Rankin Inlet PolarDARN radar observations of duskward moving Sun-aligned optical forms
On 15 February 2007, several duskward moving sun-aligned (SA) auroral forms have been observed by the all-sky camera at Resolute Bay, Nunavut (Canada). Concurrent observations with the Rankin Inlet (RANK) PolarDARN HF radar within the field-of-view of the camera showed signatures of moving auroral f...
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ftdoajarticles:oai:doaj.org/article:f809b3ce8792475d95cbbf52ef49742b 2023-05-15T17:48:03+02:00 Rankin Inlet PolarDARN radar observations of duskward moving Sun-aligned optical forms A. Koustov K. Hosokawa N. Nishitani T. Ogawa K. Shiokawa 2008-09-01T00:00:00Z https://doi.org/10.5194/angeo-26-2711-2008 https://doaj.org/article/f809b3ce8792475d95cbbf52ef49742b EN eng Copernicus Publications https://www.ann-geophys.net/26/2711/2008/angeo-26-2711-2008.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-26-2711-2008 0992-7689 1432-0576 https://doaj.org/article/f809b3ce8792475d95cbbf52ef49742b Annales Geophysicae, Vol 26, Pp 2711-2723 (2008) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2008 ftdoajarticles https://doi.org/10.5194/angeo-26-2711-2008 2022-12-31T04:42:57Z On 15 February 2007, several duskward moving sun-aligned (SA) auroral forms have been observed by the all-sky camera at Resolute Bay, Nunavut (Canada). Concurrent observations with the Rankin Inlet (RANK) PolarDARN HF radar within the field-of-view of the camera showed signatures of moving auroral forms in all signal parameters with the most remarkable effects being the echo power drop and velocity reversal as the arc reached a specific radar beam/gate. Spatial and temporal variations of the velocity in the vicinity of the SA form are investigated. It is shown that the form-associated convection reversal was located poleward (duskward) of the global-scale convection reversal associated with the dawn cell of the large-scale convection pattern. Thus, the RANK radar was monitoring the polar cap portion of the global-scale convection pattern and its transition from the IMF B y <0 to the B y >0 situation. Magnetic perturbations associated with the SA form passing the zenith of several magnetometers are investigated. It is shown that although magnetometer signatures of the moving form were clear, the convection pattern derivation from magnetometer records alone is not straightforward. Article in Journal/Newspaper Nunavut Rankin Inlet Resolute Bay Directory of Open Access Journals: DOAJ Articles Nunavut Canada Resolute Bay ENVELOPE(-94.842,-94.842,74.677,74.677) Rankin Inlet ENVELOPE(-91.983,-91.983,62.734,62.734) Annales Geophysicae 26 9 2711 2723 |
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. Koustov K. Hosokawa N. Nishitani T. Ogawa K. Shiokawa Rankin Inlet PolarDARN radar observations of duskward moving Sun-aligned optical forms |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
On 15 February 2007, several duskward moving sun-aligned (SA) auroral forms have been observed by the all-sky camera at Resolute Bay, Nunavut (Canada). Concurrent observations with the Rankin Inlet (RANK) PolarDARN HF radar within the field-of-view of the camera showed signatures of moving auroral forms in all signal parameters with the most remarkable effects being the echo power drop and velocity reversal as the arc reached a specific radar beam/gate. Spatial and temporal variations of the velocity in the vicinity of the SA form are investigated. It is shown that the form-associated convection reversal was located poleward (duskward) of the global-scale convection reversal associated with the dawn cell of the large-scale convection pattern. Thus, the RANK radar was monitoring the polar cap portion of the global-scale convection pattern and its transition from the IMF B y <0 to the B y >0 situation. Magnetic perturbations associated with the SA form passing the zenith of several magnetometers are investigated. It is shown that although magnetometer signatures of the moving form were clear, the convection pattern derivation from magnetometer records alone is not straightforward. |
format |
Article in Journal/Newspaper |
author |
A. Koustov K. Hosokawa N. Nishitani T. Ogawa K. Shiokawa |
author_facet |
A. Koustov K. Hosokawa N. Nishitani T. Ogawa K. Shiokawa |
author_sort |
A. Koustov |
title |
Rankin Inlet PolarDARN radar observations of duskward moving Sun-aligned optical forms |
title_short |
Rankin Inlet PolarDARN radar observations of duskward moving Sun-aligned optical forms |
title_full |
Rankin Inlet PolarDARN radar observations of duskward moving Sun-aligned optical forms |
title_fullStr |
Rankin Inlet PolarDARN radar observations of duskward moving Sun-aligned optical forms |
title_full_unstemmed |
Rankin Inlet PolarDARN radar observations of duskward moving Sun-aligned optical forms |
title_sort |
rankin inlet polardarn radar observations of duskward moving sun-aligned optical forms |
publisher |
Copernicus Publications |
publishDate |
2008 |
url |
https://doi.org/10.5194/angeo-26-2711-2008 https://doaj.org/article/f809b3ce8792475d95cbbf52ef49742b |
long_lat |
ENVELOPE(-94.842,-94.842,74.677,74.677) ENVELOPE(-91.983,-91.983,62.734,62.734) |
geographic |
Nunavut Canada Resolute Bay Rankin Inlet |
geographic_facet |
Nunavut Canada Resolute Bay Rankin Inlet |
genre |
Nunavut Rankin Inlet Resolute Bay |
genre_facet |
Nunavut Rankin Inlet Resolute Bay |
op_source |
Annales Geophysicae, Vol 26, Pp 2711-2723 (2008) |
op_relation |
https://www.ann-geophys.net/26/2711/2008/angeo-26-2711-2008.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-26-2711-2008 0992-7689 1432-0576 https://doaj.org/article/f809b3ce8792475d95cbbf52ef49742b |
op_doi |
https://doi.org/10.5194/angeo-26-2711-2008 |
container_title |
Annales Geophysicae |
container_volume |
26 |
container_issue |
9 |
container_start_page |
2711 |
op_container_end_page |
2723 |
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1766153239405789184 |