Response of the Upper Atmosphere to Irradiance Increase After the Solar Flare on 6 September 2017
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Author / Producer
Date
2021
Publication Type
Conference Paper
ETH Bibliography
yes
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Abstract
In this study, we analyzed the reaction of the upper atmosphere to an increase in illumination after the solar flare on 6 September 2017. This intense solar-terrestrial disturbance event was caused by the active region of the Sun AR2673, which generated several powerful X-class flares. The strongest X9.3 flare occurred on 6 September 2017 inducing an increase in illumination in the extreme ultraviolet and soft X-ray ranges of the solar spectrum. We used the FISM2 empirical model to derive the flare irradiance data and the HAMMONIA 3D high-top chemistry-climate model to study the related atmospheric effects. We showed that the event has significantly affected the upper atmospheric chemistry and produced up to 300% increase in odd nitrogen around 80 km.
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published
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Book title
27th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics
Journal / series
Volume
11916
Pages / Article No.
1191680
Publisher
SPIE
Event
27th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics
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Date collected
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Subject
Solar flare; solar irradiance; photoionization; mesosphere; chemistry-climate model; hydrogen radicals; nitrogen radicals