Turbulent dispersion in cloud-topped boundary layers
نویسندگان
چکیده
منابع مشابه
Understanding Near-Surface and In-cloud Turbulent Fluxes in the Coastal Stratocumulus-topped Boundary Layers
The objective of this project is to quantify the spatial and temporal variability of the turbulent fluxes in the Monterey Bay area. The analysis from this study provides the surface forcing to our collaborators (AOSN investigators) and enable us to understand these variabilities in relation to the sea states and the stratocumulus-topped marine atmospheric boundary layers (MABL) properties. The ...
متن کاملLarge-eddy simulation of subtropical cloud-topped boundary layers: 2. Cloud response to climate change
How subtropical marine boundary layer (MBL) clouds respond to warming is investigated using large-eddy simulations (LES) of a wide range of warmer climates, with CO2 concentrations elevated by factors 2–16. In LES coupled to a slab ocean with interactive sea surface temperatures (SST), the surface latent heat flux (LHF) is constrained by the surface energy balance and only strengthens modestly ...
متن کاملTop-Hat Representation of Turbulence Statistics in Cloud-Topped Boundary Layers: A Large Eddy Simulation Study
Large eddy simulation is used to study top-hat parameterizations of secondand third-order scalar statistics in cumulus and stratocumulus cloud-topped boundary layers (CTBLs). Although the top-hat parameterizations based on commonly used conditional sampling methods are a useful approach to modeling the vertical fluxes in the simulated CTBLs, they fail to realistically represent the scalar varia...
متن کاملCloud transitions and decoupling in shear-free stratocumulus-topped boundary layers
Large-eddy simulations of shear-free stratocumulus-topped layers tend strongly toward a two-layer structure as the negative area in the buoyancy flux profile that would be necessary to maintain a mixed layer increases to more than 10% of the positive area. In addition to identifying a threshold for what amounts to a convective transition, the simulations provide further evidence that a commonly...
متن کاملInstabilities in turbulent boundary layers
An investigation of a model of turbulence generation in the wall region of a turbulent boundary layer is made through direct numerical simulations. The model is based on the instability of a streak. First, a laminar boundary layer disturbed by a continuous blowing through a slot is simulated in order to reproduce and further investigate the results reported from the experiments of Acarlar & Smi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Atmospheric Chemistry and Physics
سال: 2009
ISSN: 1680-7324
DOI: 10.5194/acp-9-1289-2009