A new plasmapause location model based on THEMIS observations  

作　　者：LIU Xu LIU WenLong 

机构地区：[1]Space Science Institute, School of Astronautics, Beihang University [2]State Key Laboratory of Space Weather, Chinese Academy of Sciences

出　　处：《Science China Earth Sciences》2014年第10期2552-2557,共6页中国科学（地球科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.41104109,41274166);the Specialized Research Fund for State Space Weather Key Laboratories(Grant No.201203FSK05)

摘　　要：A new empirical model of plasmapause location as functions of magnetic local time and geomagnetic indices has been developed based on the observations from THEMIS mission. We use the two-year data of electron density inferred from spacecraft potential to identify the plasmapause crossings and create a database of plasmapause locations. The database is further used to build up an empirical model of plasmapause related to magnetic local time based on the equation from O'Brien and Moldwin(2003). The new model is compared with previous plasmapause location models. It is found that our newly developed model is the best in predicting plasmapause locations among the existing models. The models based on Kp and Dst indices are better than the model based on AE index, suggesting that the plasmapause location is controlled by large scale convection of the magnetosphere.A new empirical model of plasmapause location as functions of magnetic local time and geomagnetic indices has been devel- oped based on the observations from THEMIS mission. We use the two-year data of electron density inferred from spacecraft potential to identify the plasmapause crossings and create a database of plasmapause locations. The database is further used to build up an empirical model of plasmapause related to magnetic local time based on the equation from O＇Brien and Moldwin （2003）. The new model is compared with previous plasmapause location models. It is found that our newly developed model is the best in predicting plasmapause locations among the existing models. The models based on Kp and Dst indices are better than the model based on AE index, suggesting that the plasmapause location is controlled by large scale convection of the magnetosphere.

关 键 词：PLASMAPAUSE geomagnetic index magnetic local time 

分 类 号：P352[天文地球—空间物理学]