First Simultaneous Lidar Observations of Thermosphere‐Ionosphere Fe and Na (TIFe and TINa) Layers at McMurdo (77.84°S, 166.67°E), Antarctica With Concurrent Measurements of Aurora Activity, Enhanced Ionization Layers, and Converging Electric Field
We report the first simultaneous, common‐volume lidar observations of thermosphere‐ionosphere Fe (TIFe) and Na (TINa) layers in Antarctica. We also report the observational discovery of nearly one‐to‐one correspondence between TIFe and aurora activity, enhanced ionization layers, and converging elec...
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Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7685115/ https://doi.org/10.1029/2020GL090181 |
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ftpubmed:oai:pubmedcentral.nih.gov:7685115 2023-05-15T13:46:03+02:00 First Simultaneous Lidar Observations of Thermosphere‐Ionosphere Fe and Na (TIFe and TINa) Layers at McMurdo (77.84°S, 166.67°E), Antarctica With Concurrent Measurements of Aurora Activity, Enhanced Ionization Layers, and Converging Electric Field Chu, Xinzhao Nishimura, Yukitoshi Xu, Zhonghua Yu, Zhibin Plane, John M. C. Gardner, Chester S. Ogawa, Yasunobu 2020-10-19 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7685115/ https://doi.org/10.1029/2020GL090181 en eng John Wiley and Sons Inc. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7685115/ http://dx.doi.org/10.1029/2020GL090181 ©2020. The Authors. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. CC-BY Geophys Res Lett Research Letters Text 2020 ftpubmed https://doi.org/10.1029/2020GL090181 2020-12-06T01:40:21Z We report the first simultaneous, common‐volume lidar observations of thermosphere‐ionosphere Fe (TIFe) and Na (TINa) layers in Antarctica. We also report the observational discovery of nearly one‐to‐one correspondence between TIFe and aurora activity, enhanced ionization layers, and converging electric fields. Distinctive TIFe layers have a peak density of ~384 cm(−3) and the TIFe mixing ratio peaks around 123 km, ~5 times the mesospheric layer maximum. All evidence shows that Fe(+) ion‐neutralization is the major formation mechanism of TIFe layers. The TINa mixing ratio often exhibits a broad peak at TIFe altitudes, providing evidence for in situ production via Na(+) neutralization. However, the tenuous TINa layers persist long beyond TIFe disappearance and reveal gravity wave perturbations, suggesting a dynamic background of neutral Na, but not Fe, above 110 km. The striking differences between distinct TIFe and diffuse TINa suggest differential transport between Fe and Na, possibly due to mass separation. Text Antarc* Antarctica E. Antarctica PubMed Central (PMC) Broad Peak ENVELOPE(-71.231,-71.231,70.495,70.495) Geophysical Research Letters 47 20 |
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PubMed Central (PMC) |
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language |
English |
topic |
Research Letters |
spellingShingle |
Research Letters Chu, Xinzhao Nishimura, Yukitoshi Xu, Zhonghua Yu, Zhibin Plane, John M. C. Gardner, Chester S. Ogawa, Yasunobu First Simultaneous Lidar Observations of Thermosphere‐Ionosphere Fe and Na (TIFe and TINa) Layers at McMurdo (77.84°S, 166.67°E), Antarctica With Concurrent Measurements of Aurora Activity, Enhanced Ionization Layers, and Converging Electric Field |
topic_facet |
Research Letters |
description |
We report the first simultaneous, common‐volume lidar observations of thermosphere‐ionosphere Fe (TIFe) and Na (TINa) layers in Antarctica. We also report the observational discovery of nearly one‐to‐one correspondence between TIFe and aurora activity, enhanced ionization layers, and converging electric fields. Distinctive TIFe layers have a peak density of ~384 cm(−3) and the TIFe mixing ratio peaks around 123 km, ~5 times the mesospheric layer maximum. All evidence shows that Fe(+) ion‐neutralization is the major formation mechanism of TIFe layers. The TINa mixing ratio often exhibits a broad peak at TIFe altitudes, providing evidence for in situ production via Na(+) neutralization. However, the tenuous TINa layers persist long beyond TIFe disappearance and reveal gravity wave perturbations, suggesting a dynamic background of neutral Na, but not Fe, above 110 km. The striking differences between distinct TIFe and diffuse TINa suggest differential transport between Fe and Na, possibly due to mass separation. |
format |
Text |
author |
Chu, Xinzhao Nishimura, Yukitoshi Xu, Zhonghua Yu, Zhibin Plane, John M. C. Gardner, Chester S. Ogawa, Yasunobu |
author_facet |
Chu, Xinzhao Nishimura, Yukitoshi Xu, Zhonghua Yu, Zhibin Plane, John M. C. Gardner, Chester S. Ogawa, Yasunobu |
author_sort |
Chu, Xinzhao |
title |
First Simultaneous Lidar Observations of Thermosphere‐Ionosphere Fe and Na (TIFe and TINa) Layers at McMurdo (77.84°S, 166.67°E), Antarctica With Concurrent Measurements of Aurora Activity, Enhanced Ionization Layers, and Converging Electric Field |
title_short |
First Simultaneous Lidar Observations of Thermosphere‐Ionosphere Fe and Na (TIFe and TINa) Layers at McMurdo (77.84°S, 166.67°E), Antarctica With Concurrent Measurements of Aurora Activity, Enhanced Ionization Layers, and Converging Electric Field |
title_full |
First Simultaneous Lidar Observations of Thermosphere‐Ionosphere Fe and Na (TIFe and TINa) Layers at McMurdo (77.84°S, 166.67°E), Antarctica With Concurrent Measurements of Aurora Activity, Enhanced Ionization Layers, and Converging Electric Field |
title_fullStr |
First Simultaneous Lidar Observations of Thermosphere‐Ionosphere Fe and Na (TIFe and TINa) Layers at McMurdo (77.84°S, 166.67°E), Antarctica With Concurrent Measurements of Aurora Activity, Enhanced Ionization Layers, and Converging Electric Field |
title_full_unstemmed |
First Simultaneous Lidar Observations of Thermosphere‐Ionosphere Fe and Na (TIFe and TINa) Layers at McMurdo (77.84°S, 166.67°E), Antarctica With Concurrent Measurements of Aurora Activity, Enhanced Ionization Layers, and Converging Electric Field |
title_sort |
first simultaneous lidar observations of thermosphere‐ionosphere fe and na (tife and tina) layers at mcmurdo (77.84°s, 166.67°e), antarctica with concurrent measurements of aurora activity, enhanced ionization layers, and converging electric field |
publisher |
John Wiley and Sons Inc. |
publishDate |
2020 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7685115/ https://doi.org/10.1029/2020GL090181 |
long_lat |
ENVELOPE(-71.231,-71.231,70.495,70.495) |
geographic |
Broad Peak |
geographic_facet |
Broad Peak |
genre |
Antarc* Antarctica E. Antarctica |
genre_facet |
Antarc* Antarctica E. Antarctica |
op_source |
Geophys Res Lett |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7685115/ http://dx.doi.org/10.1029/2020GL090181 |
op_rights |
©2020. The Authors. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2020GL090181 |
container_title |
Geophysical Research Letters |
container_volume |
47 |
container_issue |
20 |
_version_ |
1766235456436961280 |