Characteristics of the layered polar mesosphere summer echoes occurrence ratio observed by EISCAT VHF 224 MHz radar
Polar mesosphere summer echoes (PMSEs) are strong radar echoes observed in the polar mesopause during the local summer. Observations of layered PMSEs carried out by the European Incoherent Scatter Scientific Association very-high-frequency (EISCAT VHF) radar during 2004–2015 in the latest solar cycl...
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ftdoajarticles:oai:doaj.org/article:6413c9801893481e972aa8b5de3f6efd 2023-05-15T16:04:34+02:00 Characteristics of the layered polar mesosphere summer echoes occurrence ratio observed by EISCAT VHF 224 MHz radar S. Ge H. Li T. Xu M. Zhu M. Wang L. Meng S. Ullah A. Rauf 2019-06-01T00:00:00Z https://doi.org/10.5194/angeo-37-417-2019 https://doaj.org/article/6413c9801893481e972aa8b5de3f6efd EN eng Copernicus Publications https://www.ann-geophys.net/37/417/2019/angeo-37-417-2019.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-37-417-2019 0992-7689 1432-0576 https://doaj.org/article/6413c9801893481e972aa8b5de3f6efd Annales Geophysicae, Vol 37, Pp 417-427 (2019) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2019 ftdoajarticles https://doi.org/10.5194/angeo-37-417-2019 2022-12-31T00:22:51Z Polar mesosphere summer echoes (PMSEs) are strong radar echoes observed in the polar mesopause during the local summer. Observations of layered PMSEs carried out by the European Incoherent Scatter Scientific Association very-high-frequency (EISCAT VHF) radar during 2004–2015 in the latest solar cycle are used to study the variations of the PMSE occurrence ratio (OR). Different seasonal behavior of PMSEs is found by analyzing the seasonal variation of PMSE mono-, double-, and tri-layer OR. A method was used to calculate the PMSE mono, double-, and tri-layer OR under a different electron density threshold. In addition, a method to analyze the correlation of the layered PMSE OR with the solar 10.7 cm flux index (F10.7) and geomagnetic K index is proposed. Based on it, the correlation of the layered PMSE OR with solar and geomagnetic activities is not expected to be affected by discontinuous PMSEs. It is found that PMSE mono-, double-, and tri-layer ORs are positively correlated with the K index. The correlation of the PMSE mono- and double-layer OR with F10.7 is weak, whereas the PMSE tri-layer OR shows a negative correlation with F10.7. Article in Journal/Newspaper EISCAT Directory of Open Access Journals: DOAJ Articles Annales Geophysicae 37 3 417 427 |
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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 S. Ge H. Li T. Xu M. Zhu M. Wang L. Meng S. Ullah A. Rauf Characteristics of the layered polar mesosphere summer echoes occurrence ratio observed by EISCAT VHF 224 MHz radar |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
Polar mesosphere summer echoes (PMSEs) are strong radar echoes observed in the polar mesopause during the local summer. Observations of layered PMSEs carried out by the European Incoherent Scatter Scientific Association very-high-frequency (EISCAT VHF) radar during 2004–2015 in the latest solar cycle are used to study the variations of the PMSE occurrence ratio (OR). Different seasonal behavior of PMSEs is found by analyzing the seasonal variation of PMSE mono-, double-, and tri-layer OR. A method was used to calculate the PMSE mono, double-, and tri-layer OR under a different electron density threshold. In addition, a method to analyze the correlation of the layered PMSE OR with the solar 10.7 cm flux index (F10.7) and geomagnetic K index is proposed. Based on it, the correlation of the layered PMSE OR with solar and geomagnetic activities is not expected to be affected by discontinuous PMSEs. It is found that PMSE mono-, double-, and tri-layer ORs are positively correlated with the K index. The correlation of the PMSE mono- and double-layer OR with F10.7 is weak, whereas the PMSE tri-layer OR shows a negative correlation with F10.7. |
format |
Article in Journal/Newspaper |
author |
S. Ge H. Li T. Xu M. Zhu M. Wang L. Meng S. Ullah A. Rauf |
author_facet |
S. Ge H. Li T. Xu M. Zhu M. Wang L. Meng S. Ullah A. Rauf |
author_sort |
S. Ge |
title |
Characteristics of the layered polar mesosphere summer echoes occurrence ratio observed by EISCAT VHF 224 MHz radar |
title_short |
Characteristics of the layered polar mesosphere summer echoes occurrence ratio observed by EISCAT VHF 224 MHz radar |
title_full |
Characteristics of the layered polar mesosphere summer echoes occurrence ratio observed by EISCAT VHF 224 MHz radar |
title_fullStr |
Characteristics of the layered polar mesosphere summer echoes occurrence ratio observed by EISCAT VHF 224 MHz radar |
title_full_unstemmed |
Characteristics of the layered polar mesosphere summer echoes occurrence ratio observed by EISCAT VHF 224 MHz radar |
title_sort |
characteristics of the layered polar mesosphere summer echoes occurrence ratio observed by eiscat vhf 224 mhz radar |
publisher |
Copernicus Publications |
publishDate |
2019 |
url |
https://doi.org/10.5194/angeo-37-417-2019 https://doaj.org/article/6413c9801893481e972aa8b5de3f6efd |
genre |
EISCAT |
genre_facet |
EISCAT |
op_source |
Annales Geophysicae, Vol 37, Pp 417-427 (2019) |
op_relation |
https://www.ann-geophys.net/37/417/2019/angeo-37-417-2019.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-37-417-2019 0992-7689 1432-0576 https://doaj.org/article/6413c9801893481e972aa8b5de3f6efd |
op_doi |
https://doi.org/10.5194/angeo-37-417-2019 |
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Annales Geophysicae |
container_volume |
37 |
container_issue |
3 |
container_start_page |
417 |
op_container_end_page |
427 |
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1766400152696782848 |