The influence of polar-cap convection on the geoelectric field at Vostok, Antarctica

Atmospheric Global Circuit Variations from Vostok and Concordia Electric Field Measurements

“…It is thus possible to determine how the near-ground-level, vertical electric field responds diurnally and seasonally to solar-wind-imposed, horizontal variations in the local ionospheric potential difference in the polar regions and adjust the measurements to remove the solar wind influence (Corney et al 2003;Burns et al 2012).…”

Antarctic polar plateau vertical electric field variations across heliocentric current sheet crossings

“…A positive association of the cross-polar-cap potential difference above Vostok with solar wind speed and/or magnetic activity would imply that such influences worked generally against the +/À variation and in favour of the À/+ variation, particular immediately following the key date. Corney et al (2003), using a subset of the 1998 Vostok data utilised in this analysis, suggested a greater influence of magnetic activity on the convection above Vostok than was predicted by the Weimer model. Reddell et al (2004) reach a similar conclusion after analysing electric field data collected at South Pole.…”

“…Careful statistical analysis of single-site electric field data has provided experimental proof that the influence of this solar wind generator can be measured at ground level (Tinsley et al, 1998;Frank-Kamenetsky et al, 1999;Burns et al, 2005). The ionospheric potential imposed above Vostok in response to the solar wind contributes on average $10% to the near-ground-level, vertical electric field measurements at this site (Corney et al, 2003). Park (1976a), using measurements of the vertical electric field obtained at Vostok over the $9-month interval between the 12th of March and 6th of November 1974, found an $15% reduction 1-3 days following the passage of HCS crossings [referred to as 'solar magnetic sector boundary crossings' in Park (1976a) and many publications of that era].…”

“…This means that the averaged Vostok diurnal curves are stretched but retain their general shape when the influence of the solar wind-magnetosphere generator is subtracted, as it must be before a valid comparison can be made to the Carnegie curve. An appropriate comparison of the corrected Vostok electric field measurements with the Carnegie curve is made in Corney et al (2003) and Burns et al (2005). Fig.…”

Progress in space weather modeling in an operational environment

“…According to different authors (Makarova et al 1998;Corney et al 2003;Tinsley et al 2007) these superimposed electric fields penetrate as far as down to the Earth's surface and modify the potential gradient.…”