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Titolo:
Solar wind influence on the oxygen content of ion outflow in the high-altitude polar cap during solar minimum conditions
Autore:
Elliott, HA; Comfort, RH; Craven, PD; Chandler, MO; Moore, TE;
Indirizzi:
Univ Alabama, CSPAR, Huntsville, AL 35899 USA Univ Alabama Huntsville AL USA 35899 ama, CSPAR, Huntsville, AL 35899 USA NASA, George C Marshall Space Flight Ctr, Space Sci Directorate, Huntsville, AL 35812 USA NASA Huntsville AL USA 35812 ce Sci Directorate, Huntsville, AL 35812 USA NASA, Goddard Space Flight Ctr, Interplanetary Phys Branch, Extraterr PhysLab, Greenbelt, MD 20771 USA NASA Greenbelt MD USA 20771 h, Extraterr PhysLab, Greenbelt, MD 20771 USA
Titolo Testata:
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
fascicolo: A4, volume: 106, anno: 2001,
pagine: 6067 - 6084
SICI:
0148-0227(20010401)106:A4<6067:SWIOTO>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
INTERPLANETARY MAGNETIC-FIELD; PLASMA SOURCE INSTRUMENT; LATITUDE ELECTRIC POTENTIALS; DAYSIDE MAGNETOSPHERE; DYNAMICS EXPERIMENT; BIRKELAND CURRENTS; O+ IONS; SHEET; CONVECTION; IMF;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
55
Recensione:
Indirizzi per estratti:
Indirizzo: Elliott, HA Univ Alabama, CSPAR, Huntsville, AL 35899 USA Univ Alabama Huntsville AL USA 35899 Huntsville, AL 35899 USA
Citazione:
H.A. Elliott et al., "Solar wind influence on the oxygen content of ion outflow in the high-altitude polar cap during solar minimum conditions", J GEO R-S P, 106(A4), 2001, pp. 6067-6084

Abstract

We correlate solar wind and interplanetary magnetic field (IMF) propertieswith the properties of O+ and H+ during early 1996 (solar minimum) at altitudes between 5.5 and 8.9 RE geocentric using the Thermal Ion Dynamics Experiment (TIDE) on the Polar satellite. Throughout the high-altitude polar cap we observe H+ to be more abundant than O+. O+ is found to be more abundant at lower latitudes when the solar wind speed is low (and Kp is low), while at higher solar wind speeds (and high Kp), O+ is observed across most of the polar cap. The O+ density and parallel flux are well organized by solarwind dynamic pressure, both increasing with solar wind dynamic pressure. Both the O+ density and parallel flux have positive correlations with both VswBIMF and E-sw. No correlation is found between O+ density and IMF Bz, although a nonlinear relationship with IMF By is observed, possibly due to a strong linear correlation with the dynamic pressure. H+ is not as highly correlated with solar wind and IMF parameters, although H+ density and parallel flux are negatively correlated with IMF By and positively correlated withboth VswBIMF and E-sw In this solar minimum data set, H+ is dominant, so that contributions of this plasma to the plasma sheet would have very low Oto H+ ratios.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/04/20 alle ore 10:42:06