The Statistic Study of the Energy Coupling Coefficient Between Solar Wind and the Magnetosphere
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摘要: 本文利用1972—1974年期间十八次事例的太阳风和地磁资料,通过回归分析法计算了各次事例的太阳风和磁层能量的磁耦合参量α值.结果表明,不同事例的α值各不相同,而且显得十分离散.同时,对一些参数进行调节修正后,也不能从本质上改变α取值分散的特点.可见,对不同事例,能量传输机制有可能是不相同的,而电磁能量传输过程可能是最重要的,但不是唯一的.Abstract: In this paper, 18 periods of data including solar wind parameters and geomagnetic indices from 1972 to 1974 are used in regression analysis to specify the value of magnetic coupling coefficient a for the energy transfer from solar wind to the magne-tosphere. The values calculated are very different for different events with no superior band. The dispersion pattern of the results keeps for modified versions of controlling factors in regression processes. This indicates that the mechanism of energy transfer from solar wind to the magnetosphere varies from event to event. The electromagnetic coupling may be the most important among the possible coupling mechanism but not the unique.
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