The influence of vehicle emission characteristics and meteorological conditions on urban NO2 concentrations

被引：5

作者：

Harkonen, J ^{[1
]}

Kukkonen, J ^{[1
]}

Valkonen, E ^{[1
]}

Karppinen, A ^{[1
]}

机构：

[1] Finnish Meteorol Inst, FIN-00810 Helsinki, Finland

来源：

INTERNATIONAL JOURNAL OF VEHICLE DESIGN | 1998年 / 20卷 / 1-4期

关键词：

dispersion of air pollutants; nitrogen dioxide; vehicle emissions;

D O I：

10.1504/IJVD.1998.001823

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

A major fraction of nitrogen oxides released from traffic is commonly nitrogen monoxide (NO); however, the proportion of NO2 in exhaust emissions can range from less than 1% to more than 50%. The released NO is chemically transformed into the more harmful nitrogen dioxide (NO2); the reaction time-scale is typically a few minutes in urban daylight conditions. This paper presents numerical results concerning the influence of the tailpipe NO2/NOx fraction and meteorological conditions on the ambient air NO2 concentrations. We have applied the road network dispersion model CAR-FMI in the computations.

引用

页码：125 / 130

页数：6