...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Statistical properties and geoefficiency of interplanetary coronal mass ejections and their sheaths during intense geomagnetic storms
【24h】

Statistical properties and geoefficiency of interplanetary coronal mass ejections and their sheaths during intense geomagnetic storms

机译：统计特性和geoefficiency星际日冕物质抛射和他们强烈的磁暴期间鞘

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In this paper, we examine and compare the statistical properties of interplanetary coronal mass ejections (ICMEs) and their sheath regions in the near-Earth space, mainly focusing on the distributions of various physical parameters and their geoefficiency. The 53 events studied are a subset of events responsible for intense (Dst ≤ -100 nT) geomagnetic storms during the time period from 1996 to 2005. These events all fall into the single-type category in which each of the geomagnetic storms was caused by a well-isolated single ICME, free of the complexity of the interaction of multiple ICMEs. For both sheaths and ICMEs, we find that the distributions of the magnetic field strength, the solar-wind speed, the density, the proton temperature, the dynamic pressure, the plasma beta, and the Alfven Mach number are approximately lognormal, while those of the Bz component and the Y component of the electric field are approximately Gaussian. On the average, the magnetic field strengths, the Bz components, the speeds, the densities, the proton temperatures, the dynamic pressures, the plasma betas, and the Mach numbers for the sheaths are 15, 80, 4, 60, 70, 62, 67, and 30 higher than the corresponding values for ICMEs, respectively, whereas the Y component of the electric field for the sheaths is almost 1 s of that for ICMEs. The two structures have almost equal energy transfer efficiency and comparable Newell functions, whereas they show statistically meaningful differences in the dayside reconnection rate, according to the Borovsky function.
机译：在本文中,我们检查和比较星际日冕的统计特性质量抛射(icm)和鞘区域在近地空间,主要关注的各种物理参数和分布geoefficiency。负责强烈(Dst≤子集的事件-100元)磁暴期间从1996年到2005年。到每个单一类型的分类地磁风暴引起的well-isolated单一ICME,免费的复杂性多个icm的交互。鞘和icm,我们发现分布磁场强度的太阳风质子速度,密度,温度,动压、血浆β和阿尔芬马赫数是近似对数正态的,而Bz组件和Y分量的电场近似高斯。平均磁场强度,热晕组件、速度、密度、质子温度、动态压力,等离子体贝塔,鞘的马赫数80 4 70, 62, 67,高出30%icm的相应值分别而电场的Y分量鞘几乎是1 s的icm。两种结构几乎相等的能量转移效率和可比Newell功能,而他们表现出统计上有意义差异的光面重联率,根据Borovsky函数。

著录项

相似文献

  • 外文文献
  • 中文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号