The Variations of Cn 2Between 4 and 18 km above Sea Level as Measured over 5 Years

We computed the monthly average backscattered power over a five-year period for the Fleming 50 MHz wind profiler, which is proportional to CN2. We found that in addition to seasonal cycle in CN2 below the tropopause, there was a year-to-year variation as well. Above the tropopause, the seasonal vari...

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Bibliographic Details
Published in:Journal of applied meteorology (1988) 1990-07, Vol.29 (7), p.645-651
Main Authors: Frisch, A. S., Weber, B. L., Wuertz, D. B., Strauch, R. G., Merritt, D. A.
Format: Article
Language:English
Subjects:
Aircraft
Antennas
Light refraction
Meteorology
NOTES AND CORRESPONDENCE
Pulse duration
Radar
Radar echoes
Reflectance
Statistical median
Turbulence
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Summary:We computed the monthly average backscattered power over a five-year period for the Fleming 50 MHz wind profiler, which is proportional to CN2. We found that in addition to seasonal cycle in CN2 below the tropopause, there was a year-to-year variation as well. Above the tropopause, the seasonal variations were almost gone; however, there were significant changes with periods longer than one year. We examined a shorter back-scattered power record from the Stapleton wind profiler and found similar longer-term trends. These long-term trends will affect the performance of wind profilers.
ISSN:0894-8763
1520-0450