Coupling a land-surface model to large-eddy simulation to study the nocturnal boundary layer

Download item | Update item information
Publication Type thesis
School or College College of Engineering
Department Mechanical Engineering
Author Shingleton, Nick
Title Coupling a land-surface model to large-eddy simulation to study the nocturnal boundary layer
Date 2010
Description Negatively buoyant forces in the stable boundary layer (SBL) damp turbulent motions, resulting in decreased transport of momentum, heat and water vapor. During high levels of stratification this can cause intermittent turbulence, gravity waves and weak turbulent fluxes. In some cases, decoupling between the atmospheric boundary layer (ABL) and land-atmosphere fluxes can occur. Accurately reproducing these phenomena requires detailed treatment of the physical processes that govern the two-way dynamic interaction between surface properties and the ABL. Increasingly, large-eddy simulation (LES) is used to study land-atmosphere interactions in the SBL. In these studies, the dominant treatment of surface boundary conditions is to specify a known state or flux. This research uses LES that is fully coupled to a land-surface model (LSM) to investigate the SBL. The LSM explicitly solves for the transport of heat and water in a one-dimensional column of the upper soil. Coupling to the atmosphere is achieved through a surface budget, which partitions the available radiative forcing into ground heat flux and sensible and latent heat fluxes. Turbulent boundary layer profiles and surface fluxes are compared to field data and results from simulations of the GABLS3 LES intercomparison case.
Type Text
Publisher University of Utah
Subject Land-surface model; Large-eddy simulation; Nocturnal; Stable
Subject LCSH Boundary layer; Boundary layer -- Mathematical models; Eddies -- Mathematical models
Dissertation Institution University of Utah
Dissertation Name MS
Language eng
Rights Management ©Nick Shingleton
Format Medium application/pdf
Format Extent 3,002,703 bytes
Source Original in Marriott Library Special Collections, QC3.5 2010 .S45
ARK ark:/87278/s6z89t3n
Setname ir_etd
Date Created 2012-04-23
Date Modified 2018-03-20
ID 194173
Reference URL https://collections.lib.utah.edu/ark:/87278/s6z89t3n