Temporal evolutions of $$\text {N}_2^+$$ N 2 + Meinel (1,2) band near $$1.5.\,\upmu \text {m}$$ 1.5 . μ m associated with aurora breakup and their effects on mesopause temperature estimations from OH Meinel (3,1) band
Abstract We have carried out ground-based NIRAS (Near-InfraRed Aurora and airglow Spectrograph) observations at Syowa station, Antarctic ( $$69.0^{\circ }\text {S}$$ 69 . 0 ∘ S , $$39.6^{\circ }\text {E}$$ 39 . 6 ∘ E ) and Kiruna ( $$67.8^{\circ }\text {N}$$ 67 . 8 ∘ N , $$20.4^{\circ }\text {E}$$ 2...
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ftdoajarticles:oai:doaj.org/article:ee2690c688ff4c12a700f033f34c4393 2023-05-15T13:59:09+02:00 Temporal evolutions of $$\text {N}_2^+$$ N 2 + Meinel (1,2) band near $$1.5.\,\upmu \text {m}$$ 1.5 . μ m associated with aurora breakup and their effects on mesopause temperature estimations from OH Meinel (3,1) band Takanori Nishiyama Makoto Taguchi Hidehiko Suzuki Peter Dalin Yasunobu Ogawa Urban Brändström Takeshi Sakanoi 2021-01-01T00:00:00Z https://doi.org/10.1186/s40623-021-01360-0 https://doaj.org/article/ee2690c688ff4c12a700f033f34c4393 EN eng SpringerOpen https://doi.org/10.1186/s40623-021-01360-0 https://doaj.org/toc/1880-5981 doi:10.1186/s40623-021-01360-0 1880-5981 https://doaj.org/article/ee2690c688ff4c12a700f033f34c4393 Earth, Planets and Space, Vol 73, Iss 1, Pp 1-12 (2021) Ground-based spectroscopic observations OH airglow Aurora The Mesosphere and Lower Thermosphere OH rotational temperature Short wavelength infrared Geography. Anthropology. Recreation G Geodesy QB275-343 Geology QE1-996.5 article 2021 ftdoajarticles https://doi.org/10.1186/s40623-021-01360-0 2022-12-31T11:01:20Z Abstract We have carried out ground-based NIRAS (Near-InfraRed Aurora and airglow Spectrograph) observations at Syowa station, Antarctic ( $$69.0^{\circ }\text {S}$$ 69 . 0 ∘ S , $$39.6^{\circ }\text {E}$$ 39 . 6 ∘ E ) and Kiruna ( $$67.8^{\circ }\text {N}$$ 67 . 8 ∘ N , $$20.4^{\circ }\text {E}$$ 20 . 4 ∘ E ), Sweden for continuous measurements of hydroxyl (OH) rotational temperatures and a precise evaluation of auroral contaminations to OH Meinel (3,1) band. A total of 368-nights observations succeeded for 2 winter seasons, and 3 cases in which $$\text {N}_2^+$$ N 2 + Meinel (1,2) band around $$1.5\,\mu \text {m}$$ 1.5 μ m was significant were identified. Focusing on two specific cases, detailed spectral characteristics with high temporal resolutions of 30 s are presented. Intensities of $$\text {N}_2^+$$ N 2 + band were estimated to be 228 kR and 217 kR just at the moment of the aurora breakup and arc intensification during pseudo breakup, respectively. At a wavelength of $$\text {P}_1(2)$$ P 1 ( 2 ) line ( $$\sim 1523 \,\text {nm}$$ ∼ 1523 nm ), $$\text {N}_2^+$$ N 2 + emissions were almost equal to or greater than the OH line intensity. On the other hand, at a wavelength of $$\text {P}_1(4)$$ P 1 ( 4 ) line ( $$\sim 1542 \,\text {nm}$$ ∼ 1542 nm ), the OH line was not seriously contaminated and still dominant to $$\text {N}_2^+$$ N 2 + emissions. Furthermore, we evaluated $$\text {N}_2^+$$ N 2 + (1,2) band effects on OH rotational temperature estimations quantitatively for the first time. Auroral contaminations from $$\text {N}_2^+$$ N 2 + (1,2) band basically lead negative bias in OH rotational temperature estimated by line-pair-ratio method with $$\text {P}_1(2)$$ P 1 ( 2 ) and $$\text {P}_1(4)$$ P 1 ( 4 ) lines in OH (3,1) band. They possibly cause underestimations of OH rotational temperatures up to 40 K. In addition, $$\text {N}_2^+$$ N 2 + (1,2) band contaminations were temporally limited to a moment around the aurora breakup. This is consistent with proceeding studies reporting that enhancements of ... Article in Journal/Newspaper Antarc* Antarctic Kiruna Directory of Open Access Journals: DOAJ Articles Antarctic Kiruna Syowa Station Earth, Planets and Space 73 1 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ground-based spectroscopic observations OH airglow Aurora The Mesosphere and Lower Thermosphere OH rotational temperature Short wavelength infrared Geography. Anthropology. Recreation G Geodesy QB275-343 Geology QE1-996.5 |
spellingShingle |
Ground-based spectroscopic observations OH airglow Aurora The Mesosphere and Lower Thermosphere OH rotational temperature Short wavelength infrared Geography. Anthropology. Recreation G Geodesy QB275-343 Geology QE1-996.5 Takanori Nishiyama Makoto Taguchi Hidehiko Suzuki Peter Dalin Yasunobu Ogawa Urban Brändström Takeshi Sakanoi Temporal evolutions of $$\text {N}_2^+$$ N 2 + Meinel (1,2) band near $$1.5.\,\upmu \text {m}$$ 1.5 . μ m associated with aurora breakup and their effects on mesopause temperature estimations from OH Meinel (3,1) band |
topic_facet |
Ground-based spectroscopic observations OH airglow Aurora The Mesosphere and Lower Thermosphere OH rotational temperature Short wavelength infrared Geography. Anthropology. Recreation G Geodesy QB275-343 Geology QE1-996.5 |
description |
Abstract We have carried out ground-based NIRAS (Near-InfraRed Aurora and airglow Spectrograph) observations at Syowa station, Antarctic ( $$69.0^{\circ }\text {S}$$ 69 . 0 ∘ S , $$39.6^{\circ }\text {E}$$ 39 . 6 ∘ E ) and Kiruna ( $$67.8^{\circ }\text {N}$$ 67 . 8 ∘ N , $$20.4^{\circ }\text {E}$$ 20 . 4 ∘ E ), Sweden for continuous measurements of hydroxyl (OH) rotational temperatures and a precise evaluation of auroral contaminations to OH Meinel (3,1) band. A total of 368-nights observations succeeded for 2 winter seasons, and 3 cases in which $$\text {N}_2^+$$ N 2 + Meinel (1,2) band around $$1.5\,\mu \text {m}$$ 1.5 μ m was significant were identified. Focusing on two specific cases, detailed spectral characteristics with high temporal resolutions of 30 s are presented. Intensities of $$\text {N}_2^+$$ N 2 + band were estimated to be 228 kR and 217 kR just at the moment of the aurora breakup and arc intensification during pseudo breakup, respectively. At a wavelength of $$\text {P}_1(2)$$ P 1 ( 2 ) line ( $$\sim 1523 \,\text {nm}$$ ∼ 1523 nm ), $$\text {N}_2^+$$ N 2 + emissions were almost equal to or greater than the OH line intensity. On the other hand, at a wavelength of $$\text {P}_1(4)$$ P 1 ( 4 ) line ( $$\sim 1542 \,\text {nm}$$ ∼ 1542 nm ), the OH line was not seriously contaminated and still dominant to $$\text {N}_2^+$$ N 2 + emissions. Furthermore, we evaluated $$\text {N}_2^+$$ N 2 + (1,2) band effects on OH rotational temperature estimations quantitatively for the first time. Auroral contaminations from $$\text {N}_2^+$$ N 2 + (1,2) band basically lead negative bias in OH rotational temperature estimated by line-pair-ratio method with $$\text {P}_1(2)$$ P 1 ( 2 ) and $$\text {P}_1(4)$$ P 1 ( 4 ) lines in OH (3,1) band. They possibly cause underestimations of OH rotational temperatures up to 40 K. In addition, $$\text {N}_2^+$$ N 2 + (1,2) band contaminations were temporally limited to a moment around the aurora breakup. This is consistent with proceeding studies reporting that enhancements of ... |
format |
Article in Journal/Newspaper |
author |
Takanori Nishiyama Makoto Taguchi Hidehiko Suzuki Peter Dalin Yasunobu Ogawa Urban Brändström Takeshi Sakanoi |
author_facet |
Takanori Nishiyama Makoto Taguchi Hidehiko Suzuki Peter Dalin Yasunobu Ogawa Urban Brändström Takeshi Sakanoi |
author_sort |
Takanori Nishiyama |
title |
Temporal evolutions of $$\text {N}_2^+$$ N 2 + Meinel (1,2) band near $$1.5.\,\upmu \text {m}$$ 1.5 . μ m associated with aurora breakup and their effects on mesopause temperature estimations from OH Meinel (3,1) band |
title_short |
Temporal evolutions of $$\text {N}_2^+$$ N 2 + Meinel (1,2) band near $$1.5.\,\upmu \text {m}$$ 1.5 . μ m associated with aurora breakup and their effects on mesopause temperature estimations from OH Meinel (3,1) band |
title_full |
Temporal evolutions of $$\text {N}_2^+$$ N 2 + Meinel (1,2) band near $$1.5.\,\upmu \text {m}$$ 1.5 . μ m associated with aurora breakup and their effects on mesopause temperature estimations from OH Meinel (3,1) band |
title_fullStr |
Temporal evolutions of $$\text {N}_2^+$$ N 2 + Meinel (1,2) band near $$1.5.\,\upmu \text {m}$$ 1.5 . μ m associated with aurora breakup and their effects on mesopause temperature estimations from OH Meinel (3,1) band |
title_full_unstemmed |
Temporal evolutions of $$\text {N}_2^+$$ N 2 + Meinel (1,2) band near $$1.5.\,\upmu \text {m}$$ 1.5 . μ m associated with aurora breakup and their effects on mesopause temperature estimations from OH Meinel (3,1) band |
title_sort |
temporal evolutions of $$\text {n}_2^+$$ n 2 + meinel (1,2) band near $$1.5.\,\upmu \text {m}$$ 1.5 . μ m associated with aurora breakup and their effects on mesopause temperature estimations from oh meinel (3,1) band |
publisher |
SpringerOpen |
publishDate |
2021 |
url |
https://doi.org/10.1186/s40623-021-01360-0 https://doaj.org/article/ee2690c688ff4c12a700f033f34c4393 |
geographic |
Antarctic Kiruna Syowa Station |
geographic_facet |
Antarctic Kiruna Syowa Station |
genre |
Antarc* Antarctic Kiruna |
genre_facet |
Antarc* Antarctic Kiruna |
op_source |
Earth, Planets and Space, Vol 73, Iss 1, Pp 1-12 (2021) |
op_relation |
https://doi.org/10.1186/s40623-021-01360-0 https://doaj.org/toc/1880-5981 doi:10.1186/s40623-021-01360-0 1880-5981 https://doaj.org/article/ee2690c688ff4c12a700f033f34c4393 |
op_doi |
https://doi.org/10.1186/s40623-021-01360-0 |
container_title |
Earth, Planets and Space |
container_volume |
73 |
container_issue |
1 |
_version_ |
1766267604019707904 |