High power radio waves are capable of exciting a variety of parametric plasma instabilities in the ionosphere. Certain instabilities of this type result in the generation of electrostatic plasma waves and plasma density irregularities. These generation processes are often accompanied by strong anomalous absorption of the high power radio waves and this, in turn, gives rise to the large scale modification of the temperature and density of the ionospheric plasma. Results of some recent ionospheric modification experiments undertaken with the Max-Planck Institut fur Aeronomie (Lindau) high power facility at Tromso, Norway, are reviewed. The interpretation of these results in terms of the nonlinear development and saturation of the plasma instabilities involved is also discussed.
高功率无线电波能够在电离层中激发多种参数等离子体不稳定性。这类不稳定性中的某些类型会导致静电等离子体波和等离子体密度不规则性的产生。这些产生过程通常伴随着高功率无线电波的强异常吸收，而这反过来又会导致电离层等离子体温度和密度的大尺度改性。本文回顾了利用马克斯·普朗克航空研究所（林道）高功率设施在挪威特罗姆瑟进行的一些近期电离层改性实验的结果。此外，还讨论了利用所涉及等离子体不稳定性的非线性发展和饱和对这些结果的解释。