两日对称行星波发电机效应的数值研究

NUMERICAL STUDIES OF DYNAMO EFFECT DRIVEN BY A PLANETARY WAVES WITH 2-DAY PERIOD

本文从发电机理论出发,计算了一种波数为3、周期为两日的西行对称大气行星波风场所产生的电流及电场的全球分布以及随世界时的变化,并给出这种电场在不同经度随地方时的变化.这个电场沿磁力线传到F层后,将会对F层动力学过程起着重要的作用,可能是导致赤道异常两日波动的原因.

A global distribution and the UT variation of the dynamo electric field driven by the 2-day wave traveling westwards with longitudinal wave number 3 have been computed. The LT variations of this electric field for different longitude are also given. When this electric field tranasfers to the F region along the geomagnetic field line, it will play an important role in electrodynamic process in the F region. It may be the cause of the 2-day oscillation of equatorial ionization anomaly.