Statistical Analysis of Polar Mesosphere Summer Echoes with Super Dual Auroral Radar Network
Polar Mesosphere Summer Echoes (PMSE), which are regularly observed in summer months at polar latitudes, are strong radar backscatter from the upper mesosphere. They have been studied with ground-based radars whose frequency ranges from VHF to UHF. Recently, peculiar echos, which are interpreted as...
Main Authors: | , , , |
---|---|
Format: | Report |
Language: | English |
Published: |
2005
|
Subjects: | |
Online Access: | https://uec.repo.nii.ac.jp/?action=repository_uri&item_id=8389 http://id.nii.ac.jp/1438/00008378/ |
id |
ftcrecs:oai:uec.repo.nii.ac.jp:00008389 |
---|---|
record_format |
openpolar |
spelling |
ftcrecs:oai:uec.repo.nii.ac.jp:00008389 2023-06-11T04:05:15+02:00 Statistical Analysis of Polar Mesosphere Summer Echoes with Super Dual Auroral Radar Network Hosokawa Keisuke Ogawa Tadahiko Sato Natsuo Yukimatu Akira Sessai 2005-01-31 https://uec.repo.nii.ac.jp/?action=repository_uri&item_id=8389 http://id.nii.ac.jp/1438/00008378/ en eng https://uec.repo.nii.ac.jp/?action=repository_uri&item_id=8389 http://id.nii.ac.jp/1438/00008378/ 電気通信大学紀要 = Bulletin of the University of Electro-Communications, 17(1-2), 45-52(2005-01-31) 09150935 AN10016842 Upper Atmosphere Radio Observation Global Climate Change Departmental Bulletin Paper 2005 ftcrecs 2023-04-29T19:30:33Z Polar Mesosphere Summer Echoes (PMSE), which are regularly observed in summer months at polar latitudes, are strong radar backscatter from the upper mesosphere. They have been studied with ground-based radars whose frequency ranges from VHF to UHF. Recently, peculiar echos, which are interpreted as PMSE, were found to appear in the near range observations of Super Dual Auroral Radar Network (SuperDARN). This suggests a possibility that SuperDARN becomes a powerful tool for studying PMSE as a global scale phenomenon. In this paper, we statistically analysed occurrence frequency of the near backscatter echoes using two years measurements of the SuperDARN radars in Antarctica and Iceland. Occurrence percentage of the near range backscatter is enhanced significantly in summer months. Maximum is located at the summer solstice, where occurrence percentage reaches 80-90 % in Iceland and 70-80 % in Antarctica. Local time distribution of the echo occurrence has its maximum around local noon and minimum at 20LT. These characteristics of the near range echoes are quite similar to those of PMSE at VHF frequencies, which implies that near range observation of SuperDARN contains huge amount of PMSE. Interhemispheric difference of the echo occurrence probabilities are also estimated. Occurrence percentage averaged over summer months is 1.5 times larger in the Northern Hemisphere than that in the Southern Hemisphere, suggesting that occurrence of PMSE has actually an interhemispheric asymmetry. However, degree of interhemispheric asymmetry is much smaller than that predicted from the earlier VHF radar observation. Report Antarc* Antarctica Iceland C-RECS (Creative - Repository of Electro Communications) |
institution |
Open Polar |
collection |
C-RECS (Creative - Repository of Electro Communications) |
op_collection_id |
ftcrecs |
language |
English |
topic |
Upper Atmosphere Radio Observation Global Climate Change |
spellingShingle |
Upper Atmosphere Radio Observation Global Climate Change Hosokawa Keisuke Ogawa Tadahiko Sato Natsuo Yukimatu Akira Sessai Statistical Analysis of Polar Mesosphere Summer Echoes with Super Dual Auroral Radar Network |
topic_facet |
Upper Atmosphere Radio Observation Global Climate Change |
description |
Polar Mesosphere Summer Echoes (PMSE), which are regularly observed in summer months at polar latitudes, are strong radar backscatter from the upper mesosphere. They have been studied with ground-based radars whose frequency ranges from VHF to UHF. Recently, peculiar echos, which are interpreted as PMSE, were found to appear in the near range observations of Super Dual Auroral Radar Network (SuperDARN). This suggests a possibility that SuperDARN becomes a powerful tool for studying PMSE as a global scale phenomenon. In this paper, we statistically analysed occurrence frequency of the near backscatter echoes using two years measurements of the SuperDARN radars in Antarctica and Iceland. Occurrence percentage of the near range backscatter is enhanced significantly in summer months. Maximum is located at the summer solstice, where occurrence percentage reaches 80-90 % in Iceland and 70-80 % in Antarctica. Local time distribution of the echo occurrence has its maximum around local noon and minimum at 20LT. These characteristics of the near range echoes are quite similar to those of PMSE at VHF frequencies, which implies that near range observation of SuperDARN contains huge amount of PMSE. Interhemispheric difference of the echo occurrence probabilities are also estimated. Occurrence percentage averaged over summer months is 1.5 times larger in the Northern Hemisphere than that in the Southern Hemisphere, suggesting that occurrence of PMSE has actually an interhemispheric asymmetry. However, degree of interhemispheric asymmetry is much smaller than that predicted from the earlier VHF radar observation. |
format |
Report |
author |
Hosokawa Keisuke Ogawa Tadahiko Sato Natsuo Yukimatu Akira Sessai |
author_facet |
Hosokawa Keisuke Ogawa Tadahiko Sato Natsuo Yukimatu Akira Sessai |
author_sort |
Hosokawa Keisuke |
title |
Statistical Analysis of Polar Mesosphere Summer Echoes with Super Dual Auroral Radar Network |
title_short |
Statistical Analysis of Polar Mesosphere Summer Echoes with Super Dual Auroral Radar Network |
title_full |
Statistical Analysis of Polar Mesosphere Summer Echoes with Super Dual Auroral Radar Network |
title_fullStr |
Statistical Analysis of Polar Mesosphere Summer Echoes with Super Dual Auroral Radar Network |
title_full_unstemmed |
Statistical Analysis of Polar Mesosphere Summer Echoes with Super Dual Auroral Radar Network |
title_sort |
statistical analysis of polar mesosphere summer echoes with super dual auroral radar network |
publishDate |
2005 |
url |
https://uec.repo.nii.ac.jp/?action=repository_uri&item_id=8389 http://id.nii.ac.jp/1438/00008378/ |
genre |
Antarc* Antarctica Iceland |
genre_facet |
Antarc* Antarctica Iceland |
op_relation |
https://uec.repo.nii.ac.jp/?action=repository_uri&item_id=8389 http://id.nii.ac.jp/1438/00008378/ 電気通信大学紀要 = Bulletin of the University of Electro-Communications, 17(1-2), 45-52(2005-01-31) 09150935 AN10016842 |
_version_ |
1768373353343614976 |