极区电离层等离子体块的形成机制和演化特征研究

项目名称： 极区电离层等离子体块的形成机制和演化特征研究

项目编号： No.41274149

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 天文学、地球科学

项目作者： 张清和

作者单位： 山东大学

项目金额： 80万元

中文摘要： 太阳风-磁层-电离层相互作用引起的各类动力学过程可直接映射到极区电离层，在极区电离层产生众多不均匀体结构。这些不均匀体结构所引起的极端空间天气环境将对人类的生产生活、通讯和导航等产生直接或间接影响，其中极区电离层等离子体块最为常见，影响最为广泛。因此，研究极区电离层等离子体块的形成机制和演化特征，将有助于深入理解太阳风-磁层-电离层耦合过程，能为极区电离层建模进一步提供物理依据。本项目拟基于我国南极中山站和北极黄河站白天处在极隙区并形成地磁共轭的优越地理条件，利用站上已有的先进光学、无线电等方面设备的观测数据，结合EISCAT/SuperDARN雷达和GPS 地面接收站的协同共轭观测及THEMIS/Cluster/我国双星等十余颗卫星的协同观测，以及相关极区电离层理论和数值模型，深入研究极区电离层等离子体块的形成机制和演化特征，并探讨和分析等离子块和舌状电离区及高纬等离子体槽之间相互关系。

中文关键词： 极区电离层；等离子体云块；形成机制和演化特征；氧离子上行；电离层闪烁

英文摘要： The various dynamic processes, produced by the solar wind-magnetosphere-ionosphere coupling, can directly project into polar ionsphere along the magnetic field lines and generate various irregularities in the polar ionosphere. The extreme environment of space weather, caused by these irregularities, will directly and/or indirectly effect the human live, communication and navigation. The polar ionospheric plasma patch is the most common irregularity and shows a more wider effection to us. Therefore, it is very helpful to study the formation mechanism and evolution feature of the polar ionsopheric plasma patches for understanding the solar wind-magnetosphere-ionosphere coupling process, and can provide further physical basis for the modeling of polar ionosphere. Based on the good geographic locations of magnetic conjugate between Chinese Zhongshan Station in Antarctic and Yellow River Station in Arctic,this project is planning to study the formation mechanism and evolution feature of the polar ionsopheric plasma patches, and to analyse the relationship between the polar cap patches, tongue of ionization and high latitude plasma trough, by using the measurements from the space science observation systems at Zhongshan and Yellow River Station, coordinated the observations from EISCAT/SuperDARN, GPS receivers and THE

英文关键词： Polar ionosphere；plasma patches；formation and evolution；oxygen upflow；ionospheric scintillation