Sodium dayglow: Observation and interpretation of a large diurnal variation
International audience Analysis of the dayglow of the sodium D lines since September 1960 and the twilight glow since 1954 at Haute Provence Observatory shows a large seasonal maximum of 30 kR for the dayglow in June. The ratio of daytime to twilight abundance then is about 7 to 1. The ratio becomes...
Published in: | Journal of Geophysical Research |
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ftuniversailles:oai:HAL:insu-03636083v1 2023-07-30T04:07:18+02:00 Sodium dayglow: Observation and interpretation of a large diurnal variation Blamont, Jacques Emile Donahue, T. Service d'aéronomie (SA) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) 1964-10-01 https://insu.hal.science/insu-03636083 https://insu.hal.science/insu-03636083/document https://insu.hal.science/insu-03636083/file/ark%20_67375_WNG-ZPPD1V8Q-1.pdf https://doi.org/10.1029/JZ069i019p04093 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/JZ069i019p04093 insu-03636083 https://insu.hal.science/insu-03636083 https://insu.hal.science/insu-03636083/document https://insu.hal.science/insu-03636083/file/ark%20_67375_WNG-ZPPD1V8Q-1.pdf doi:10.1029/JZ069i019p04093 http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess ISSN: 0148-0227 EISSN: 2156-2202 Journal of Geophysical Research https://insu.hal.science/insu-03636083 Journal of Geophysical Research, 1964, 69 (19), pp.4093-4127. ⟨10.1029/JZ069i019p04093⟩ Sodium D Lines Dayglow Twilight Glow Diurnal Variation Atmospheric Ozone [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] info:eu-repo/semantics/article Journal articles 1964 ftuniversailles https://doi.org/10.1029/JZ069i019p04093 2023-07-16T20:31:52Z International audience Analysis of the dayglow of the sodium D lines since September 1960 and the twilight glow since 1954 at Haute Provence Observatory shows a large seasonal maximum of 30 kR for the dayglow in June. The ratio of daytime to twilight abundance then is about 7 to 1. The ratio becomes 2 to 1 in December. Evidence presented for the reality of this effect includes actual line profiles showing an emission peak above Rayleigh-scattered background, observation of the dayglow from a high-altitude airplane, and observation of the dayglow with a rocket-borne photometer. The seasonal maximum is accompanied by a seasonal decrease of 5 km in twilight layer altitude in midsummer. The effect is interpreted as being caused by a diurnal variation in atomic oxygen and ozone enhanced by turbulent diffusion of the sodium and its compounds. Other possible interpretations such as photochemical excitation are rejected. A seasonal variation is also found in the ratio of morning to evening sodium abundance in twilight. The maximum ratio is 1.4 at the equinoxes. At Tromsø, Norway, the dayglow intensity is about 15 kR and shows no seasonal variation. Article in Journal/Newspaper Tromsø Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ Norway Tromsø Journal of Geophysical Research 69 19 4093 4127 |
institution |
Open Polar |
collection |
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
op_collection_id |
ftuniversailles |
language |
English |
topic |
Sodium D Lines Dayglow Twilight Glow Diurnal Variation Atmospheric Ozone [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
spellingShingle |
Sodium D Lines Dayglow Twilight Glow Diurnal Variation Atmospheric Ozone [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] Blamont, Jacques Emile Donahue, T. Sodium dayglow: Observation and interpretation of a large diurnal variation |
topic_facet |
Sodium D Lines Dayglow Twilight Glow Diurnal Variation Atmospheric Ozone [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
description |
International audience Analysis of the dayglow of the sodium D lines since September 1960 and the twilight glow since 1954 at Haute Provence Observatory shows a large seasonal maximum of 30 kR for the dayglow in June. The ratio of daytime to twilight abundance then is about 7 to 1. The ratio becomes 2 to 1 in December. Evidence presented for the reality of this effect includes actual line profiles showing an emission peak above Rayleigh-scattered background, observation of the dayglow from a high-altitude airplane, and observation of the dayglow with a rocket-borne photometer. The seasonal maximum is accompanied by a seasonal decrease of 5 km in twilight layer altitude in midsummer. The effect is interpreted as being caused by a diurnal variation in atomic oxygen and ozone enhanced by turbulent diffusion of the sodium and its compounds. Other possible interpretations such as photochemical excitation are rejected. A seasonal variation is also found in the ratio of morning to evening sodium abundance in twilight. The maximum ratio is 1.4 at the equinoxes. At Tromsø, Norway, the dayglow intensity is about 15 kR and shows no seasonal variation. |
author2 |
Service d'aéronomie (SA) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Blamont, Jacques Emile Donahue, T. |
author_facet |
Blamont, Jacques Emile Donahue, T. |
author_sort |
Blamont, Jacques Emile |
title |
Sodium dayglow: Observation and interpretation of a large diurnal variation |
title_short |
Sodium dayglow: Observation and interpretation of a large diurnal variation |
title_full |
Sodium dayglow: Observation and interpretation of a large diurnal variation |
title_fullStr |
Sodium dayglow: Observation and interpretation of a large diurnal variation |
title_full_unstemmed |
Sodium dayglow: Observation and interpretation of a large diurnal variation |
title_sort |
sodium dayglow: observation and interpretation of a large diurnal variation |
publisher |
HAL CCSD |
publishDate |
1964 |
url |
https://insu.hal.science/insu-03636083 https://insu.hal.science/insu-03636083/document https://insu.hal.science/insu-03636083/file/ark%20_67375_WNG-ZPPD1V8Q-1.pdf https://doi.org/10.1029/JZ069i019p04093 |
geographic |
Norway Tromsø |
geographic_facet |
Norway Tromsø |
genre |
Tromsø |
genre_facet |
Tromsø |
op_source |
ISSN: 0148-0227 EISSN: 2156-2202 Journal of Geophysical Research https://insu.hal.science/insu-03636083 Journal of Geophysical Research, 1964, 69 (19), pp.4093-4127. ⟨10.1029/JZ069i019p04093⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/JZ069i019p04093 insu-03636083 https://insu.hal.science/insu-03636083 https://insu.hal.science/insu-03636083/document https://insu.hal.science/insu-03636083/file/ark%20_67375_WNG-ZPPD1V8Q-1.pdf doi:10.1029/JZ069i019p04093 |
op_rights |
http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/JZ069i019p04093 |
container_title |
Journal of Geophysical Research |
container_volume |
69 |
container_issue |
19 |
container_start_page |
4093 |
op_container_end_page |
4127 |
_version_ |
1772820547697115136 |