November 2008 cases |
title_fullStr |
Exploring the signature of polar lows in infrasound: the 19–20 November 2008 cases |
title_full_unstemmed |
Exploring the signature of polar lows in infrasound: the 19–20 November 2008 cases |
title_sort |
exploring the signature of polar lows in infrasound: the 19–20 november 2008 cases |
publisher |
Stockholm University Press |
publishDate |
2017 |
url |
https://doi.org/10.1080/16000870.2017.1338885 https://doaj.org/article/644609263b6f4f9b9c196e7ce83b7dcc |
geographic |
Svalbard Norwegian Sea Norway |
geographic_facet |
Svalbard Norwegian Sea Norway |
genre |
Fennoscandia Northern Norway Norwegian Sea Svalbard |
genre_facet |
Fennoscandia Northern Norway Norwegian Sea Svalbard |
op_source |
Tellus: Series A, Dynamic Meteorology and Oceanography, Vol 69, Iss 1 (2017) |
op_relation |
http://dx.doi.org/10.1080/16000870.2017.1338885 https://doaj.org/toc/1600-0870 1600-0870 doi:10.1080/16000870.2017.1338885 https://doaj.org/article/644609263b6f4f9b9c196e7ce83b7dcc |
op_doi |
https://doi.org/10.1080/16000870.2017.1338885 |
container_title |
Tellus A: Dynamic Meteorology and Oceanography |
container_volume |
69 |
container_issue |
1 |
container_start_page |
1338885 |
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