The correlations of ions density with geomagnetic activity and solar dynamic pressure in cusp region  

作　　者：GUO JianGuang SHI JianKui ZHANG TieLong LIU ZhenXing A. FAZAKERLEY H. REME I. DANDOURAS E. LUOEK 

机构地区：[1]State Key Laboratory of Space Weather, CSSAR, Chinese Academy of Sciences, Beijing 100080, China [2]Graduate University of the Chinese Academy of Sciences, Beijing 100049, China [3]Space Research Institute, Austrian Academy of Sciences, Graz, A-8010, Austria [4]MSSL, University College London, Holmbury St. Mary, Dorking, RH5 6NT, UK [5]CESR, Toulouse, 31028, France [6]Imperial College, London, SW7 2BZ, UK

出　　处：《Chinese Science Bulletin》2007年第7期967-971,共5页

基　　金：Supported by the National Natural Science Foundation of China (Grant Nos. 40621003, 40674091 and 40523006);the International Collaboration Research Team Program of the Chinese Academy of Sciences

摘　　要：A statistical study of the properties of ions (O+, He+ and H+) measured by the Cluster-II in cusp region as a function of the solar wind dynamic pressure and geomagnetic index Kp respectively was made dur-ing the summer and fall of 2001-2003. The main results are that: (1) O+ ion density responds in a sig-nificant way to geomagnetic index Kp, and He+ ion density is not correlated with geomagnetic index Kp, both of them have a significant positive correlation with solar wind dynamic pressure; (2) H+ ion density is also observed to increase with solar wind dynamic pressure, and not correlated with geomagnetic index Kp.A statistical study of the properties of ions （O^＋, He^＋ and H^＋） measured by the Cluster-Ⅱ in cusp reglon as a function of the solar wind dynamic pressure and geomagnetic index Kp respectively was made during the summer and fall of 2001 -2003. The main results are that： （1） O^＋ Ion denslty responds in a significant way to geomagnetic Index Kp, and He^＋ ion density is not correlated with geomagnetic index Kp, both of them have a significant positive correlation with solar wind dynamic pressure; （2） H^＋ ion density is also observed to Increase with solar wind dynamic pressure, and not correlated with geomagnetic index Kp.

关 键 词：极隙区 地磁活动 离子密度 太阳风动压 相关性 

分 类 号：P353.7[天文地球—空间物理学]