Composite Vertical Structure of Vertical Velocity in Nonprecipitating Cumulus Clouds

Composite Vertical Structure of Vertical Velocity in Nonprecipitating Cumulus Clouds

Vertical transects of Doppler vertical velocity data, obtained from an airborne profiling millimeter-wave cloud radar, are composited for a large number of cumulus clouds (Cu) at various stages of their life cycle, to examine typical circulations patterns. The Cu clouds range in depth between ;500 and 6000 m and are generally nonprecipitating. They were sampled on board the University of Wyomin...

Dependence of entrainment in shallow cumulus 1 convection on vertical velocity and distance to cloud

4 characteristics is investigated using large-eddy simulations (LES) of the re-5 sponse of shallow cumulus convection to a small-amplitude temperature per-6 turbation that is horizontally uniform and localized in height. The simulated 7 cumulus fields are analyzed in the framework of an ensemble of entraining 8 plumes by tracking a large number of Lagrangian parcels embedded in the 9 LES and gr...

Importance of vertical velocity variations in the cloud droplet nucleation process of marine stratus clouds

[1] Eleven cloud cases through marine stratus, obtained during two field experiments in the North Atlantic Ocean, are used to study the sensitivity of cloud droplet nucleation to the vertical gust velocity. Selected cloud microphysical data, size-distributed aerosol properties and particle chemistry are applied in an adiabatic parcel model. The nucleated cloud droplet number concentrations (N) ...

Vertical Structure of Tropical

fourier migration for vertical velocity variations

the stolt (f-k) migration algorithm is a direct (i.e. non-recursive) fourier-domain technique based on a change of variables (or equivalently, a mapping) that converts the input spectrum to the output spectrum. the algorithm is simple and efficient but limited to constant velocity. a v(z)(f-k) migration method, capable of very high accuracy for vertical variations of velocity, can be formulated...