EISCAT observations of main ionization troughs in the high-latitude ionosphere |
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Authors: | Liu Peng Ma Shu-ying K. Schlegel |
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Affiliation: | (1) College of Electronic Information, Wuhan University, 430072 Wuhan, China;(2) Ionospheric Observatory, Wuhan Institute of Physics, the Chinese Academy of Sciences, 430071 Wuhan, China;(3) Max-Planck Institut fuer Aeronomie, D-37189 Katlenburg-Lindau, Germany |
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Abstract: | F-region electron density depletions associated with main ionization troughs in the high-latitude ionosphere are studied using EISCAT CP3 data of meridian scanning experiments. The troughs in our observations are found to appear mainly in dusk sector, extending from late afternoon to pre-midnight, with higher occurrence rate during equinox and winter. Simultaneous ion drift velocity inF-region shows that the main trough minimum is mostly located at the equator ward edge of the plasma convection flow, rather than in the region where the largest ion flow are observed. Foundation item: Supported by the National Natural Science Foundation of China (49674241) and the Research Fund for the Doctoral Program of Higher Education Biography: LIU Peng (1978-), male, Master candidate. Research direction: studying high-latitude ionosphere using EISCAT radar. |
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Keywords: | high-latitude ionosphere main ionization trough plasma convection flow incoherent scatter radar observation |
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