Ca+ ion layer observed by a resonance scattering lidar at Syowa in the Antarctic
Layers of metal ions in the mesosphere and lower-thermosphere (MLT) are produced by meteoric ablation. The meteoric metal ions have relatively long chemical lifetime in the MLT region and behave as plasma affected by neutral atmosphere dynamics. Ca + is one of meteoric metal ion and only one ion, wh...
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5021697 2023-07-30T03:59:28+02:00 Ca+ ion layer observed by a resonance scattering lidar at Syowa in the Antarctic Ejiri, M. Nishiyama, T. Tsuda, T. Tsutsumi, M. Tsuno, K. Makoto, A. Takuya D, K. Ogawa, T. Satoshi, W. Nakamura, T. 2023-07-11 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021697 eng eng info:eu-repo/semantics/altIdentifier/doi/10.57757/IUGG23-4260 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021697 XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) info:eu-repo/semantics/conferenceObject 2023 ftgfzpotsdam https://doi.org/10.57757/IUGG23-4260 2023-07-16T23:40:25Z Layers of metal ions in the mesosphere and lower-thermosphere (MLT) are produced by meteoric ablation. The meteoric metal ions have relatively long chemical lifetime in the MLT region and behave as plasma affected by neutral atmosphere dynamics. Ca + is one of meteoric metal ion and only one ion, which can be measured its vertical profile from the ground by a lidar sounding. Ca + lidar observations have been conducted at the low and mid latitudes in the northern hemisphere only. A resonance scattering lidar developed by the National Institute of Polar Research (NIPR) was installed at Syowa (69S, 40E), Antarctic in 2017 and successfully obtained Ca + density profiles 6 nights in total in Spring of 2017 and 2018. The averaged Ca + layer observed at Syowa were with a FWHM of ~7 km, peak altitude of ~94 km, and peak density of ~10 cm -3 . The Ca + layers were observed in the main supply height region by meteor, however the layer was not always existing but sometimes disappeared. Temporal variation of Ca + density is compared with meteoric, geomagnetic, and gravity wave activities. In this presentation, we will discuss a main reason of Ca + layer disappearance with considering chemical lifetime of Ca + below 100 km. Conference Object Antarc* Antarctic National Institute of Polar Research GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Antarctic The Antarctic |
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Open Polar |
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GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
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ftgfzpotsdam |
language |
English |
description |
Layers of metal ions in the mesosphere and lower-thermosphere (MLT) are produced by meteoric ablation. The meteoric metal ions have relatively long chemical lifetime in the MLT region and behave as plasma affected by neutral atmosphere dynamics. Ca + is one of meteoric metal ion and only one ion, which can be measured its vertical profile from the ground by a lidar sounding. Ca + lidar observations have been conducted at the low and mid latitudes in the northern hemisphere only. A resonance scattering lidar developed by the National Institute of Polar Research (NIPR) was installed at Syowa (69S, 40E), Antarctic in 2017 and successfully obtained Ca + density profiles 6 nights in total in Spring of 2017 and 2018. The averaged Ca + layer observed at Syowa were with a FWHM of ~7 km, peak altitude of ~94 km, and peak density of ~10 cm -3 . The Ca + layers were observed in the main supply height region by meteor, however the layer was not always existing but sometimes disappeared. Temporal variation of Ca + density is compared with meteoric, geomagnetic, and gravity wave activities. In this presentation, we will discuss a main reason of Ca + layer disappearance with considering chemical lifetime of Ca + below 100 km. |
format |
Conference Object |
author |
Ejiri, M. Nishiyama, T. Tsuda, T. Tsutsumi, M. Tsuno, K. Makoto, A. Takuya D, K. Ogawa, T. Satoshi, W. Nakamura, T. |
spellingShingle |
Ejiri, M. Nishiyama, T. Tsuda, T. Tsutsumi, M. Tsuno, K. Makoto, A. Takuya D, K. Ogawa, T. Satoshi, W. Nakamura, T. Ca+ ion layer observed by a resonance scattering lidar at Syowa in the Antarctic |
author_facet |
Ejiri, M. Nishiyama, T. Tsuda, T. Tsutsumi, M. Tsuno, K. Makoto, A. Takuya D, K. Ogawa, T. Satoshi, W. Nakamura, T. |
author_sort |
Ejiri, M. |
title |
Ca+ ion layer observed by a resonance scattering lidar at Syowa in the Antarctic |
title_short |
Ca+ ion layer observed by a resonance scattering lidar at Syowa in the Antarctic |
title_full |
Ca+ ion layer observed by a resonance scattering lidar at Syowa in the Antarctic |
title_fullStr |
Ca+ ion layer observed by a resonance scattering lidar at Syowa in the Antarctic |
title_full_unstemmed |
Ca+ ion layer observed by a resonance scattering lidar at Syowa in the Antarctic |
title_sort |
ca+ ion layer observed by a resonance scattering lidar at syowa in the antarctic |
publishDate |
2023 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021697 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic National Institute of Polar Research |
genre_facet |
Antarc* Antarctic National Institute of Polar Research |
op_source |
XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.57757/IUGG23-4260 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021697 |
op_doi |
https://doi.org/10.57757/IUGG23-4260 |
_version_ |
1772810307597500416 |