Arctic and Antarctic polar mesosphere summer echoes observed with oblique incidence HF radars: analysis using simultaneous MF and VHF radar data
Polar mesosphere summer echoes (PMSEs) have been well studied using vertical incidence VHF radars at northern high-latitudes. In this paper, two PMSE events detected with the oblique incidence SuperDARN HF radars at Hankasalmi, Finland (62.3° N) and Syowa Station, Antarctica (69.0° S), are analyzed,...
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ftdoajarticles:oai:doaj.org/article:c495430ceb9447deb974290b60e07bae 2023-05-15T13:50:29+02:00 Arctic and Antarctic polar mesosphere summer echoes observed with oblique incidence HF radars: analysis using simultaneous MF and VHF radar data T. Ogawa S. Nozawa M. Tsutsumi N. F. Arnold N. Nishitani N. Sato A. S. Yukimatu 2004-12-01T00:00:00Z https://doi.org/10.5194/angeo-22-4049-2004 https://doaj.org/article/c495430ceb9447deb974290b60e07bae EN eng Copernicus Publications https://www.ann-geophys.net/22/4049/2004/angeo-22-4049-2004.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-22-4049-2004 0992-7689 1432-0576 https://doaj.org/article/c495430ceb9447deb974290b60e07bae Annales Geophysicae, Vol 22, Pp 4049-4059 (2004) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2004 ftdoajarticles https://doi.org/10.5194/angeo-22-4049-2004 2022-12-31T11:55:15Z Polar mesosphere summer echoes (PMSEs) have been well studied using vertical incidence VHF radars at northern high-latitudes. In this paper, two PMSE events detected with the oblique incidence SuperDARN HF radars at Hankasalmi, Finland (62.3° N) and Syowa Station, Antarctica (69.0° S), are analyzed, together with simultaneous VHF and medium-frequency (MF) radar data. Altitude resolutions of the HF radars in the mesosphere and the lower thermosphere are too poor to know exact PMSE altitudes. However, a comparison of Doppler velocity from the HF radar and neutral wind velocity from the MF radar shows that PMSEs at the HF band appeared at altitudes within 80-90km, which are consistent with those from previous vertical incidence HF-VHF radar results. The HF-VHF PMSE occurrences exhibit a semidiurnal behavior, as observed by other researchers. It is found that in one event, PMSEs occurred when westward semidiurnal winds with large amplitude at 85-88km altitudes attained a maximum. When the HF-VHF PMSEs were observed at distances beyond 180km from MF radar sites, the MF radars detected no appreciable signatures of echo enhancement. Key words. Meteorology and atmospheric dynamics (middle atmosphere dynamics; thermospheric dynamics; waves and tides) Article in Journal/Newspaper Antarc* Antarctic Antarctica Arctic Directory of Open Access Journals: DOAJ Articles Arctic Antarctic Syowa Station Annales Geophysicae 22 12 4049 4059 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
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English |
topic |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 T. Ogawa S. Nozawa M. Tsutsumi N. F. Arnold N. Nishitani N. Sato A. S. Yukimatu Arctic and Antarctic polar mesosphere summer echoes observed with oblique incidence HF radars: analysis using simultaneous MF and VHF radar data |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
Polar mesosphere summer echoes (PMSEs) have been well studied using vertical incidence VHF radars at northern high-latitudes. In this paper, two PMSE events detected with the oblique incidence SuperDARN HF radars at Hankasalmi, Finland (62.3° N) and Syowa Station, Antarctica (69.0° S), are analyzed, together with simultaneous VHF and medium-frequency (MF) radar data. Altitude resolutions of the HF radars in the mesosphere and the lower thermosphere are too poor to know exact PMSE altitudes. However, a comparison of Doppler velocity from the HF radar and neutral wind velocity from the MF radar shows that PMSEs at the HF band appeared at altitudes within 80-90km, which are consistent with those from previous vertical incidence HF-VHF radar results. The HF-VHF PMSE occurrences exhibit a semidiurnal behavior, as observed by other researchers. It is found that in one event, PMSEs occurred when westward semidiurnal winds with large amplitude at 85-88km altitudes attained a maximum. When the HF-VHF PMSEs were observed at distances beyond 180km from MF radar sites, the MF radars detected no appreciable signatures of echo enhancement. Key words. Meteorology and atmospheric dynamics (middle atmosphere dynamics; thermospheric dynamics; waves and tides) |
format |
Article in Journal/Newspaper |
author |
T. Ogawa S. Nozawa M. Tsutsumi N. F. Arnold N. Nishitani N. Sato A. S. Yukimatu |
author_facet |
T. Ogawa S. Nozawa M. Tsutsumi N. F. Arnold N. Nishitani N. Sato A. S. Yukimatu |
author_sort |
T. Ogawa |
title |
Arctic and Antarctic polar mesosphere summer echoes observed with oblique incidence HF radars: analysis using simultaneous MF and VHF radar data |
title_short |
Arctic and Antarctic polar mesosphere summer echoes observed with oblique incidence HF radars: analysis using simultaneous MF and VHF radar data |
title_full |
Arctic and Antarctic polar mesosphere summer echoes observed with oblique incidence HF radars: analysis using simultaneous MF and VHF radar data |
title_fullStr |
Arctic and Antarctic polar mesosphere summer echoes observed with oblique incidence HF radars: analysis using simultaneous MF and VHF radar data |
title_full_unstemmed |
Arctic and Antarctic polar mesosphere summer echoes observed with oblique incidence HF radars: analysis using simultaneous MF and VHF radar data |
title_sort |
arctic and antarctic polar mesosphere summer echoes observed with oblique incidence hf radars: analysis using simultaneous mf and vhf radar data |
publisher |
Copernicus Publications |
publishDate |
2004 |
url |
https://doi.org/10.5194/angeo-22-4049-2004 https://doaj.org/article/c495430ceb9447deb974290b60e07bae |
geographic |
Arctic Antarctic Syowa Station |
geographic_facet |
Arctic Antarctic Syowa Station |
genre |
Antarc* Antarctic Antarctica Arctic |
genre_facet |
Antarc* Antarctic Antarctica Arctic |
op_source |
Annales Geophysicae, Vol 22, Pp 4049-4059 (2004) |
op_relation |
https://www.ann-geophys.net/22/4049/2004/angeo-22-4049-2004.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-22-4049-2004 0992-7689 1432-0576 https://doaj.org/article/c495430ceb9447deb974290b60e07bae |
op_doi |
https://doi.org/10.5194/angeo-22-4049-2004 |
container_title |
Annales Geophysicae |
container_volume |
22 |
container_issue |
12 |
container_start_page |
4049 |
op_container_end_page |
4059 |
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1766253528998739968 |