Characteristics of Mesosphere Echoes over Antarctica Obtained Using PANSY and MF Radars

DOI Web Site 被引用文献3件 参考文献28件
  • Tsutsumi Masaki
    National Institute of Polar Research Department of Polar Science, SOKENDAI (Graduate University for Advanced Studies)
  • Sato Kaoru
    Department of Earth and Planetary Science, The University of Tokyo
  • Sato Toru
    Department of Communications and Computer Engineering, Kyoto University
  • Kohma Masashi
    Department of Earth and Planetary Science, The University of Tokyo
  • Nakamura Takuji
    National Institute of Polar Research Department of Polar Science, SOKENDAI (Graduate University for Advanced Studies)
  • Nishimura Koji
    National Institute of Polar Research Department of Polar Science, SOKENDAI (Graduate University for Advanced Studies)
  • Tomikawa Yoshihiro
    National Institute of Polar Research Department of Polar Science, SOKENDAI (Graduate University for Advanced Studies)

書誌事項

公開日
2017
資源種別
journal article
DOI
  • 10.2151/sola.13a-004
公開者
公益社団法人 日本気象学会

説明

<p>We investigated characteristics of mesosphere echoes over Syowa Station (69S) in the Antarctic, which were detected by the Program of the Antarctic Syowa Mesosphere, Stratosphere and Troposphere/Incoherent Scatter (PANSY) radar (47 MHz) and Medium Frequency (MF) radar (2.4 MHz). Winter echoes from the PANSY radar and low altitude MF echoes below approximately 70-75 km mostly coexisted, appearing during the daytime as well as for a few hours post sunset. Summer echoes in the lower height region were absent in both radar observations, suggesting a close relationship in the generation mechanisms of these two radar echoes. High correlation between local K-index and the occurrence of winter echoes suggested that electron density enhancement due to ionized particle precipitation was one of the triggers of echo generation. Angles of arrival of the MF echoes were more isotropic in winter. Because gravity wave activity is much higher in winter over Syowa, higher turbulence energy caused by gravity wave breaking may also be responsible for the generation of the winter echoes and their isotropic behavior. The horizontal wind velocities of the two systems were further compared and agreed well throughout the height region of 60-90 km.</p>

収録刊行物

  • SOLA

    SOLA 13A (Special_Edition), 19-23, 2017

    公益社団法人 日本気象学会

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