磁静日电离层电势分布的形态学研究  

Morphological Study on Magnetically Quiet-day Ionospheric Potential Distribution

作　　者：王瑜晗 任志鹏[1,2,3] 于婷婷 刘耘博 魏勇 WANG Yuhan;REN Zhipeng;YU Tingting;LIU Yunbo;WEI Yong(Key Laboratory of Earth and Planetary Physics,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029;Beijing National Observatory of Space Environment,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029;College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing 100049)

机构地区：[1]中国科学院地质与地球物理研究所地球与行星物理院重点实验室,北京100029 [2]中国科学院地质与地球物理研究所北京空间环境国家野外科学观测研究站,北京100029 [3]中国科学院大学地球与行星学院,北京100049

出　　处：《空间科学学报》2023年第2期251-259,共9页Chinese Journal of Space Science

基　　金：中国科学院战略性先导科技专项(B类)(XDB4100000);中国科学院战略性先导科技专项(A类)(XDA17010201,XDA17010404);中国科学院重点部署项目(ZDRY-KT-2021-3);国家自然科学基金项目(41874179,41674158,41427901);民用航天技术预先研究项目(D020105);重大科研基础设施开放研究项目;中国博士后科学基金会(2021M703192)共同资助。

摘　　要：利用理论模式GCITEM,在国际地磁参考场(IGRF)下,模拟了地磁平静条件下的电离层发电机主导的中低纬电离层电势分布,研究了太阳活动、季节、世界时和低层大气潮汐对电离层电势的调节作用。结果表明,各种条件下中低纬电势全局分布基本一致,都具有两个正电势峰值(源)和一个负电荷峰值(汇);电势分布存在明显的季节和世界时差异;中低纬电离层电势峰值差随着太阳活动的增强明显增加,并在一定太阳活动高值后趋于饱和;周日迁移潮主要影响赤道地区,导致电势峰值差增加,而半周日迁移潮主要影响中纬度地区,导致电势峰值差减小。Under the International Geomagnetic Reference Field(IGRF),Global Coupled Ionosphere-Thermosphere-Electrodynamics Model(GCITEM)simulations are used to investigated magnetically quiet-day ionospheric potential distribution at middle-low latitudes,which is dominated by ionospheric dynamo.We present the dependence of ionospheric potential on solar activity,season,UT,and lower atmospheric tides.The results are as follows:the global distribution of ionospheric potential is similar under different conditions.There are two positive potential peaks(source)and one negative charge peak(sink)in one hemisphere.Potential distributions have obvious seasonal and UT variations.The differences of potential peak between source and sink have an increase with the increase of solar activity,however,the differences tend to saturate after a high solar activity level.The diurnal migration tides mainly affect the ionospheric potential at equatorial regions,resulting in the increase of potential peak differences.In comparison,the semi-diurnal migration tides mainly affect the ionospheric potential at middle latitudes,resulting in the decrease of potential peak differences.

关 键 词：电离层电动力学 电离层电势变化性 数值模拟 电离层发电机 大气潮汐 

分 类 号：P352[天文地球—空间物理学]