• 作者： 林崇安
• 作者服務機構： 國立中央大學大氣物理研究所
• 中文摘要： 本文研究地磁特低緯度電離層電漿之力線共振理論。此中考慮了電離層中離子與中性粒子間之碰撞。研究中得知，阿爾文波之週期和由磁層頂表面波激發之部份脈動主軸之偏角與地面觀測一致。依據Kelvin-Helmholtz產生之表面波，主軸之偏角決定於電離層電漿密度之梯度。文中並討論由磁層項傳入之壓縮磁聲波對主軸偏角之變化。最後之結論為地磁特低緯度日間力線共振係由磁層項表面波與傳入之壓縮磁聲波所激發，二者顯示不同之波特性。
• 英文摘要： The purpose of this paper is to study the field line resonant theory in very-low-latitude ionosphericplasma. The collisions of ion and neutral particles in the ionosphere are considered. It is found that theperiod of the Alfven wave and part of the orientation of the pulsation major axis excited by the magneto-ause surface waves are consistent with ground observations. Based on the Kelvin-Helmholtz generatedsurface wave, the angles of the major axis depend strongly on the ionospheric plasma density gradient.Based on the transmitted compressional magnetosonic waves, the angles of the major axis are also discussed.It is concluded that daytime local field lines in geomagnetic very low latitudes can be excited by bothmagnetopause surface waves and transmitted compressional magnetosonic waves and exhibit different wavecharacteristics.
• 中文關鍵字： NHD waves; field line resonant theory
• 英文關鍵字： --