| 场向电流随亚暴位相的变化 |
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| 引用本文： | 焦维新. 场向电流随亚暴位相的变化[J]. 空间科学学报, 1996, 16(2): 140-144. doi: 10.11728/cjss1996.02.140 |
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| 作者姓名： | 焦维新 |
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| 作者单位： | 北京大学地球物理系, 北京 100871 |
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| 摘 要： | 利用ISEE1和2卫星测量的磁场数据,计算了电离层中的场向电流。依据每个场向电流事件所伴随的亚暴位相,分别计算了一区和二区场向电流强度、密度及电流片厚度在亚暴成长相、膨胀相和恢复相的平均值及中间值。其结果,从成长相到膨胀相,一区和二区场向电流的强度和密度增加,从膨胀相到恢复相,其值减小。平均说来,一区的电流强度约是二区的1.4倍。电流片厚度的变化在上述期间内与电流强度及密度的变化趋势相反。
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| 关 键 词： | 场向电流 亚暴位相 亚暴电流楔 |
| 收稿时间： | 1994-12-31 |
| 修稿时间： | 1900-01-01 |
THE RELATIONSHIP BETWEEN FIELD-ALIGNED CURRENT AND SUBSTORM PHASE |
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| Jiao Wei-xin.. THE RELATIONSHIP BETWEEN FIELD-ALIGNED CURRENT AND SUBSTORM PHASE[J]. Chinese Journal of Space Science, 1996, 16(2): 140-144. doi: 10.11728/cjss1996.02.140 |
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| Authors: | Jiao Wei-xin. |
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| Affiliation: | Department of Geophysics, Peking University, Beijing 100871 |
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| Abstract: | ISEE 1 and 2 measurements of magnetic changes across nightside fieldaligned currents (FACs) in the inner magnetosphere are examined to determine the average ionospheric extrapolated characteristics and properties of regin 1 and 2 currents as a function of substorm phase. The properties of these currents studied include current intensity, density and layer width. It is found that there is a close relation between FACs and substorm phase. Both region 1 and region 2 currents intensity reach their peak during the expansion phase. The average value of intensity in region 1 is about 1.4 times greater in region 2. The current densities in region 1 and 2 behave same with current intensity, i.e from the growth phase to expansion phase, the density increases and from the expansion phase to the recovery phase it decreases. |
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| Keywords: | Field-aligned current Substorm phase Substorm currenlt wedge |
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