Small ScaleTurbulence Observed Simultaneously by Radiosondes and the MU Radar

Abstract : A Japanese-French field campaign devoted to study small-scale turbulence and instabilities in the lower atmosphere was conducted in September 2011 for three weeks at Shigaraki MU observatory (34.85N, 136.15E; Japan). The VHF MU radar was operated in range imaging mode [e.g. 1] for turbulence observations at high temporal ( 25 s) and high range (typically 30 m) resolutions. In addition, 59 balloons instrumented with RS92G Vaisala radiosondes were succesfully launched during the campaign when the radar was operated. Reference [2] showed that turbulence can be detected from raw vertical profiles of temperature measured from standard radiosoundings through the detection of overturns using the so-called Thorpe analysis [3]. In the present work, we shall present some comparison results between radiosonde and MU radar data.
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Richard Wilson, H. Luce, H. Hashiguchi, Francis Dalaudier, F. Fukao, et al.. Small ScaleTurbulence Observed Simultaneously by Radiosondes and the MU Radar. 9th International Symposium on Tropospheric Profiling (ISTP), Sep 2012, L'Aquila, Italy. 3 p. ⟨hal-00740333⟩

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