Large Eddy Simulations of the Atmospheric Boundary Layer East of the Colorado Rockies
Author: Keeley R. Costigan
Publisher:
Published: 1992
Total Pages: 142
ISBN-13:
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Author: Keeley R. Costigan
Publisher:
Published: 1992
Total Pages: 142
ISBN-13:
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Publisher:
Published: 1992
Total Pages: 140
ISBN-13:
DOWNLOAD EBOOKLarge eddy simulation, LES, has often been carried out for the idealized situation of a simple convective boundary layer. Studies of dual Doppler radar and aircraft data from the Phoenix II experiment indicate that the boundary layer of the Colorado High Plains is not a purely convective boundary layer and it is influenced by the mountains to the west. The purpose of this study is to investigate the atmospheric boundary layer on one particular day on the Colorado High Plains. This research applies a LES nested within larger grids, which contain realistic topography and can simulate the larger-scale circulations initiated by the presence of the mountain barrier. How and to what extent the atmospheric boundary layer of the Colorado High Plains is influenced by larger scale circulations and other phenomena associated with the mountain barrier to the west is investigated. The nested grid LES reproduces the characteristics of the atmosphere for the case study day reasonably well. The mountains influence the atmospheric boundary layer over the plains to the east in several ways. The mountains contribute to the vertical shear of the horizontal winds through the thermally-induced mountain-plains circulation. As a consequence of the wind shear, the boundary layer that develops over the mountains is advected eastward over the top of the plains boundary layer, which is developing separately. This layer is marked by a mixture of gravity waves and turbulence and is atypical of a purely convective boundary layer. Just below this layer, the capping inversion of the plains boundary layer is weak and poorly defined compared to the inversions capping purely convective boundary layers. Gravity waves, triggered by the obstacle of the Rocky Mountains and by convection in the mountain boundary layer, also influence the atmosphere above the Colorado High Plains. These influences are found to have significant effects on the turbulence statistics and the energy spectra.
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Publisher:
Published: 1994
Total Pages: 836
ISBN-13:
DOWNLOAD EBOOKAuthor: Srinidhi N. Gadde
Publisher:
Published: 2021
Total Pages: 0
ISBN-13: 9789036551809
DOWNLOAD EBOOKAuthor: Canadian Meteorological and Oceanographic Society
Publisher: NRC Research Press
Published: 1997
Total Pages: 654
ISBN-13: 9780969841449
DOWNLOAD EBOOKA collection of 27 invited refereed papers by scientists in the field of numerical modelling, this volume provides a comprehensive referecne for students and researchers of numerical weather prediction, climate simulation, dynamic meterology and ocean modelling."
Author: Marco Giovanni Giometto
Publisher:
Published:
Total Pages: 0
ISBN-13:
DOWNLOAD EBOOKAuthor: Sukanta Basu
Publisher:
Published: 2004
Total Pages: 268
ISBN-13:
DOWNLOAD EBOOKAuthor: Lynne Fosberry
Publisher:
Published: 1994
Total Pages: 242
ISBN-13:
DOWNLOAD EBOOKAuthor: Working Group on Large-Eddy Simulation (Boulder, Colo.)
Publisher:
Published: 1984
Total Pages: 122
ISBN-13:
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