Characterising the shape, size, and orientation of cloud‐feeding coherent boundary‐layer structures

  title={Characterising the shape, size, and orientation of cloud‐feeding coherent boundary‐layer structures},
  author={Leif C. Denby and Steven J. B{\"o}ing and Douglas J. Parker and Andrew N. Ross and Steven M. Tobias},
  journal={Quarterly Journal of the Royal Meteorological Society},
  pages={499 - 519}
  • L. DenbyS. Böing S. Tobias
  • Published 17 August 2020
  • Environmental Science
  • Quarterly Journal of the Royal Meteorological Society
Two techniques are presented for characterisation of cloud‐feeding coherent boundary‐layer structures through analysis of large‐eddy simulations of shallow cumulus clouds, contrasting conditions with and without ambient shear. The first technique is a generalisation of the two‐point correlation function, where the correlation length‐scale as well as the orientation can be extracted. The second technique identifies individual coherent structures and decomposes their vertical transport by the… 

On the energy–consistent plume model in the convective boundary layer

Size‐Dependent Characteristics of Surface‐Rooted Three‐Dimensional Convective Objects in Continental Shallow Cumulus Simulations

A segmentation algorithm is applied to high resolution simulations of shallow continental convection to identify individual convective 3D objects within the convective boundary layer, in order to



Large-Eddy Simulation: How Large is Large Enough?

The length scale evolution of various quantities in a clear convective boundary layer (CBL), a stratocumulustopped boundary layer, and three radiatively cooled (‘‘smoke cloud’’) convective boundary

Role of Surface Friction on Shallow Nonprecipitating Convection

AbstractThe role of surface friction on shallow nonprecipitating convection is investigated using a series of large-eddy simulations with varying surface friction velocity and with a cloud

A Joint Probability Density–Based Decomposition of Turbulence in the Atmospheric Boundary Layer

AbstractIn convective flows, vertical turbulent fluxes, covariances between vertical velocity and scalar thermodynamic variables, include contributions from local mixing and large-scale coherent

A Large Eddy Simulation Intercomparison Study of Shallow Cumulus Convection

This paper reports an intercomparison study on undisturbed trade wind cumulus convection under steadystate conditions as observed during the Barbados Oceanographic and Meteorological Experiment

Automated tracking of shallow cumulus clouds in large domain, long duration Large Eddy Simulations

Abstract. This paper presents a method for feature tracking of fields of shallow cumulus convection in large eddy simulations (LES) by connecting the projected cloud cover in space and time, and by

Disentangling the Cosmic Web. I. Morphology of Isodensity Contours

We apply Minkowski functionals and various derived measures to decipher the morphological properties of large-scale structure seen in simulations of gravitational evolution. Minkowski functionals of

Diagnosing Coherent Structures in the Convective Boundary Layer by Optimizing Their Vertical Turbulent Scalar Transfer

A new method is introduced to identify coherent structures in the convective boundary layer, based on optimizing the vertical scalar flux in a two-fluid representation of turbulent motions as

SciPy 1.0: fundamental algorithms for scientific computing in Python

An overview of the capabilities and development practices of SciPy 1.0 is provided and some recent technical developments are highlighted.

Object‐Oriented Identification of Coherent Structures in Large Eddy Simulations: Importance of Downdrafts in Stratocumulus

A novel methodology is proposed to characterize coherent structures in large eddy simulations. Based on two passive tracers emitted respectively at the surface and at cloud top, the object‐oriented