2008
DOI: 10.1029/2008gl034571
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Dual‐Doppler lidar observation of horizontal convective rolls and near‐surface streaks

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Cited by 27 publications
(42 citation statements)
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“…The idea is that a properly configured initial perturbation can grow to counter-rotating vortices that are tilted into the mean shear. Kim and Park (2003) and Iwai (2008), for example, mentioned a relationship between low-speed streak formation and the development of large-scale horizontal rolls. Both, the mixed-layer rolls and the streaks, can be linked to microfronts, which can be observed in sweep-and-ejection patterns or ramp-like patterns in the time series of wind velocity, temperature, and humidity (e.g.…”
Section: Introductionmentioning
confidence: 99%
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“…The idea is that a properly configured initial perturbation can grow to counter-rotating vortices that are tilted into the mean shear. Kim and Park (2003) and Iwai (2008), for example, mentioned a relationship between low-speed streak formation and the development of large-scale horizontal rolls. Both, the mixed-layer rolls and the streaks, can be linked to microfronts, which can be observed in sweep-and-ejection patterns or ramp-like patterns in the time series of wind velocity, temperature, and humidity (e.g.…”
Section: Introductionmentioning
confidence: 99%
“…They have a much smaller extent compared to mixed-layer rolls with only 100-200 m vertical extent and 500-2,000 m in the streamwise direction (e.g. Moeng and Sullivan 1994;Kim and Park 2003;Newsom et al 2008;Iwai 2008). Drobinski and Foster (2003) referred the lifetimes of the streaks to several tens of min.…”
Section: Introductionmentioning
confidence: 99%
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“…Dual-Doppler lidar methods seem to provide a valuable supplement here, since they allow the measurement of the complete two-dimensional wind field with a spatial resolution of a few tens of metres and a time resolution of the order of 10 s on planes of several km 2 in size. It has been shown that surface-layer streaks can be detected with horizontal dual-Doppler lidar scans (Newsom et al 2008;Iwai et al 2008) and a recent study by Träumner et al (2014) derived their length scales depending on stability and background wind speed. However, the limited time and spatial resolutions due to scan duration and the extent of the lidar pulse lead to severe inherent averaging in the resulting wind fields (Stawiarski et al 2013).…”
Section: Introductionmentioning
confidence: 99%
“…Clark et al (1994) described the fine-scale structure of gusts using lidar and simulated windstorms using two-and three-dimensional models to examine impacts of three-dimensionality, surface friction, and horizontal resolution on windstorms. We have also studied the feasibility of a mobile Doppler lidar that was developed at the National Institute of Information and Communication Technology (NICT) for observing local circulation (Ishii et al 2007(Ishii et al , 2008Sasaki et al 2010). In this work, intensive observations were conducted to target the strong downslope winds of the Zao mountain range during the winter monsoon season with a lidar system that was installed at the western corner of Sendai Airport.…”
Section: Introductionmentioning
confidence: 99%