,Field-Aligned Currents at the PSBL on 17 August 2001 Storm:Relationships with solar Wind Conditions

• 作 者: CHENG Zheng-Wei SHI Jian-Kui ZHANG Tie-Long WANG Sheng-Guo LIU Zhen-Xing
• 机 构: State Key Laboratory of Space Weather,CSSAR/CAS,Beijing 100190“,”Space Research Institute,Austrian A
• 出 处: 中国物理快报（英文版）
• 发表日期: 2011年9期

Using magnetic field and plasma data acquired with Cluster spacecrafts,we investigate the relationship between the field-aligned currents(FACs)at the plasma sheet boundary layer(PSBL)and solar wind dynamic pressure,as well as the interplanetary magnetic field(IMF)By on 17 August 2001 storm.Our studies reveal that FAC density at the PSBL in the magnetotail in the storm time is controlled mainly by the solar wind dynamic pressure rather than IMF By.The FACs at the PSBL are associated with the low-altitude region-1 current and have the same polarity as region-1 current in the dawn sector.In the polar region,the footprints of the FACs at the appeared in this storm time when a substorm just occurred.