Statistical characteristics of Doppler spectral width as observed by the conjugate SuperDARN radars
We performed a statistical analysis of the occurrence distribution of Doppler spectral width around the day-side high-latitude ionosphere using data from the conjugate radar pair composed of the CUTLASS Iceland-East radar in the Northern Hemisphere and the SENSU Syowa-East radar in the Southern Hemi...
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European Geosciences Union (EGU), Copernicus Publications, Springer Verlag (Germany)
2017
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Online Access: | http://www.ann-geophys.net/20/1213/2002/ http://hdl.handle.net/2381/39284 https://doi.org/10.5194/angeo-20-1213-2002 |
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ftleicester:oai:lra.le.ac.uk:2381/39284 2023-05-15T16:48:50+02:00 Statistical characteristics of Doppler spectral width as observed by the conjugate SuperDARN radars Hosokawa, K. Woodfield, E. E. Lester, M. Milan, S. E. Sato, N. Yukimatu, A. S. Iyemori, T. 2017-01-24T11:32:57Z http://www.ann-geophys.net/20/1213/2002/ http://hdl.handle.net/2381/39284 https://doi.org/10.5194/angeo-20-1213-2002 en eng European Geosciences Union (EGU), Copernicus Publications, Springer Verlag (Germany) Annales Geophysicae, 2002, 20 (8), pp. 1213-1223 (11) 0992-7689 http://www.ann-geophys.net/20/1213/2002/ http://hdl.handle.net/2381/39284 doi:10.5194/angeo-20-1213-2002 1432-0576 © Author(s) 2002. This work is distributed under the Creative Commons Attribution 3.0 License. CC-BY Science & Technology Physical Sciences Astronomy & Astrophysics Geosciences Multidisciplinary Meteorology & Atmospheric Sciences Geology ionosphere ionosphere-magnetosphere interactions plasma convection magnetospheric physics magnetopause cusp and boundary layers BOUNDARY-LAYER CAMPAIGN COHERENT HF RADAR AURORAL ACTIVITY F-REGION IDENTIFICATION IRREGULARITIES BACKSCATTER FIELD DMSP Journal Article Article;Journal 2017 ftleicester https://doi.org/10.5194/angeo-20-1213-2002 2019-03-22T20:21:26Z We performed a statistical analysis of the occurrence distribution of Doppler spectral width around the day-side high-latitude ionosphere using data from the conjugate radar pair composed of the CUTLASS Iceland-East radar in the Northern Hemisphere and the SENSU Syowa-East radar in the Southern Hemisphere. Three types of spectral width distribution were identified: (1) an exponential-like distribution in the lower magnetic latitudes (below 72°), (2) a Gaussian-like distribution around a few degrees magnetic latitude, centered on 78°, and (3) another type of distribution in the higher magnetic latitudes (above 80°). The first two are considered to represent the geophysical regimes such as the LLBL and the cusp, respectively, because they are similar to the spectral width distributions within the LLBL and the cusp, as classified by Baker et al. (1995). The distribution found above 80° magnetic latitude has been clarified for the first time in this study. This distribution has similarities to the exponential-like distribution in the lower latitude part, although clear differences also exist in their characteristics. These three spectral width distributions are commonly identified in conjugate hemispheres. The latitudinal transition from one distribution to another exhibits basically the same trend between two hemispheres. There is, however, an interhemispheric difference in the form of the distribution around the cusp latitudes, such that spectral width values obtained from Syowa-East are larger than those from Iceland-East. On the basis of the spectral width characteristics, the average locations of the cusp and the open/closed field line boundary are estimated statistically. The Iceland East-Finland radar pair (the Cooperative UK Twin Located Auroral Sounding System : CUTLASS) is funded by the Particle Physics and Astronomy Research Council (PPARC), U.K., under grant PPA/R/R/1997/00256, the Finnish Meteorological Institute, Helsinki, and the Swedish Institute for Space Research, Uppsala. The Ministry of Education, Culture, Sports, Science and Technology supports the Syowa HF radar systems. The 39th, 40th and 41th JAREs have carried out the HF radar operation at Syowa. This research is supported by the Grantin Aid for Scientific Research (A:11304029) from Japan Society for the Promotion of Science (JSPS). This study is funded by a part of ‘Ground Research for Space Utilization’ promoted by NASDA and Japan Space Forum. EEW is indebted to PPARC for a research studentship. Peer-reviewed Publisher Version Article in Journal/Newspaper Iceland University of Leicester: Leicester Research Archive (LRA) Annales Geophysicae 20 8 1213 1223 |
institution |
Open Polar |
collection |
University of Leicester: Leicester Research Archive (LRA) |
op_collection_id |
ftleicester |
language |
English |
topic |
Science & Technology Physical Sciences Astronomy & Astrophysics Geosciences Multidisciplinary Meteorology & Atmospheric Sciences Geology ionosphere ionosphere-magnetosphere interactions plasma convection magnetospheric physics magnetopause cusp and boundary layers BOUNDARY-LAYER CAMPAIGN COHERENT HF RADAR AURORAL ACTIVITY F-REGION IDENTIFICATION IRREGULARITIES BACKSCATTER FIELD DMSP |
spellingShingle |
Science & Technology Physical Sciences Astronomy & Astrophysics Geosciences Multidisciplinary Meteorology & Atmospheric Sciences Geology ionosphere ionosphere-magnetosphere interactions plasma convection magnetospheric physics magnetopause cusp and boundary layers BOUNDARY-LAYER CAMPAIGN COHERENT HF RADAR AURORAL ACTIVITY F-REGION IDENTIFICATION IRREGULARITIES BACKSCATTER FIELD DMSP Hosokawa, K. Woodfield, E. E. Lester, M. Milan, S. E. Sato, N. Yukimatu, A. S. Iyemori, T. Statistical characteristics of Doppler spectral width as observed by the conjugate SuperDARN radars |
topic_facet |
Science & Technology Physical Sciences Astronomy & Astrophysics Geosciences Multidisciplinary Meteorology & Atmospheric Sciences Geology ionosphere ionosphere-magnetosphere interactions plasma convection magnetospheric physics magnetopause cusp and boundary layers BOUNDARY-LAYER CAMPAIGN COHERENT HF RADAR AURORAL ACTIVITY F-REGION IDENTIFICATION IRREGULARITIES BACKSCATTER FIELD DMSP |
description |
We performed a statistical analysis of the occurrence distribution of Doppler spectral width around the day-side high-latitude ionosphere using data from the conjugate radar pair composed of the CUTLASS Iceland-East radar in the Northern Hemisphere and the SENSU Syowa-East radar in the Southern Hemisphere. Three types of spectral width distribution were identified: (1) an exponential-like distribution in the lower magnetic latitudes (below 72°), (2) a Gaussian-like distribution around a few degrees magnetic latitude, centered on 78°, and (3) another type of distribution in the higher magnetic latitudes (above 80°). The first two are considered to represent the geophysical regimes such as the LLBL and the cusp, respectively, because they are similar to the spectral width distributions within the LLBL and the cusp, as classified by Baker et al. (1995). The distribution found above 80° magnetic latitude has been clarified for the first time in this study. This distribution has similarities to the exponential-like distribution in the lower latitude part, although clear differences also exist in their characteristics. These three spectral width distributions are commonly identified in conjugate hemispheres. The latitudinal transition from one distribution to another exhibits basically the same trend between two hemispheres. There is, however, an interhemispheric difference in the form of the distribution around the cusp latitudes, such that spectral width values obtained from Syowa-East are larger than those from Iceland-East. On the basis of the spectral width characteristics, the average locations of the cusp and the open/closed field line boundary are estimated statistically. The Iceland East-Finland radar pair (the Cooperative UK Twin Located Auroral Sounding System : CUTLASS) is funded by the Particle Physics and Astronomy Research Council (PPARC), U.K., under grant PPA/R/R/1997/00256, the Finnish Meteorological Institute, Helsinki, and the Swedish Institute for Space Research, Uppsala. The Ministry of Education, Culture, Sports, Science and Technology supports the Syowa HF radar systems. The 39th, 40th and 41th JAREs have carried out the HF radar operation at Syowa. This research is supported by the Grantin Aid for Scientific Research (A:11304029) from Japan Society for the Promotion of Science (JSPS). This study is funded by a part of ‘Ground Research for Space Utilization’ promoted by NASDA and Japan Space Forum. EEW is indebted to PPARC for a research studentship. Peer-reviewed Publisher Version |
format |
Article in Journal/Newspaper |
author |
Hosokawa, K. Woodfield, E. E. Lester, M. Milan, S. E. Sato, N. Yukimatu, A. S. Iyemori, T. |
author_facet |
Hosokawa, K. Woodfield, E. E. Lester, M. Milan, S. E. Sato, N. Yukimatu, A. S. Iyemori, T. |
author_sort |
Hosokawa, K. |
title |
Statistical characteristics of Doppler spectral width as observed by the conjugate SuperDARN radars |
title_short |
Statistical characteristics of Doppler spectral width as observed by the conjugate SuperDARN radars |
title_full |
Statistical characteristics of Doppler spectral width as observed by the conjugate SuperDARN radars |
title_fullStr |
Statistical characteristics of Doppler spectral width as observed by the conjugate SuperDARN radars |
title_full_unstemmed |
Statistical characteristics of Doppler spectral width as observed by the conjugate SuperDARN radars |
title_sort |
statistical characteristics of doppler spectral width as observed by the conjugate superdarn radars |
publisher |
European Geosciences Union (EGU), Copernicus Publications, Springer Verlag (Germany) |
publishDate |
2017 |
url |
http://www.ann-geophys.net/20/1213/2002/ http://hdl.handle.net/2381/39284 https://doi.org/10.5194/angeo-20-1213-2002 |
genre |
Iceland |
genre_facet |
Iceland |
op_relation |
Annales Geophysicae, 2002, 20 (8), pp. 1213-1223 (11) 0992-7689 http://www.ann-geophys.net/20/1213/2002/ http://hdl.handle.net/2381/39284 doi:10.5194/angeo-20-1213-2002 1432-0576 |
op_rights |
© Author(s) 2002. This work is distributed under the Creative Commons Attribution 3.0 License. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/angeo-20-1213-2002 |
container_title |
Annales Geophysicae |
container_volume |
20 |
container_issue |
8 |
container_start_page |
1213 |
op_container_end_page |
1223 |
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1766038935925948416 |