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Titolo:
Dynamical effects of geomagnetic storms and substorms in the middle-latitude ionosphere: An observational campaign
Autore:
Pi, XQ; Mendillo, M; Hughes, WJ; Buonsanto, MJ; Sipler, DP; Kelly, J; Zhou, QH; Lu, G; Hughes, TJ;
Indirizzi:
Boston Univ, Ctr Space Phys, Boston, MA 02215 USA Boston Univ Boston MA USA 02215 niv, Ctr Space Phys, Boston, MA 02215 USA MIT, Haystack Observ, Atmospher Sci Grp, Westford, MA 01886 USA MIT Westford MA USA 01886 serv, Atmospher Sci Grp, Westford, MA 01886 USA Natl Res Council Canada, Herzberg Inst Astrophys, Ottawa, ON K1A 0R6, Canada Natl Res Council Canada Ottawa ON Canada K1A 0R6 tawa, ON K1A 0R6, Canada SRI Int, Menlo Park, CA 94025 USA SRI Int Menlo Park CA USA 94025SRI Int, Menlo Park, CA 94025 USA Natl Ctr Atmospher Res, High Altitude Observ, Boulder, CO 80307 USA Natl Ctr Atmospher Res Boulder CO USA 80307 Observ, Boulder, CO 80307 USA Natl Astron & Ionosphere Ctr, Arecibo Observ, Arecibo, PR 00613 USA Natl Astron & Ionosphere Ctr Arecibo PR USA 00613 , Arecibo, PR 00613 USA
Titolo Testata:
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
fascicolo: A4, volume: 105, anno: 2000,
pagine: 7403 - 7417
SICI:
0148-0227(20000401)105:A4<7403:DEOGSA>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
F-REGION ELECTRODYNAMICS; AURORAL RED ARCS; ELECTRIC-FIELDS; INCOHERENT-SCATTER; MILLSTONE-HILL; NEUTRAL WINDS; SOLAR-CYCLE; DISTURBANCE DYNAMO; MAGNETIC STORM; MU RADAR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
53
Recensione:
Indirizzi per estratti:
Indirizzo: Pi, XQ CALTECH, Jet Prop Lab, MS 138-308,4800 Oak Grove Dr, Pasadena, CA 91109 USA CALTECH MS 138-308,4800 Oak Grove Dr Pasadena CA USA 91109 1109 USA
Citazione:
X.Q. Pi et al., "Dynamical effects of geomagnetic storms and substorms in the middle-latitude ionosphere: An observational campaign", J GEO R-S P, 105(A4), 2000, pp. 7403-7417

Abstract

An observational campaign was conducted in October 1992 for similar to 36 hours, at three high- to low-latitude sites near 75 degrees W longitude (Sondre Stromfjord, Millstone Hill, and Arecibo). Vector plasma drift velocities are obtained using the incoherent scatter radar technique at each site, Neutral winds were measured using a Fabry-Perot interferometer, and 6300 Angstrom airglow structures were imaged at the midlatitude site. Electric fields and meridional winds for the period were;perturbed when magnetic stormsand substorms occurred on the day and night of the campaign. The penetration of magnetospheric electric field and the following interplays between ionospheric electrodynamics and thermospheric wind perturbations in the midlatitude ionosphere are assessed using the multidiagnostic measurements. Evidence for traveling atmospheric disturbances (TADs) and large-scale gravity waves induced by auroral heating effects upon the thermosphere is identified. Diffuse aurora and a stable aurora red (SAR) are were observed from Millstone Hill during the night of the campaign. The SAR are moved southward when there were westward electric field perturbations, indicating plasmasphere compression in the postmidnight sector under substorm conditions. The SARare location was used to infer the motion of the magnetospheric shielding layer past the Millstone Hill site. Ionospheric F region disturbances in h(m)F(2), NmF2, and total electron content were driven by the observed dynamics, exhibiting a complex mix of wind and electric field perturbations. While standard model episodes of penetration and shielding/overshielding occurred during the daytime event, such unambiguous clarifications were far less obvious during the nighttime event. This is perhaps due to the prolonged period of moderate geomagnetic activity that served as the background conditions for the substorms that occurred during the campaign.

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Documento generato il 13/07/20 alle ore 06:58:53