The effect of stratification on the aerodynamic roughness length and displacement height

被引：63

作者：

Zilitinkevich, S. S. ^{[1
,2
,3
]}

Mammarella, I. ^{[1
,2
]}

Baklanov, A. A. ^{[4
]}

Joffre, S. M. ^{[1
]}

机构：

[1] Finnish Meteorol Inst, Dept Meterol Res, FIN-00101 Helsinki, Finland

[2] Univ Helsinki, Div Atmospher Sci, FIN-00014 Helsinki, Finland

[3] Nansen Environm & Remote Sensing Ctr, N-5006 Bergen, Norway

[4] Danish Meteorol Inst, DK-2100 Copenhagen, Denmark

来源：

BOUNDARY-LAYER METEOROLOGY | 2008年 / 129卷 / 02期

基金：

芬兰科学院;

关键词：

air pollution; convection; displacement height; logarithmic surface layer; roughness length; stable stratification; urban and vegetation canopies;

D O I：

10.1007/s10546-008-9307-9

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

The roughness length, z(0u) , and displacement height, d(0u) , characterise the resistance exerted by the roughness elements on turbulent flows and provide a conventional boundary condition for a wide range of turbulent-flow problems. Classical laboratory experiments and theories treat z(0u) and d(0u) as geometric parameters independent of the characteristics of the flow. In this paper, we demonstrate essential stability dependences-stronger for the roughness length (especially in stable stratification) and weaker but still pronounced for the displacement height. We develop a scaling-analysis model for these dependences and verify it against experimental data.

引用

页码：179 / 190

页数：12

共 21 条

[1] BUOYANCY EFFECTS IN A HORIZONTAL FLAT-PLATE BOUNDARY-LAYER [J].