Document Type
Article
Publication Date
8-1-2008
Publication Title
Journal of the Atmospheric Sciences
Abstract
Mixing between shallow cumulus clouds and their environment is studied using large-eddy simulations. The origin of in-cloud air is studied by two distinct methods: 1) by analyzing conserved variable mixing diagrams (Paluch diagrams) and 2) by tracing back cloud-air parcels represented by massless Lagrangian particles that follow the flow. The obtained Paluch diagrams are found to be similar to many results in the literature, but the source of entrained air found by particle tracking deviates from the source inferred from the Paluch analysis. Whereas the classical Paluch analysis seems to provide some evidence for cloud-top mixing, particle tracking shows that virtually all mixing occurs laterally. Particle trajectories averaged over the entire cloud ensemble also clearly indicate the absence of significant cloud-top mixing in shallow cumulus clouds.
Repository Citation
Heus, Thijs; van Dijk, Gertjan; Jonker, Harmen J.J.; and Van den Akker, Harry E.A., "Mixing in Shallow Cumulus Clouds Studied by Lagrangian Particle Tracking" (2008). Physics Faculty Publications. 222.
https://engagedscholarship.csuohio.edu/sciphysics_facpub/222
DOI
10.1175/2008JAS2572.1
Version
Publisher's PDF
Publisher's Statement
© Copyright 2008 AMS
Volume
65
Issue
8
