Abstract
A cross‐correlation analysis of horizontal winds at 87 km obtained by the Poker Flat mesosphere‐stratosphere‐troposphere (MST) radar and College magnetometer horizontal component fluctuations has been performed on 3 years of summertime data. No consistent, significant peak in the average 4‐day estimate cross‐correlation results is apparent from year to year. Individual estimates similarly do not show evidence of a peak in cross correlation at a variable time lag during geomagnetically active intervals. In addition, the 1‐day 24‐ and 12‐hour wave amplitudes and phases and average zonal and meridional winds do not vary significantly and consistently with the daily averaged magnetometer horizontal component fluctuations or with the standard deviation thereof. The interval following the July 13, 1982, polar cap absorption event and geomagnetic storm, however, shows a different cross‐correlation estimate behavior and is characterized by significantly more westward zonal winds and enhanced 24‐hour zonal wind amplitude.
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