近期發現在太平洋的中緯電離層及赤道區域具有強烈長持續時間的高能粒子增加現象。我們在之前的 國科會及科技部計畫的研究成果中，提出了正電離層暴發生時的高能粒子增加有顯著的電離效應，認 為這會影響中低緯度的電離層閃爍。但由於缺乏輻射帶理論，至今仍少有關於此類高能粒子增強的研 究，也因此尚未能了解此種增強現象。我們的研究已經發現高能粒子可以由內輻射帶入射進入電離層， 本計畫我們想要探索入射機制，並且將根據兩個太陽週期的統計資料建立一概率模型，藉由分析具決 定性的太陽風及地球磁場參數將有助於瞭解粒子入射機制，而將此模型應用於電離層的研究將有助於 改善低緯電離層擾動（諸如：正電離層暴及電離層閃爍）的模型及預報工作。 ;Recently, we discovered strong long-lasting enhancements of energetic particles in the low-latitude ionosphere over the globe. The previous studies, conducted in the frame of NSC and MOST projects, revealed in the first time a significant ionizing impact of energetic particle enhancements to positive ionospheric storms. An influence of the enhancements to ionospheric scintillations at low and middle latitude was suggested. Being forbidden in the theory of radiation belts, the phenomenon of enhancements is still very poorly investigated and not completely understood. We have found that the energetic particles are injected to the ionosphere from the inner radiation belt. It is proposed to explore the mechanism of particle injection and determine key solar wind and geomagnetic parameters driving the injection. For this purpose we will use statistics of two solar cycles collected from measurements of NOAA/POES satellites as well as new joint Taiwan-Japan ERG mission. We will develop a probabilistic model of forbidden particle enhancements and their ionospheric effects. The model will be an important part in the space weather monitoring and prediction of ionospheric disturbances such as positive storms and ionospheric scintillations at low latitudes.
