publication . Article . 2006

Stochastic Models for the Kinematics of Moisture Transport and Condensation in Homogeneous Turbulent Flows

O'Gorman, Paul A.; Schneider, Tapio;
Open Access
  • Published: 01 Nov 2006 Journal: Journal of the Atmospheric Sciences, volume 63, pages 2,992-3,005 (issn: 0022-4928, eissn: 1520-0469, Copyright policy)
  • Publisher: American Meteorological Society
  • Country: United States
Abstract
<jats:p> The transport of a condensing passive scalar is studied as a prototype model for the kinematics of moisture transport on isentropic surfaces. Condensation occurs whenever the scalar concentration exceeds a specified local saturation value. Since condensation rates are strongly nonlinear functions of moisture content, the mean moisture flux is generally not diffusive. To relate the mean moisture content, mean condensation rate, and mean moisture flux to statistics of the advecting velocity field, a one-dimensional stochastic model is developed in which the Lagrangian velocities of air parcels are independent Ornstein–Uhlenbeck (Gaussian colored noise) pr...
Subjects
arXiv: Physics::Atmospheric and Oceanic Physics
free text keywords: Caltech Library Services, Atmospheric Science, Condensation, Advection, Mechanics, Moisture, Turbulence, Brownian motion, Atmospheric sciences, Flux, Thermodynamics, Physics, Stochastic modelling, Two-dimensional flow
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