Impact of biomass burning on BC - smhi.se/Session2_2_Impact biomass... · Local source episode –...

Christer Johansson, Stockholm City & Stockholm university, Sweden

Christer JohanssonDepartment of Environmental Science and Analytical Chemistry, Stockholm University, Stockholm Environment and Health Administration, City of Stockholm, Sweden

Impact of biomass burning on BC

City ofStockholm

Sanna Silvergren (SLB) Hwanmi Lim, Roger Westerholm, Ulrika Nilsson, Farshid Mashayekhy Rad (ACES)

Financed by


PAHs account for ca 6 % of all cancer cases in Greater Stockholm areaIn total 45 cases per year9 due to road traffic8 due to biomass burning29 due non-local sources

2018-12-21

2017

2017Using BC as indicator:452 premature deaths peryear in Greater Sthlm

55 (12%) due to biomass burning184 (41%) due to road traffic

173 (38%) due to non-local sources


Measurements

- -

AutomaticLow-volume samplerLeckel SEQ 47/50

PM10

DBTPheAnt3MPhe2MPhe2MAnt9MPhe1MPhe1,7DMPhe

4HCPPFluPyr1MF+3MF7HB[c]f4MPyr1MPyrB[c]PB[ghi]FB[a]A

TPhe+Chr3MChr6MChrB[b]FB[k]FB[j]FB[a]FB[e]PB[a]PPer

DB[a,j]ADB[a,c]ADB[a,h]AB[b]ChrPicI[1,2,3-cd]PB[ghi]pAnthanDB[b,k]FDB[a,l]

DB[a,e]PCorDB[a,i]PDB[a,h]PΣPAH (ng/m3)LGM+GΣSugar (ng/m3)Total BCBiomass BC

NOx (µg/m3)PM2.5 (µg/m3)PM10 (µg/m3)Temp (ºC)AQ4HCPPQBAQBADQΣOPAH (ng/m3)

46 PAHs (particle phase)

Levoglucosan, mannosan, galactosan

NOx, BC, PM10, PM2.5, Meteorology

Christer Johansson, Stockholm City & Stockholm university, Sweden - -

Analytical methods

Christer Johansson, Stockholm City & Stockholm university, Sweden - -

DelsboResidentailarea

EnskedeResidentialarea

YtterjärnaSmall residential area

Aspvreten - rural

SitesStockholmUrban background

1 UB3 residential1 rural


Delsbo

2018-12-21


Enskede

2018-12-21


Järna

2018-12-21


Tracers of cellulose combustion:Levoglucosan, mannosan, galactosan

2018-12-21

Levoglucosan

Mannosan + galactosan


Biomass-BC vsLevoglucosan, PAH, BaP

2018-12-21

Levo

gluc

osan

Bio BC

Bio BC

Bio BC

BaP

Sum

of50

PA

H


Fraction of PM2.5UB Stockholm, Nov 2012 – may 2014


UB StockholmLow total BC => high biomass fraction


Calculate share of X in air coming from biomass burning

using levoglucosan as tracer

[Conc X from biomass in air] =

(X/Levoglucosan in biomass burning )x

[Conc Levoglucosan in air]

2018-12-21

Christer Johansson, Stockholm City & Stockholm university, Sweden 2018-12-21

BaP = 0.0011 ± 0.0001 x Levoglucosan, r 2 = 0.54

Critical review of methods to estimate contribution from biomass burning


ENSKEDE% BaP from biomass burning

assuming BaP(bb) = 0.0011 x Levoglucosan

2018-12-21

UncertaintyLarge variation in compositionof biomass burning

40% - 100% from biomassburning

% fr

om b

iom

ass

burn

ing


Identification of biomass BC in air pollution episodes


Local source episode – mainly biomass

Rural BC

UB BC-fossil

UB BC-biomass

Rural PM2.5

Diff-temp - inversion


BC from biomass

Bonfire April 30th

0

200

400

600

800

1000

1200

1400

1600

1800

29 april 2013 29 april 2013 30 april 2013 30 april 2013 1 maj 2013 1 maj 2013 2 maj 2013 2 maj 2013 3 maj 2013

BC

(n

g/m

3)

BC, fossil

BC Bio

April 30th, Bonfire

Based on measurements using a multiwavelengthAE33 aethalometer in central Stockholm


Rural BC

UB BC-fossil

UB BC-biomass

Rural PM2.5

Long-range transport episode


Conclusion

• The 7 wavelength aethalometer provides usefulinfomration on the impact of biomass burning on BC and other air pollutants


City ofStockholmThank you!

[email protected]

Impact of biomass burning on BC - smhi.se/Session2_2_Impact biomass... · Local source episode –...

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