Ionisation in the Antarctic stratosphere |
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| Institution: | 1. Escola Politécnica, Universidade Federal da Bahia, Salvador, Bahia, 40210-630, Brazil;2. CICECO – Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal;3. Mountain Research Center – CIMO, Polytechnic Institute of Bragança, 5301-855 Bragança, Portugal;1. School of Materials Science and Engineering, Tianjin University, Tianjin, China;2. Charles Institute of Dermatology, School of Medicine and Biomedical Science, University College Dublin, Dublin 4, Ireland;3. Department of Dermatology and Cutaneous Biology, Thomas Jefferson University, Philadelphia, PA 19107, USA;4. The Leibniz Institute of Polymer Research Dresden (IPF), Dresden 01069, Germany;1. Thin Film Nanomaterials Laboratory, Department of Physics, Shivaji University, Kolhapur 416 004, India;2. Radiation and Material Research Laboratory, Department of Physics, Shivaji University, Kolhapur 416 004, India;3. Department of Chemistry, D. Y. Patil Agriculture and Technical University, Talsande 416 112, India;4. Department of Electronics and Physics, G. K. G. College, Kolhapur 416 004, India;5. Optoelectronics Convergence Research Center, Department of Materials Science and Engineering, Chonnam National University, 300, Yongbong-Dong, Buk-Gu, Gwangju 61186, South Korea;6. Department of Material Science and Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Republic of Korea |
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| Abstract: | Results from a partial reflection radar experiment, operated at a frequency of 2.9 MHz at Scott Base, Antarctica, are presented for the time interval from January 1987 to June 1991. It is shown that a layer of ionisation can frequently be identified at scattering heights between 40 and 55 km. Details regarding the maximum density, thickness, and frequency of occurrence of this ionisation layer are presented. From sequential occurrences of the ionisation an approximate life time of 70 min is deduced for the layer. The possibility that the ionisation layer is produced by a flux of relativistic electrons is investigated. |
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