A study of Traveling Ionospheric Disturbances and Atmospheric Gravity Waves using EISCAT Svalbard Radar IPY-data
We present a statistical study of Traveling Ionospheric Disturbances (TIDs) as observed by the EISCAT Svalbard Radar (ESR) during the continuous IPY-run (March 2007–February 2008) with field-aligned measurements. We have developed a semi-automatic routine for searching and extracting Atmospheric Gra...
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ftdoajarticles:oai:doaj.org/article:129bcedd62ca40079c5cae9376477f71 2023-05-15T16:04:39+02:00 A study of Traveling Ionospheric Disturbances and Atmospheric Gravity Waves using EISCAT Svalbard Radar IPY-data A. Vlasov K. Kauristie M. van de Kamp J.-P. Luntama A. Pogoreltsev 2011-11-01T00:00:00Z https://doi.org/10.5194/angeo-29-2101-2011 https://doaj.org/article/129bcedd62ca40079c5cae9376477f71 EN eng Copernicus Publications https://www.ann-geophys.net/29/2101/2011/angeo-29-2101-2011.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-29-2101-2011 0992-7689 1432-0576 https://doaj.org/article/129bcedd62ca40079c5cae9376477f71 Annales Geophysicae, Vol 29, Pp 2101-2116 (2011) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2011 ftdoajarticles https://doi.org/10.5194/angeo-29-2101-2011 2022-12-31T05:37:25Z We present a statistical study of Traveling Ionospheric Disturbances (TIDs) as observed by the EISCAT Svalbard Radar (ESR) during the continuous IPY-run (March 2007–February 2008) with field-aligned measurements. We have developed a semi-automatic routine for searching and extracting Atmospheric Gravity Wave (AGW) activity. The collected data shows that AGW-TID signatures are common in the high-latitude ionosphere especially in the field-aligned ion velocity data (244 cases of AGW-TID signatures in daily records), but they can be observed also in electron density (26 cases), electron temperature (12 cases) and ion temperature (26 cases). During the IPY campaign (in solar minimum conditions) AGW-TID events appear more frequently during summer months than during the winter months. It remains still as a topic for future studies whether the observed seasonal variation is natural or caused by seasonal variation in the performance of the observational method that we use (AGW-TID signature may be more pronounced in a dense ionosphere). In our AGW-TID dataset the distribution of the oscillation periods has two peaks, one around 0.5–0.7 h and the other around 1.1–1.3 h. The diurnal occurrence rate has a deep minimum in the region of magnetic midnight, which might be partly explained by irregular auroral activity obscuring the TID signatures from our detection routines. As both the period and horizontal phase speed estimates (as derived from the classical AGW dispersion relation) show values typical both for large scale TIDs and mesoscale TIDs it is difficult to distinguish whether the generator for high-latitude AGW-TIDs resides typically in the troposphere or in the near-Earth space. The results of our statistical analysis give anyway some valuable reference information for the future efforts to learn more about the dominating TID source mechanisms in polar cap conditions, and to improve AGW simulations. Article in Journal/Newspaper EISCAT IPY Svalbard Directory of Open Access Journals: DOAJ Articles Svalbard Annales Geophysicae 29 11 2101 2116 |
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 A. Vlasov K. Kauristie M. van de Kamp J.-P. Luntama A. Pogoreltsev A study of Traveling Ionospheric Disturbances and Atmospheric Gravity Waves using EISCAT Svalbard Radar IPY-data |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
We present a statistical study of Traveling Ionospheric Disturbances (TIDs) as observed by the EISCAT Svalbard Radar (ESR) during the continuous IPY-run (March 2007–February 2008) with field-aligned measurements. We have developed a semi-automatic routine for searching and extracting Atmospheric Gravity Wave (AGW) activity. The collected data shows that AGW-TID signatures are common in the high-latitude ionosphere especially in the field-aligned ion velocity data (244 cases of AGW-TID signatures in daily records), but they can be observed also in electron density (26 cases), electron temperature (12 cases) and ion temperature (26 cases). During the IPY campaign (in solar minimum conditions) AGW-TID events appear more frequently during summer months than during the winter months. It remains still as a topic for future studies whether the observed seasonal variation is natural or caused by seasonal variation in the performance of the observational method that we use (AGW-TID signature may be more pronounced in a dense ionosphere). In our AGW-TID dataset the distribution of the oscillation periods has two peaks, one around 0.5–0.7 h and the other around 1.1–1.3 h. The diurnal occurrence rate has a deep minimum in the region of magnetic midnight, which might be partly explained by irregular auroral activity obscuring the TID signatures from our detection routines. As both the period and horizontal phase speed estimates (as derived from the classical AGW dispersion relation) show values typical both for large scale TIDs and mesoscale TIDs it is difficult to distinguish whether the generator for high-latitude AGW-TIDs resides typically in the troposphere or in the near-Earth space. The results of our statistical analysis give anyway some valuable reference information for the future efforts to learn more about the dominating TID source mechanisms in polar cap conditions, and to improve AGW simulations. |
format |
Article in Journal/Newspaper |
author |
A. Vlasov K. Kauristie M. van de Kamp J.-P. Luntama A. Pogoreltsev |
author_facet |
A. Vlasov K. Kauristie M. van de Kamp J.-P. Luntama A. Pogoreltsev |
author_sort |
A. Vlasov |
title |
A study of Traveling Ionospheric Disturbances and Atmospheric Gravity Waves using EISCAT Svalbard Radar IPY-data |
title_short |
A study of Traveling Ionospheric Disturbances and Atmospheric Gravity Waves using EISCAT Svalbard Radar IPY-data |
title_full |
A study of Traveling Ionospheric Disturbances and Atmospheric Gravity Waves using EISCAT Svalbard Radar IPY-data |
title_fullStr |
A study of Traveling Ionospheric Disturbances and Atmospheric Gravity Waves using EISCAT Svalbard Radar IPY-data |
title_full_unstemmed |
A study of Traveling Ionospheric Disturbances and Atmospheric Gravity Waves using EISCAT Svalbard Radar IPY-data |
title_sort |
study of traveling ionospheric disturbances and atmospheric gravity waves using eiscat svalbard radar ipy-data |
publisher |
Copernicus Publications |
publishDate |
2011 |
url |
https://doi.org/10.5194/angeo-29-2101-2011 https://doaj.org/article/129bcedd62ca40079c5cae9376477f71 |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
EISCAT IPY Svalbard |
genre_facet |
EISCAT IPY Svalbard |
op_source |
Annales Geophysicae, Vol 29, Pp 2101-2116 (2011) |
op_relation |
https://www.ann-geophys.net/29/2101/2011/angeo-29-2101-2011.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-29-2101-2011 0992-7689 1432-0576 https://doaj.org/article/129bcedd62ca40079c5cae9376477f71 |
op_doi |
https://doi.org/10.5194/angeo-29-2101-2011 |
container_title |
Annales Geophysicae |
container_volume |
29 |
container_issue |
11 |
container_start_page |
2101 |
op_container_end_page |
2116 |
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1766400259755343872 |