Original scientific paper

VERTICAL EDDY POLLUTANT FLUX IN URBAN CONDITIONS

Marina Grčić ; Šumarska škola Gaza bb, 47000 Karlovac, Hrvatska
Nadežda Šinik ; Geofizički zavod "Andrija Mohorovičić" Sveučilište u Zagrebu Horvatovac bb, 41 000 Zagreb, Hrvatska

Abstract

A method has been proposed for deriving the vertical turbulent flux of light, chemically inert pollutant from meteorological and urban parameters which are easily available. Based on the flux-gradient theory and a division of urban volume in UCL (Urban Canopy Layer) and UBL (Urban Boundary Layer) an iterative procedure has been adopted for the pollutant flux estimation with urban-sensible heat and surface roughness as the basic input. The method has been applied to a range of possible urban characteristics known from existing literature. It came out that the influence of surface roughness upon pollutant turbulent vertical fluxes predominated in all stabilities and also that it was rather insensitive of UCL height. Besides, theoretical speculations found turbulent vertical fluxes of pollutants considerably weaker than turbulent fluxes of momentum.

Keywords

Vertical eddy pollutant flux; urban canopy layer; sensible heat flux; surface roughness

Hrčak ID:

68199

URI

https://hrcak.srce.hr/68199

Publication date:

19.11.1993.

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