During the last two decades many estimates of turbulence strength have been mabe by a variety of techniques in the mesosphere above northern Norway. We have assimilated many of these results and present them in this study, enabling the reader to note systematic differences. We concentrate on seasonal variation not only in an attempt to smooth out non-representative data, but also to identify the seasonal features themselves. We note both semi-annual and annual variations in turbulent intensity, depending on the height considered. Finally we address the aforementioned systematic differences between the methods and suggest possible causes in terms of each method's underlying assumptions.
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