The geoelectric field at Davis station,Antarctica |
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| Institution: | 1. Australian Antarctic Division, Kingston, Tasmania 7050, Australia;2. Physics Department, La Trobe University, Bundoora, Victoria 3083, Australia;1. Geophysical Institute & Dept. Geosciences, University of Alaska Fairbanks, 2156 Koyukuk Drive, Fairbanks 99775, AK, USA;2. Dept. Earth Environmental Science, New Mexico Institute of Mining & Technology, 801 Leroy Pl., Socorro 87801, NM, USA;3. Department of Geosciences, Warner College of Natural Resources, Colorado State University, 1482 Campus Delivery, Fort Collins 80523-1482, CO, USA;4. School of Earth Sciences, Ohio State University, 125 South Oval Mall, Columbus 43210, OH, USA;5. Dept. of Earth, Environmental and Resource Sciences, University of Texas at El Paso, 500 W University, El Paso 79902, TX, USA;1. British Antarctic Survey, Cambridge, UK;2. University of Texas at Dallas, Richardson, TX, USA;1. Department of Meteorology, University of Reading, Reading, UK;2. Department of Electronic and Electrical Engineering, University of Bath, Bath, UK;3. Research Centre for Astronomy and Earth Sciences, GGI, Hungarian Academy of Sciences, Sopron, Hungary;4. Yerevan Physics Institute, Yerevan, Armenia;5. Institute of Atmospheric Physics CAS, Bocni II/1401, 14131 Prague 4, Czech Republic;6. Department of Environmental Engineering, Democritus University of Thrace, Xanthi, Greece;7. Tripura University, Tripura, India;8. Institute of Geophysics, Polish Academy of Sciences, Warsaw, Poland;9. Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod, 603950, Russia;10. School of Chemistry, University of Bristol, Bristol, UK;11. Center for Radio Astronomy and Astrophysics Mackenzie (CRAAM), Engineering School, Presbyterian Mackenzie University, São Paulo, Brazil;12. School of Biological Sciences, University of Bristol, Bristol, UK;13. Renewable Energies Chair and Institute of Earth Sciences, University of Évora, Portugal;14. School of Sustainability, Interdisciplinary Centre Herzliya, Israel;15. Department of Physics, Ariel University, Ariel, Israel;p. Eastern R&D Center, Ariel, Israel;1. Equatorial Geophysical Research Laboratory, Indian Institute of Geomagnetism, Krishnapuram, Tirunelveli, 627 011, India;2. Indian Institute of Geomagnetism, Navi Mumbai, 410 218, India;3. Magnetic Observatory, Indian Institute of Geomagnetism, Alibag, 402 201, India;4. Magnetic Observatory, Indian Institute of Geomagnetism, Assam University Campus, Silchar, 788 011, India;1. Department of Meteorology, University of Reading, UK;2. Department of Electronic and Electrical Engineering, University of Bath, UK |
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| Abstract: | An electric field mill is used to measure the vertical component of the geoelectric field at Davis station, Antarctica (68.6°S, 78.0°S, geographic coordinates; 74.6°S magnetic latitude). Local influences on the measurements are determined. Approximately a year of data is subjectively examined to determine periods when the ‘fair-weather’ electric field is expected to be dominant. Using a ‘cumulation of consecutive differences’ method, small intervals of data are combined to determine winter, spring and autumn diurnal ‘fair-weather’ electric field curves. A paucity of intervals not locally influenced precludes determination of a summer diurnal curve.The seasonal-diurnal curves each show a peak between 19 UT and 22 UT that is similar in temporal location and relative magnitude to the global, fair-weather, seasonal diurnal curves (see Reiter, 1992, p. 130). A local influence persists between 03 UT and 10 UT and precludes determination of a magnetospheric influence on the geoelectric field for these data. |
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