一种电离层垂直剖面物理模型及其与IRI-90模型的比较

在８０－５００ｋｍ范围内考虑了３种 成份的４种离子，从严格的电子和离子密度连续方程出发，对中性风和效应进行了全面、连续的考虑，由此建立了一种电离层的物理模式；在此模式的基础上针对北京地区分别对太阳活动低年（Ｆ１０．７＝６０）、高年（Ｆ１０．７＝３００）的春（ＤＯＹ＝９０）、夏（ＤＯＹ＝１８０）、秋（ＤＯＹ＝２７０）、冬（ＤＯＹ＝３６５）进行计算，并将所得结果与ＩＲＩ－９０进行了比较。结果表明：Ｅ层

A PHYSICAL MODEL FOR IONOSPHERIC VERTICAL PROFILE AND COMPARISON BETWEENIT AND IRI-90

A physical model for ionospheric vertical profile is established, taking into ac-count four species of ions and electrons in the region of 80-500 km. Neutral windand ions' motion are both involved in the continuity equations for those five species.Ionospheric proflles in different seasons at low and high solar activities are calcu-lated and compared with the results from IRI-90. Results show that E region is atypical Chapman layer and the depth of E-F valley is generally 0.2-0.5 which isdeeper than that given by IRI-90. That the F1 ledge is most obvious in summerat low solar activity is consistent with widely accepted theories, but the F1 ledgeseldom appear in IRI-90. In F2 region, the electron number density at high solaractivity is greater than that at low solar activity, and in winter is greater than thatin summer. rhese all agree with observations rather well.