| Popis: |
Using the same data as that used in Part I of this paper, a study has been made of the features of the electrojet currents on a number of individual Quiet Days during the IGY in South America. Day to day variability in the strength and form of the electrojet are observed. Due to the complex nature of the latitudinal variation in current strength, it seems unlikely that calculations of electrojet parameters such as width and position can be determined with any accuracy on the basis of a simple model electrojet. Since the electrojet region is at times under the influence of only one of the current vortices and at other times, both vortices contribute to the electrojet current, it is suggested that for some equatorial geophysical studies, it may be necessary to classify the days, or even parts of days, into N—northern type, S—southern type and E—equatorial type, according as the overhead currents for a particular station belong to one or both vortices. For this reason and also as a result of the complexity in the form of the electrojet currents, correlation of electrojet parameters with those at other latitudes may be very difficult to interpret correctly. |
