The twilight d-region and metallic ionization

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dc.contributor.authorGough M.P.
dc.date.accessioned2024-03-13T01:48:00Z
dc.date.available2024-03-13T01:48:00Z
dc.date.issued1975
dc.description.abstractMetallic ions exist in a narrow belt in the Earth's atmosphere in the altitude range 80-110 km. The photo-ionization of Sodium atoms can be an important source of ionization in the upper D-region during twilight. Sodium photo-ionization accounts for, on the average, between 18 and 64 per cent of the total twilight ionization at 90 km depending on the season. Maximum sodium ionization occurs around the month of January in the northern hemisphere. As the upper atmosphere sodium atoms are thought to sublime from extra-terrestrial dust, the twilight D-region should be very sensitive to extra-terrestrial dust influxes and periods of elevated atmospheric temperatures. None of the other metallic ions are likely to have any significant effect on the twilight D-region ionization. © 1975.
dc.description.firstpage565
dc.description.issuenumber3
dc.description.lastpage568
dc.description.volume37
dc.identifier.doi10.1016/0021-9169(75)90183-X
dc.identifier.issn0021-9169
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/38093
dc.relation.ispartofJournal of Atmospheric and Terrestrial Physics
dc.rightsAcesso Restrito
dc.titleThe twilight d-region and metallic ionization
dc.typeArtigo
local.scopus.citations1
local.scopus.eid2-s2.0-49649141560
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=49649141560&origin=inward
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