Energy transfer by magnetopause reconnection and the substorm parameter ? |
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| Authors: | WD Gonzalez ALC Gonzalez |
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| Institution: | Institute de Pesquisas Espaciais—INPE, Conselho Nacional de Desenvolvimento Cientifico e Tecnológico—CNPq, 12200 São José dos Campos, S.P., Brasil |
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| Abstract: | An expression for the magnetopause reconnection power based on the dawn-dusk component of the reconnection electric field, that reduces to the substorm parameter ? for the limit that involves equal geomagnetic (BG) and magnetosheath (BM) magnetic field amplitudes at the magnetopause, is contrasted with the expression based on the whole reeonnection electric field vector (Gonzalez, 1973). The correlation examples of this report show that this (more general) expression for the reconnection power seems to correlate with the empirical dissipation parameter UT (Akasofu, 1981), with slightly better correlation coefficients than those obtained from similar correlations between the parameter ? and UT Thus, these (better) correlations show up for the more familiar values of the ratio BG/BM > 1. Nevertheless, the (expected) relatively small difference that seems to exist between these correlation coefficients suggests that, for practical purposes, the parameter ? could be used as well (instead of the more general expression) in similar correlation studies due to its simpler format. On the other hand, studies that refer mainly to the difference in the magnitudes of ? and of the more general expression are expected to give results with less negligible differences. |
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