Solar variability and minor constituents in the lower thermosphere and in the mesosphere

dc.contributor.author	Brasseur, G.
dc.contributor.author	De Baets, P.
dc.contributor.author	De Rudder, A.
dc.date	1983
dc.date.accessioned	2017-06-28T12:59:33Z
dc.date.available	2017-06-28T12:59:33Z
dc.identifier.uri	https://orfeo.belnet.be/handle/internal/5915
dc.description	The variation in the solar irradiance related for example to the 11-year cycle leads to changes in the photodissociation and photo-ionization of the upper and middle atmosphere. The strength of the particle precipitation is also modified. These phenomena are responsible for cyclic variations in the concentration of neutral constituents such as water vapor, nitric oxide, atomic oxygen and ozone, and of ionic compounds in the E- and D-region. Such effects have been simulated by means of a zonally-averaged two-dimensional model taking into account the latitudinal and seasonal dependences. As an example, the increase of thermospheric nitric oxide with solar activity, the corresponding enhancement of the downward flux of NO reaching the stratosphere during the winter and the impact of this effect on the photoionization will be considered.
dc.language	eng
dc.title	Solar variability and minor constituents in the lower thermosphere and in the mesosphere
dc.type	Article
dc.subject.frascati	Physical sciences
dc.audience	Scientific
dc.source.title	Space Science Reviews
dc.source.volume	34
dc.source.issue	4
dc.source.page	377-385
Orfeo.peerreviewed	Yes
dc.identifier.doi	10.1007/BF00168829
dc.identifier.scopus	2-s2.0-14444275329