Mechanisms of formation of aerosol and gaseous inhomogeneities in the turbulent atmosphere

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

New mechanisms of formation of large-scale (more than 100-200 m) and small-scale (about 1 cm) inhomogeneities in spatial distributions of aerosols, droplets and gaseous admixtures are discussed. The large-scale inhomogeneities are formed in the vicinity of the temperature inversion layers due to excitation of the large-scale instability. This effect is caused by additional nondiffusive turbulent flux of particles in the vicinity of the temperature inversion. The characteristic time of excitation of the instability of concentration distribution of particles varies in the range from 0.3 to 3 h depending on the particle size and parameters of both, the atmospheric turbulent boundary layer and the temperature inversion layer. The derived equation for the effective velocity of particles provides parameterization of these turbulence effects, and it can be directly incorporated into existing atmospheric models. Small-scale inhomogeneities are related with a self-excitation of fluctuations of inertial particles concentration in turbulent atmosphere. This effect is responsible for the intermittency in spatial distribution of particles and gases.

Original languageEnglish
Pages (from-to)117-129
Number of pages13
JournalAtmospheric Research
Volume53
Issue number1-3
DOIs
StatePublished - 1 Jan 2000

Keywords

  • Preferential concentration of aerosols and gases
  • Turbulent atmosphere

Fingerprint

Dive into the research topics of 'Mechanisms of formation of aerosol and gaseous inhomogeneities in the turbulent atmosphere'. Together they form a unique fingerprint.

Cite this