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Titolo:
An investigation into the influence of tidal forcing on F region equatorial vertical ion drift using a global ionosphere-thermosphere model with coupled electrodynamics
Autore:
Millward, GH; Muller-Wodarg, ICF; Aylward, AD; Fuller-Rowell, TJ; Richmond, AD; Moffett, RJ;
Indirizzi:
Univ Coll London, Dept Phys & Astron, Atmospher Phys Lab, London W1P 7PP, England Univ Coll London London England W1P 7PP hys Lab, London W1P 7PP, England Univ Colorado, NOAA, CIRES, Space Environm Ctr, Boulder, CO 80303 USA UnivColorado Boulder CO USA 80303 ce Environm Ctr, Boulder, CO 80303 USA Univ Sheffield, Dept Appl Math, Upper Atmosphere Modelling Grp, Sheffield S3 7RH, S Yorkshire, England Univ Sheffield Sheffield S Yorkshire England S3 7RH S Yorkshire, England Natl Ctr Atmospher Res, High Altitude Observ, Boulder, CO 80307 USA Natl Ctr Atmospher Res Boulder CO USA 80307 Observ, Boulder, CO 80307 USA
Titolo Testata:
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
fascicolo: A11, volume: 106, anno: 2001,
pagine: 24733 - 24744
SICI:
0148-0227(20011101)106:A11<24733:AIITIO>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
GENERAL-CIRCULATION MODEL; MIGRATING SOLAR TIDES; ELECTRIC-FIELDS; SEMIDIURNAL TIDE; DYNAMO; WINDS; SIMULATION; ENHANCEMENT; SATELLITE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
45
Recensione:
Indirizzi per estratti:
Indirizzo: Millward, GH Univ Coll London, Dept Phys & Astron, Atmospher Phys Lab, 67-73 Riding House St, London W1P 7PP, England Univ Coll London 67-73 Riding House St London England W1P 7PP
Citazione:
G.H. Millward et al., "An investigation into the influence of tidal forcing on F region equatorial vertical ion drift using a global ionosphere-thermosphere model with coupled electrodynamics", J GEO R-S P, 106(A11), 2001, pp. 24733-24744

Abstract

A recent development of the coupled thermosphere-ionosphere-plasmasphere model (CTIP) has been the inclusion of the electrodynamic coupling between the equatorial ionosphere and thermosphere. The vertical ion drifts which result are shown to be largely in agreement with empirical data, on the basisof measurements made at the Jicamarca radar and other equatorial sites [Scherliess and Fejer, 1999]. Of particular importance, the CTIP model clearlyreproduces the "prereversal enhancement" in vertical ion drift, a key feature of the observational data. Inacurracies in the modeled daytime upward ion motion have been investigated with regard to changing the magnitude and phase of components of the lower thermospheric tidal forcing. The results show that daytime vertical ion motion is highly dependent upon both the magnitude and phase of the semidiurnal tidal component. In addition, the CTIP model shows the prereversal enhancement. to be unaffected by changes in tidal forcing, but only for conditions of high solar activity. During periods of low solar activity the form of the prereversal enhancement is clearly dependant upon the magnitude and phase of the semidiurnal tide.

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Documento generato il 06/04/20 alle ore 07:43:35