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国家自然科学基金(40474062)

作品数:3 被引量:14H指数:2
相关作者:马玉端刘振兴曹晋滨周国成更多>>
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磁宁静期磁尾爆发性整体流持续时间多点卫星研究被引量:12
2005年
本文利用星簇CLUSTER的三颗卫星数据分析了磁宁静期磁尾爆发性整体流(BBFs,BurstyBulkFlows)的时间尺度,并与单个卫星的结果做了比较.事例研究表明,利用三颗卫星观测数据判断的BBFs的时间尺度比单个卫星的大一倍左右.对于三颗卫星观测到的同一个BBFs ,BBFs在晨昏方向上的摆动决定了CLUSTER的三个卫星观测到BBFs的先后次序.三颗卫星的观测也显示了BBFs的高度局域化特征.磁宁静期磁尾BBFs寿命的增大,使得BBFs携带的质量和能量的地向输运增加.这种地向输运增加的结果是:磁尾储存的能量得到较为平稳的释放,改变了亚暴起始产生的时间,为解决磁层压力平衡矛盾(PBI,PressureBalanceInconsistency)问题提供了新的思路.
马玉端曹晋滨周国成刘振兴H.RemeI.Dandouras
关键词:局域化输运
A Theoretic Interpretation of Movement of the Cusp Equatorward Boundary被引量:2
2005年
A preliminary model is proposed to describe quantitatively the position and movement of cusp equatorward boundary. This integrated model, consisting of an empirical model of the magnetopause and a compressed dipolar model of Open/Closed field line, connects quantitatively the solar wind conditions, subsolar magnetopause and cusp equatorward boundary. It is shown that the increasing solar wind dynamic pressure and the increasing southward Interplanetary Magnetic Field (IMF) component drive the magnetopause to move inward and the cusp equatorward. This model is adopted to interpret quantitatively the cusp movement of August 14, 2001 observed by Cluster. The results show that the subsolar magnetopause moved earthward from 10.7 Re to 9.0Re during the period of 002300-002800 UT, and correspondingly the cusp equatorward boundary shifted equatorward. The observations of Cluster C1 and C4 show the cusp equatorward boundary that Cluster C1 and C4 were crossing during same interval moved equatorward by 4.6°. The cusp equatorward boundary velocity computed in the theoretical model (10.7 km/s) is in good agreement with the observed value(9.4km/s) calculated from the data of CIS of Cluster C4 and C1.
J. B. CaoA. LeonovichG. C. ZhouZ. X. LiuH. RemeI. Dandouras
关键词:太阳风赤道
地磁活动时期磁尾爆发性整体流的多点卫星研究
<正> 磁尾爆发性整体流(BBF,Bursty Bulk Flow)事件和亚暴的对应关系,以及BBF事件在亚暴爆发期间和磁层平静时期对磁层能量、质量和磁通量地向输运的重要性一直是有争议的问题,不同的卫星得出的结论差别很大...
马玉端曹晋滨周国成刘振兴H.RemeI.Dandouras
文献传递
Magnetospheric Physics in China During the Period of 2004 - 2006被引量:1
2006年
Their brief report presents the advances of the magnetospheric physics researches in China during the period of 2004-2006. During the past two years, China-ESA cooperation DSP (Double Star Program) satellites were successively launched. In addition, China also participated in the scientific research of ESA's Cluster mission. The DSP and Cluster missions provide Chinese space physicists high quality data to study multiscale physical process in the magnetosphere. The work made based on the data of DSP is presented in the paper of "Progress of Double Star Program" of this issue.
CAO Jinbin LIU Zhenxing
关键词:MAGNETOSPHEREPHYSICS
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