Dependence of polar cap potential drop on interplanetary parameters
Dependence of polar cap potential drop on interplanetary parameters
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DOI：
10.1029/ja086ia09p07639
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发表时间：
1981-09
影响因子：
--
通讯作者：
P. Reiff;R. Spiro;T. Hill
中科院分区：
文献类型：
--
作者：
P. Reiff;R. Spiro;T. Hill
通过高倾角低空卫星获得的数据计算了穿过极冠的对流势降。潜在的测量值与上游太阳风中同时测量的参数的各种组合相关。大部分的电位降是成功地预测合并理论，虽然一个显着的背景电位降为35千伏不依赖于IMF参数，并归因于一个过程以外的合并。结果表明，IMF的小值放大了5-10倍，在向阳侧磁层顶，其中，考虑到，改善IMF参数和极帽电位下降之间的相关性。由于磁层的非线性响应对地磁活动指数的影响，电位降与IMF参数的相关性要比与地磁指数的相关性好。
The convection potential drop across the polar cap is computed from data obtained on high-inclination low-altitude satellites. Potential measurements are correlated with various combinations of parameters measured simultaneously in the upstream solar wind. Most of the potential drop is successfully predicted by merging theory, although a significant background potential drop of 35 kV does not depend on IMF parameters and is attributed to a process other than merging. Results indicate that small values of the IMF are amplified by a factor of 5-10 at the dayside magnetopause, which, when taken into account, improves correlations between IMF parameters and polar cap potential drop. Potential drop is better correlated with IMF parameters than with geomagnetic indices, due to nonlinear response of the magnetosphere affecting geomagnetic activity indices.