COST 715 Meteorology Applied to UrbanAir Pollution ProblemsSeptember 98-September 2003

•Problem•Issues covered•Successes•Conclusions

Traditional approachto ABLnon-dimensionalprofiles

i ii iii

wE

Dynamics

Thermodynamics

In-street pollution

unstable

day

neutral stable

night

stability

sky conditions

temperatureprofile

boundarylayerheight

turbulenceintensity

radiationbalance

heig

ht

temperature

Parameters

uC wind in urban canopyLC canopy length scalewE exchange velocityuref reference windhref blending heighturural->uurban transfer functionhurban height of urban boundary layerz0 roughness length based on geometry

Relationship between incremental NOx and incremental NO2 0 10 20 30 40

0

6

12

18

24

30

RuralElsewhereCentral LondonPS Method 1PS Method 2Photostationary

Power station empirical relationships

Incremental NOx ug/m3

Incr

emen

tal

NO

2 ug

/m3

0

0 50 100 150 2000

6

12

18

24

30

Laxen(2002) CL roadsideTG(02) CL roadsideRuralElsewhereCentral LondonPhotostationary

Roadside increments

Incremental NOx ug/m3

Incr

emen

tal

NO

2 ug

/m3

0

Relationship between incremental NOx concentrations in road side air and incremental NO2 concentration

BUBBLE experiment Basel

Recommendations on deriving meteorological parameters for application to urban air pollution estimates

Mixing height for urban background concentrations, atmospheric stability for dispersion

Street and urban background wind, for dispersion within above streets

Urban episodes, availability of tools, potential developments, uncertainty

Inventory of urban meteorological sites, use of data, recommendations for siting, local meteorological data and corrections, choice site location.

Working Group 1Urban dynamics

Experimental data

Test geometric and othermethods

Working Group 4Routine dispersion calculations

Corrections to urban profiles

Routine measurements at urbanmeteorological sites

Working Group 2urban thermodynamics

Experimental data

Methods for surface heat fluxand mixing layer depth

Grid square averaged

Roughness lengthSurface heat flux

Boundaryconditions for

Meso-scaleModels

Working Group 3

Prediction of urban air qualityepisodes

Kukkonen, J. (editor), 2001, COST action 715, Meteorology applied to Urban Air Pollution Problems, Working Group 3, Meteorology during peak pollution episodes, Status Report, Luxembourg Office for Official Publications of the European Communities, EUR 19448, European Commission, Brussels, 73 pages

Middleton D R, 2002, Meteorological challenges in urban air pollution, Clean Air, 32, 14-19

Piringer M and Kukkonen J (editors), 2002, COST action 715, Meteorology applied to Urban Air Pollution Problems, Mixing height, inversions and episodes in urban areas (Toulouse, 3-4 October 2001), Luxembourg Office for Official Publications of the European Communities, to be published, available at http:cost.fmi.fi/index.html Rotach M. (editor) 2001, COST action 715, Meteorology applied to Urban Air Pollution Problems, Workshop on Urban Boundary Layer Parameterisations (Zurich, 24-5 May 2001) Luxembourg Office for Official Publications of the European Communities, to be published

Schatzmann M, Brechler J and Fisher B (editors), 2001, Preparation of meteorological input data for urban site studies, COST European co-operation in the field of scientific and technical research, Luxembourg Office for Official Publications of the European Communities, EUR 19446  

Some publications

COST 715 Achievements

Raised issue of urban meteorology

Inventory of urban met sites

New data sets

New theories

International involvement

New projects FUMAPEX