Marine Stratus—A Boundary-Layer Model

Author:

Taylor Peter A.1ORCID

Affiliation:

1. Earth and Space Science and Engineering, York University, Toronto, ON M3J 1P3, Canada

Abstract

A relatively simple 1D RANS model of the time evolution of the planetary boundary layer is extended to include water vapor and cloud droplets plus transfers between them. Radiative fluxes and flux divergence are also included. An underlying ocean surface is treated as a source of water vapor and as a sink for cloud or fog droplets. With a constant sea surface temperature and a steady wind, initially dry or relatively dry air will moisten, starting at the surface. Turbulent boundary layer mixing will then lead towards a layer with a well-mixed potential temperature (and so temperature decreasing with height) and well-mixed water vapor mixing ratio. As a result, the air will, sooner or later, become saturated at some level, and a stratus cloud will form.

Publisher

MDPI AG

Reference21 articles.

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