我们基于TRACE卫星上EUV观测,采用三阶迎风紧致格式模拟了1999年8月16日EUV增亮事件.数值模拟结果可以给出这次EUV增亮事件的形成和演化过程的一种可能的解释.重联X点处最初的重联流可能与EUV增亮相对应.合并磁岛产生的高度叠加的抛射流,可能与最初表现为吸收特征随后表现为EUV发射结构的提升物质相对应.双向重联喷流可能与继续沿着似乎开放磁力线向上喷发,或流向太阳表面的提升物质相对应.%The 16 August 1999 EUV brightenings is numerically simulated by a third-order upwind compact scheme, basing on the TRACE EUV observation. The present simulation can give a possible explanation to its formation and evolution. The initial reconnection jets at around X-point are responsible for the occurrence of EUV brightening. The strong and superposed ejections caused by coalescence of magnetic islands are possibly related to the lifted material which initially appeared as absorption features and Later EUV-emitting structures. The bi-directional reconnection jets may correspond to the lifted material either continued to move upward along the apparently open field lines or fell down to the surface.
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