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Qingfang Jiang, James D. Doyle, Vanda Grubišić, and Ronald B. Smith

km, between 500 m and 6 km, and smaller than 500 m, respectively. The choice of the eddy size range is largely based on the spectral and wavelet analysis in the following sections. For the convenience of discussion, we separate the 16 legs into three groups. The top three legs above 5.5 km, characterized by relatively smooth waves, are referred to as wave legs. The flight segments below the mountaintop are predominately turbulence and are therefore referred to as turbulence legs. The four legs

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Michael Hill, Ron Calhoun, H. J. S. Fernando, Andreas Wieser, Andreas Dörnbrack, Martin Weissmann, Georg Mayr, and Robert Newsom

upstream of a downtown urban area. The scanning techniques were based on a set of coordinated intersecting vertical (RHI) scans. The extracted vertical profiles of horizontal velocity vectors, or “virtual towers,” were placed upwind of urban center in order to assess the effect of increased roughness on the mean flow. Collier et al. 2005 used a configuration that sought to intersect lidar beams at precise points in space. Davies et al. 2005 describe an analysis of errors associated with dual

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Qingfang Jiang and James D. Doyle

upstream wind speed. After removing these three outliers, the linear least squares regression using the other 21 points yields We refer to the wave amplitude, W ( U c ), given by (1) as the reference wave amplitude for a given upstream cross-barrier wind component, U c . To examine the connection between the relative humidity (RH) and the Sierra wave amplitude, the cases with the relative humidity (i.e., with respect to water throughout this paper) maximum (RH max ) within a vertical distance of 1

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