Nighttime proton fluxes at Millstone Hill

Details Nighttime proton fluxes at Millstone Hill Nighttime proton fluxes at Millstone Hill

Aug 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978p%26ss...26..727e&link_type=abstract

Planetary and Space Science, vol. 26, Aug. 1978, p. 727-744.

Physics

7

Earth Magnetosphere, F Region, Midlatitude Atmosphere, Night Sky, Proton Flux Density, Altitude, Annual Variations, Diurnal Variations, Electron Density Profiles, Incoherent Scatter Radar, Ionospheric Ion Density, Oxygen Ions, Solar Activity Effects

Scientific paper

Incoherent scatter estimates of electron content and N(O+)/N(H+) versus altitude gathered over Millstone Hill (42.6 deg N, 71.5 deg W) during 1969, 1972, and 1973 were used to infer behavior of the H+ fluxes coupling the F-region and the protonosphere. It was found that during the daytime, the H+ flux is upwards and close to its limiting value at all times. Near a sunspot maximum the midday escape flux is about 50,000,000 ions per sq cm per sec. At night in summer, the flux remains upward near sunspot maximum and has value close to the limiting flux. At night in winter at sunspot maximum, the flux remains upward after sunset, but usually becomes downward after midnight until sunrise. The duration of the downward period increases with decreasing sunspot number. The decrease in O+ at night near sunspot maximum appears to be more than offset by the decrease in O and increase in H.

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