Concentration profiles of particles settling in the neutral and stratified atmospheric boundary layer

被引：22

作者：

Chamecki, Marcelo

van Hout, Rene

Meneveau, Charles ^{[1
]}

Parlange, Marc B.

机构：

[1] Johns Hopkins Univ, Dept Mech Engn, Ctr Environm & Appl Fluid Mech, Baltimore, MD 21218 USA

[2] Johns Hopkins Univ, Dept Geog & Environm Engn, Ctr Environm & Appl Fluid Mech, Baltimore, MD 21218 USA

[3] Technion Israel Inst Technol, Fac Mech Engn, IL-32000 Haifa, Israel

[4] Ecole Polytech Fed Lausanne, Sch Architecture Civil & Environm Engn, Lausanne, Switzerland

来源：

BOUNDARY-LAYER METEOROLOGY | 2007年 / 125卷 / 01期

基金：

美国国家科学基金会;

关键词：

atmospheric stability; corn pollen; equilibrium profiles; pollen concentration; settling velocity; suspended heavy particles;

D O I：

10.1007/s10546-007-9194-5

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

An expression for the vertical equilibrium concentration profile of heavy particles, including the effects of canopy on the eddy diffusivity as well as corrections for atmospheric stability, is proposed. This expression is validated against measurements of vertical concentration profiles of corn pollen above a corn field. The fitted theoretical profiles show that particle settling is correctly accounted for. The sensitivity to variations in the turbulent Schmidt number, settling velocity and stability corrections are explicitly characterized. The importance of independent measurements of the surface flux of pollen in future experiments is noted.

引用

页码：25 / 38

页数：14

共 25 条

[1] VENTILATION REQUIRED TO ENTRAIN SMALL PARTICLES FROM LEAVES [J].