Three-dimensional comparison of simulated large eddy structures with the lidar observations
Başlık çevirisi mevcut değil.
- Tez No: 401169
- Danışmanlar: PROF. GREG J. TRIPOLI, DR. EDWIN W. ELORANTA
- Tez Türü: Doktora
- Konular: Meteoroloji, Meteorology
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 1995
- Dil: İngilizce
- Üniversite: Unıversıty Of Wısconsın-Madıson
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Belirtilmemiş.
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: Belirtilmemiş.
Özet
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Özet (Çeviri)
A convectively mixed Atmospheric Boundary Layer (ABL) was simulated with no mean wind and a real topography by the University of Wisconsin-Madison Nonhydrostatic Modeling System (UW-NMS) using a Large Eddy Simulation (LES) approach. The structures of large eddies simulated by the LES were directly compared to those observed by the University of Wisconsin-Madison Volume Imaging Lidar (VIL) in a 3-D sense. For 100 m horizontal and 50 m vertical resolution, the dynamical structures of large eddies simulated by 3-D LES compared well to those observed by the VIL while scalar structures did not. In particular, the entrainment into the ABL was not captured. The comparisons of the results of the LES against the VIL observations suggested that the coordinate transformation implemented to include the effect of topography was responsible for underrepresentation of scalar structures because of truncation errors for the calculations of horizontal gradients. The 3-D comparisons of LES results against the 3-D observations of the VIL enabled a critical evaluation of the LES model's accuracy which was not possible using traditional verification methods. The VIL was demonstrated to be a useful observational tool for depicting the 3-D structures of large eddies. Finally, this study demonstrated that good agreement of LES results with the mean statistics does not necessarily show that LES models predict 3-D ABL statistics correctly.
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