Radiative heat transfer and hydrostatic stability in nocturnal fog

Toru Nishikawa, Shigenao Maruyama, Seigo Sakai

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

We have performed a one-dimensional and transient radiative heat transfer analysis in order to investigate interaction between atmospheric radiation and convective instability within a nocturnal fog. The radiation element method using the Ray Emission Model (REM2), which is a generalized numerical method, in conjunction with a line-by-line (LBL) method, is employed to attain high spectral resolution calculations for anisotropically scattering fog. The results show that the convective instability has a strong dependence on radiative properties of the fog. For the condition of a 20-μm droplet diameter and liquid water content of 0.1 × 10-3 kg m-3;, the temperature profile within the fog becomes "S" shaped, and a convective instability layer forms in the middle or lower level of the fog. However, for the same water content and a 40-μm diameter droplet, no strong convective instability layer forms, whereas for a 10-μm diameter droplet a strong convective instability is observed.

Original languageEnglish
Pages (from-to)273-286
Number of pages14
JournalBoundary-Layer Meteorology
Volume113
Issue number2
DOIs
Publication statusPublished - 2004 Nov 1

Keywords

  • Anisotropic scattering
  • Hydrostatic stability
  • Line-by-line method
  • Microphysical properties
  • Nocturnal fog
  • Radiative heat transfer

ASJC Scopus subject areas

  • Atmospheric Science

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