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Intensive measurements and modelling of size segregated chemical composition of aerosols in June 2006 and Jan 2007

Wenche Aas, Rami Alfarra,Elke Bieber, Darius Ceburnis, Thomas Ellermann, Martin Ferm, Marina Frölich, Robert Gehrig, HC Hansson, Gyula Kiss, Ulla Makkonen, Nichos Mihalopoulos, Eiko Nemitz, Rene P. Otjes, Noemí Perez, Cinzia Perrino, Jean Philippe Putaud, Christian Plass-Duelmer, Gerald Spindler, Svetlana Tsyro, Milan Vana, Karl Espen Yttri.

www.emep.int


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Outline chemical composition of aerosols in June 2006 and Jan 2007

  • Background

    • EMEP Monitoring Strategy

    • Supersites

    • Sites, frequenzy etc

  • Results

    • Spatial, temporal level of PM, inorg, organic

    • Mass closure

    • Episodes

    • High resolution data (AMS, MARGA)

    • Comparison with EMEP model

  • Artefacts

    • EC/OC

    • Nitrogen gas/particle distribution

  • Outlook

    • New campaigns/intensive periods


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EMEP Monitoring programme chemical composition of aerosols in June 2006 and Jan 2007

  • Level 1

  • Main ions in precipitation and in air

  • heavy metals in precipitations

  • ozone

  • PM10 and PM2.5 mass

  • meteorology

  • at ca 125 sites

  • Level 2, supersite (joint EMEP/GAW)

  • POPs

  • Heavy metals in air and aerosols

  • VOC

  • EC/OC, OC speciation

  • Mineral Dust

  • PM speciation incl. gas particle ratio

  • + all level 1 activities

  • 15-20 sites

Both levels are mandatory by all Parties


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Objective of intensive measurments chemical composition of aerosols in June 2006 and Jan 2007

  • To underpin the EMEP programme

    • not realistic to require full daily chemical speciation or continuous measurements 365 days a year.

  • Coordinate and harmonise the research campaigns and monitoring efforts in Europe

  • Important for improving our current understanding of the temporal and spatial variation of PM and PM constituents in Europe, their sources and formation mechanisms, and for model validation.

  • Such measurement periods also motivate and prepare the Parties to initiate new measurements stated in the EMEP monitoring strategy.


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Sites and measurments chemical composition of aerosols in June 2006 and Jan 2007


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PM10 speciation, spring 2006 chemical composition of aerosols in June 2006 and Jan 2007

TC = OC* 1.4 + EC*1.1 (or meas TC *1.3)


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PM chemical composition of aerosols in June 2006 and Jan 200710 June 2006

PM10 Jan 2007

PM2.5 Jan 2007

PM2.5 June 2006

PM2.5 june 2006


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PM chemical composition of aerosols in June 2006 and Jan 200710 June 2006

PM10 Jan 2007

PM2.5 Jan 2007

PM2.5 June 2006

PM2.5 june 2006


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Montelibretti, IT01 chemical composition of aerosols in June 2006 and Jan 2007

Crustal

Seasalt

NO3-

NH4+

SO42-

OC*1.7

EC

Unknown

PM2.5 speciation

PM 10 speciation

June 2006

12%

15%

19.9 ± 10.7 mg/m3

37.9 ± 25.5 mg/m3

January 2007

12%

15%

27.5 ± 11.2 mg/m3

36.8 ± 12 mg/m3


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Montelibretti, IT01: chemical composition of aerosols in June 2006 and Jan 2007 29 June 2996

Flextra

PM 10

PM 2.5

35.3 mg/m3

90.3 mg/m3


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Melpitz, DE44 chemical composition of aerosols in June 2006 and Jan 2007

Ca2+, K+

Seasalt

NO3-

NH4+

SO42-

OC*1.7

EC

Unknown

PM2.5 speciation

PM1 speciation

PM 10 speciation

June 2006

37%

43%

49%

10 ± 4.3 mg/m3

13 ± 6.1 mg/m3

18.9 ± 6.3mg/m3

January 2007

29%

28%

37%

7.7 ± 4.4 mg/m3

12.3 ± 7.2 mg/m3

15.6 ± 7.3mg/m3


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Melpitz, 7 and 19 jan 2007 chemical composition of aerosols in June 2006 and Jan 2007


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Birkenes, NO01 (June 2006) chemical composition of aerosols in June 2006 and Jan 2007

Ca2+, K+

Seasalt

NO3-

NH4+

SO42-

OC*1.7

EC

Unknown

PM1 speciation

PM2.5 speciation

PM10 speciation

22%

34%

31%

7.0 ± 4 mg/m3

7.1 ± 4.3 mg/m3

10.2 ± 5.8 mg/m3

  • OM (PM1) = 31%

  • OM (PM2.5) = 35%

  • OM (PM10) = 28%

  • Minor differences in chemical composition with respect to size


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June 2006: Gas / aerosol partitioning chemical composition of aerosols in June 2006 and Jan 2007

of inorganic (ECN, NL; Univ. Kopio, FI; PSI, CH)

Cabauw, The Netherlands

Auchencorth, Scotland

Total PM2.5 = > 12.4 mg m-3

Total PM1 = 8.6 mg m-3

Mace Head, Ireland

Melpitz, Germany

Total PM1 = 6.0 mg m-3

Payerne, Switzerland

Total PM1 = 19.4 mg m-3

Harwell, England

Total PM2.5 = 13.7 mg m-3


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Total Measured Concentrations chemical composition of aerosols in June 2006 and Jan 2007June 2006


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Total Measured Concentrations chemical composition of aerosols in June 2006 and Jan 2007Jan 2007


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Overview of Average Concentrations: June 2006 chemical composition of aerosols in June 2006 and Jan 2007


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Overview of Average Concentrations: January 2007 chemical composition of aerosols in June 2006 and Jan 2007


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Comparison with EMEP Model chemical composition of aerosols in June 2006 and Jan 2007

See more at Svetlana Tsyro’s poster:

LP24, Thursday 13 sept


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Artefact in Nitrogen det. chemical composition of aerosols in June 2006 and Jan 2007

IT01, Jan 2007

IT01, June 2007

Artefact free measurements using denuders only done at Montelibretti


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Carbonaceous material in PM chemical composition of aerosols in June 2006 and Jan 20072.5 corrected for positive artefacts.


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Estimates of the positive artefact of OC in PM chemical composition of aerosols in June 2006 and Jan 200710 and PM2.5/PM1 -June 2006

QBQ-approach


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Next intensive periodes chemical composition of aerosols in June 2006 and Jan 2007

  • Harmonised with EUCAARI, www.atm.helsinki.fi/eucaari

  • Periods

    • 17 Sep – 16 Oct 2008 and 25 Feb – 26 Mar 2009

  • Focus

    • Daily and hourly measurements of aerosol components

    • size distributions

    • Artefact free gas/particle

    • Reference method for EC/OC (EUSAAR protocol)

    • Attempts to quantify aerosol water

    • Attempts to quantify the OC/OM ratio

    • primary vs. secondary and biogenic vs. anthropogenic

    • vertical distribution (EARLINET)

    • filling of thes spatial gaps in Southern and Eastern Europe.

  • Funding?

    • Try national research councils

    • or EUSAAR, ACCENT


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Conclusions chemical composition of aerosols in June 2006 and Jan 2007

  • Comprehensive and valuable data set for many further analysis

  • High spatial and temporal resolution covering different chemical regimes in Europe

  • Important for model development

  • Need to have control of artefacts with PM sampling (N and TC)

  • Future intensive periods will be harmonised with EUCAARI (sept 08, march 09)


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