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Thermospheric meridional neutral winds associated with equatorial midnight temperature maximum (MTM)

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dc.contributor.author Sastri, J. H
dc.contributor.author Rao, H. N. R
dc.contributor.author Somayajulu, V. V
dc.contributor.author Chandra, H
dc.date.accessioned 2008-08-05T07:55:06Z
dc.date.available 2008-08-05T07:55:06Z
dc.date.issued 1994-05
dc.identifier.citation Geophysical Research Letters, Vol. 21, No. 9, pp. 825 - 828 en
dc.identifier.issn 0094-8276
dc.identifier.uri http://hdl.handle.net/2248/3026
dc.description.abstract Coordinated measurements were made on two nights in December 1992 of thermospheric temperature with a Fabry-Perot Interferometer (FPI) at Kavalur ( dip∼ 9.5° N) and of F-layer height with ionosondes at Trivandrum ( dip∼ 0.6° S), Kodaikanal ( dip 3°N), Sriharikota ( dip∼ 10.5° N) and Ahmedabad (dip 34°N) in India. On both the nights which are geomagnetically quiet (Ap≤9), the FPI measurements revealed a distinct temperature enhancement around midnight over Kavalur. Neutral winds estimated from h'F data of Trivandrum and Sriharikota showed significant poleward winds in association with the temperature increase over Kavalur. At Ahmedabad a clear-cut descent of F-layer followed the temperature enhancement over Kavalur. This pattern is consistently seen on the two nights. The simultaneous thermospheric and ionospheric observations demonstrate for the first time the relationship, in totality, between the equatorial midnight temperature maximum (MTM), poleward reversal of nighttime meridional winds and ‘postmidnight collapse’ of F-layer at low latitudes. en
dc.format.extent 3894 bytes
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher American Geophysical Union en
dc.relation.uri http://www.agu.org/pubs/crossref/1994/93GL03009.shtml en
dc.subject Fabry-Perot Interferometer (FPI) en
dc.subject 2415 Ionosphere; Equatorial Ionosphere 0310 Atmospheric Composition and Structure en
dc.subject Airglow and Aurora 2427 Ionosphere/Atmosphere Interactions (0335) 0355 Thermosphere-Composition and Chemistry en
dc.title Thermospheric meridional neutral winds associated with equatorial midnight temperature maximum (MTM) en
dc.type Article en

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