Abstract The Lower Thermosphere Coupling Study (LTCS) is a coordinated investigation of the lower thermosphere (80 – 150 km) combining observational (optical and radar) and numerical modelling efforts with the ultimate goal of better understanding the dynamic and electrodynamic processes coupling the mesosphere, lower thermosphere, and upper thermosphere regions. The study, which is being conducted under the auspices of the CEDAR (Coupling, Energetics, and Dynamics of Atmospheric Regions) and WITS (World Ionosphere and Thermosphere Study) Programs, is intended to address such questions as: What is the relative importance of upward propagating tides, planetary waves, and gravity waves, related accelerations of the mean flow, and heating and momentum sources of magnetospheric origin, in determining neutral dynamical fields and ionospheric structures as a function of height between 90 and 150 km? What are the seasonal-latitudinal and diurnal variations in turbulent diffusivities due to gravity wave saturation, and related implications on the vertical transport of O and NO? What are the relative roles of magnetospheric currents, the E-region wind dynamo, and nighttime conductivities in determining ionospheric electric fields? Emphasis of the study will be placed on neutral winds, temperatures, electric fields, and currents during a series of coordinated measurements campaigns each consisting of a 30-day ‘background’ period and a 4–6 day ‘core period’. The first campaign was conducted during 15 September 1987 – 15 October 1987 with a core period during 21 – 25 September 1987. The scientific basis for the LTCS, its organization, and preliminary results from the 1987 campaign are reviewed in this paper.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    The lower thermosphere coupling study of the cedar and wits programs


    Beteiligte:

    Erschienen in:

    Advances in Space Research ; 10 , 6 ; 251-259


    Erscheinungsdatum :

    1989-01-01


    Format / Umfang :

    9 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Air density in the lower thermosphere

    POE, R. / SMALL, H. | AIAA | 1965


    Mesosphere/lower thermosphere prevailing wind model

    Portnyagin, Yu. / Solovjova, T. / Merzlyakov, E. et al. | Elsevier | 2003


    Mesosphere/lower thermosphere prevailing wind model

    Portnyagin, Y. / Solovjova, T. / Merzlyakov, E. et al. | British Library Conference Proceedings | 2004


    On Thermosphere-Mesosphere-Stratosphere Coupling

    Chakrabarty, D. K. / International Council of Scientific Unions | British Library Conference Proceedings | 2003


    On thermosphere-mesosphere-stratosphere coupling

    Chakrabarty, D.K. | Online Contents | 2003