Relationship between Na layer and CNA variations observed at Syowa, Antarctic
Abstract We have performed a statistical data analysis on relationship between simultaneous Na density data and cosmic noise absorption (CNA) data, which is an indicator for energetic particle precipitation, obtained at Syowa, Antarctic in 2000–2002. It is found that the Na densities around the tops...
Published in: | Earth, Planets and Space |
---|---|
Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
SpringerOpen
2021
|
Subjects: | |
Online Access: | https://doi.org/10.1186/s40623-020-01335-7 https://doaj.org/article/15cbe0ed2a6946418b0c0c41bb3c1b52 |
id |
ftdoajarticles:oai:doaj.org/article:15cbe0ed2a6946418b0c0c41bb3c1b52 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:15cbe0ed2a6946418b0c0c41bb3c1b52 2023-05-15T13:46:26+02:00 Relationship between Na layer and CNA variations observed at Syowa, Antarctic T. T. Tsuda Y. -M. Tanaka R. Tozu K. Takizawa M. K. Ejiri T. Nishiyama T. D. Kawahara T. Nakamura 2021-01-01T00:00:00Z https://doi.org/10.1186/s40623-020-01335-7 https://doaj.org/article/15cbe0ed2a6946418b0c0c41bb3c1b52 EN eng SpringerOpen https://doi.org/10.1186/s40623-020-01335-7 https://doaj.org/toc/1880-5981 doi:10.1186/s40623-020-01335-7 1880-5981 https://doaj.org/article/15cbe0ed2a6946418b0c0c41bb3c1b52 Earth, Planets and Space, Vol 73, Iss 1, Pp 1-10 (2021) Na layer CNA Energetic particle precipitation Geomagnetic activity Polar region Syowa Geography. Anthropology. Recreation G Geodesy QB275-343 Geology QE1-996.5 article 2021 ftdoajarticles https://doi.org/10.1186/s40623-020-01335-7 2022-12-31T12:08:25Z Abstract We have performed a statistical data analysis on relationship between simultaneous Na density data and cosmic noise absorption (CNA) data, which is an indicator for energetic particle precipitation, obtained at Syowa, Antarctic in 2000–2002. It is found that the Na densities around the topside of Na layers (above $$\sim 95 \,\hbox {km}$$ ∼ 95 km height) tended to be smaller when the CNA was larger. The amounts of Na density responses, i.e., Na density decrease or Na loss, were increasing with magnetic local time (MLT) from dusk hours to dawn hours, and those of CNA responses, i.e., CNA increase, were also increasing with MLT. Thus, there were clear negative correlations between the Na density and CNA variations. These results indicate that the Na loss around the topside of Na layer would be induced by the energetic particle precipitation, and its effect would be more severe in dawn hours. Article in Journal/Newspaper Antarc* Antarctic Directory of Open Access Journals: DOAJ Articles Antarctic Earth, Planets and Space 73 1 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Na layer CNA Energetic particle precipitation Geomagnetic activity Polar region Syowa Geography. Anthropology. Recreation G Geodesy QB275-343 Geology QE1-996.5 |
spellingShingle |
Na layer CNA Energetic particle precipitation Geomagnetic activity Polar region Syowa Geography. Anthropology. Recreation G Geodesy QB275-343 Geology QE1-996.5 T. T. Tsuda Y. -M. Tanaka R. Tozu K. Takizawa M. K. Ejiri T. Nishiyama T. D. Kawahara T. Nakamura Relationship between Na layer and CNA variations observed at Syowa, Antarctic |
topic_facet |
Na layer CNA Energetic particle precipitation Geomagnetic activity Polar region Syowa Geography. Anthropology. Recreation G Geodesy QB275-343 Geology QE1-996.5 |
description |
Abstract We have performed a statistical data analysis on relationship between simultaneous Na density data and cosmic noise absorption (CNA) data, which is an indicator for energetic particle precipitation, obtained at Syowa, Antarctic in 2000–2002. It is found that the Na densities around the topside of Na layers (above $$\sim 95 \,\hbox {km}$$ ∼ 95 km height) tended to be smaller when the CNA was larger. The amounts of Na density responses, i.e., Na density decrease or Na loss, were increasing with magnetic local time (MLT) from dusk hours to dawn hours, and those of CNA responses, i.e., CNA increase, were also increasing with MLT. Thus, there were clear negative correlations between the Na density and CNA variations. These results indicate that the Na loss around the topside of Na layer would be induced by the energetic particle precipitation, and its effect would be more severe in dawn hours. |
format |
Article in Journal/Newspaper |
author |
T. T. Tsuda Y. -M. Tanaka R. Tozu K. Takizawa M. K. Ejiri T. Nishiyama T. D. Kawahara T. Nakamura |
author_facet |
T. T. Tsuda Y. -M. Tanaka R. Tozu K. Takizawa M. K. Ejiri T. Nishiyama T. D. Kawahara T. Nakamura |
author_sort |
T. T. Tsuda |
title |
Relationship between Na layer and CNA variations observed at Syowa, Antarctic |
title_short |
Relationship between Na layer and CNA variations observed at Syowa, Antarctic |
title_full |
Relationship between Na layer and CNA variations observed at Syowa, Antarctic |
title_fullStr |
Relationship between Na layer and CNA variations observed at Syowa, Antarctic |
title_full_unstemmed |
Relationship between Na layer and CNA variations observed at Syowa, Antarctic |
title_sort |
relationship between na layer and cna variations observed at syowa, antarctic |
publisher |
SpringerOpen |
publishDate |
2021 |
url |
https://doi.org/10.1186/s40623-020-01335-7 https://doaj.org/article/15cbe0ed2a6946418b0c0c41bb3c1b52 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Earth, Planets and Space, Vol 73, Iss 1, Pp 1-10 (2021) |
op_relation |
https://doi.org/10.1186/s40623-020-01335-7 https://doaj.org/toc/1880-5981 doi:10.1186/s40623-020-01335-7 1880-5981 https://doaj.org/article/15cbe0ed2a6946418b0c0c41bb3c1b52 |
op_doi |
https://doi.org/10.1186/s40623-020-01335-7 |
container_title |
Earth, Planets and Space |
container_volume |
73 |
container_issue |
1 |
_version_ |
1766242516276871168 |