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  Ca+ ion layer observed by a resonance scattering lidar at Syowa in the Antarctic

Ejiri, M. K., Nishiyama, T., Tsuda, T. T., Tsutsumi, M., Tsuno, K., Makoto, A., Takuya D, K., Ogawa, T., Satoshi, W., Nakamura, T. (2023): Ca+ ion layer observed by a resonance scattering lidar at Syowa in the Antarctic, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-4260

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Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021697 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021697_1
Genre: Conference Paper

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 Creators:
Ejiri, Mitsumu K.1, Author
Nishiyama, Takanori1, Author
Tsuda, Takuo T.1, Author
Tsutsumi, Masaki1, Author
Tsuno, Katsuhiko1, Author
Makoto, Abo1, Author
Takuya D, Kawahara1, Author
Ogawa, Takayo1, Author
Satoshi, Wada1, Author
Nakamura, Takuji1, Author
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

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 Abstract: 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.

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Language(s): eng - English
 Dates: 2023-07-112023-07-11
 Publication Status: Finally published
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 Identifiers: DOI: 10.57757/IUGG23-4260
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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Place of Event: Berlin
Start-/End Date: 2023-07-11 - 2023-07-20

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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Source Genre: Proceedings
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Publ. Info: Potsdam : GFZ German Research Centre for Geosciences
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